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Functional magnetic resonance imaging

Index Functional magnetic resonance imaging

Functional magnetic resonance imaging or functional MRI (fMRI) measures brain activity by detecting changes associated with blood flow. [1]

119 relations: Alzheimer's disease, Amygdala, Angelo Mosso, Antihistamine, Arteriole, Astrocyte, Auditory cortex, Autism, Basal ganglia, Bayes' theorem, Behaviour therapy, Bell Labs, Blood, Blood-oxygen-level dependent imaging, Blood–brain barrier, Brain, Brain mapping, Brodmann area, Caffeine, Calcium, Capillary, Cardiac pacemaker, Caudate nucleus, Cell signaling, Charles Scott Sherrington, Cingulate cortex, Classical conditioning, Convolution, Correlation and dependence, CT scan, Default mode network, Dentate gyrus, Diamagnetism, Diffusion MRI, Dorsolateral prefrontal cortex, Electrocorticography, Electroencephalography, Event-related functional magnetic resonance imaging, Expectation–maximization algorithm, Experiment, Forward chaining, Fourier inversion theorem, Fourier transform, Frontal lobe, Functional neuroimaging, Gaussian filter, General linear model, Generalized linear model, Genotoxicity, Habituation, ..., Haemodynamic response, Harvard University, Hemodynamics, Hemoglobin, Hippocampus, Hippocampus proper, Ion transporter, Jean Talairach, Kenneth Kwong, Lateral geniculate nucleus, Lie detection, Linear model, Linus Pauling, List of neuroscience databases, Lorentz force, Magnetoencephalography, Markov random field, McGill University Health Centre, Midbrain, Multiple comparisons problem, Mutual information, Nature (journal), Near-infrared spectroscopy, Neuromarketing, Neuron, Nitric oxide, Normal distribution, Paradigm, Paramagnetism, Parameter, Parietal lobe, Philosophy Now, Positron emission tomography, Power (statistics), Precautionary principle, Prefrontal cortex, Primary motor cortex, Primary somatosensory cortex, Pulvinar nuclei, Putamen, Randomization, Recognition memory, Red blood cell, Remember versus know judgements, Resting state fMRI, Rhesus macaque, Seiji Ogawa, Signal enhancement by extravascular water protons, Signal-to-noise ratio, Spectral density, Spinal cord, Stanford University, Statistical classification, Stefano Sandrone, Subiculum, Supplementary motor area, Synapse, Temporal lobe, Tesla (unit), Thalamus, Thulium, Transcranial magnetic stimulation, University of Cambridge, Variable and attribute (research), Vasodilation, Vein, Visual cortex, Voxel, William James. Expand index (69 more) »

Alzheimer's disease

Alzheimer's disease (AD), also referred to simply as Alzheimer's, is a chronic neurodegenerative disease that usually starts slowly and worsens over time.

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Amygdala

The amygdala (plural: amygdalae; also corpus amygdaloideum; Latin from Greek, ἀμυγδαλή, amygdalē, 'Almond', 'tonsil') is one of two almond-shaped groups of nuclei located deep and medially within the temporal lobes of the brain in complex vertebrates, including humans.

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Angelo Mosso

Angelo Mosso (30 May 1846 – 24 November 1910) is the 19th century Italian physiologist who invented the first neuroimaging technique ever, known as 'human circulation balance'.

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Antihistamine

Antihistamines are drugs which treat allergic rhinitis and other allergies.

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Arteriole

An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries.

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Astrocyte

Astrocytes (Astro from Greek astron.

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Auditory cortex

The primary auditory cortex is the part of the temporal lobe that processes auditory information in humans and other vertebrates.

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Autism

Autism is a developmental disorder characterized by troubles with social interaction and communication and by restricted and repetitive behavior.

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Basal ganglia

The basal ganglia (or basal nuclei) is a group of subcortical nuclei, of varied origin, in the brains of vertebrates including humans, which are situated at the base of the forebrain.

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Bayes' theorem

In probability theory and statistics, Bayes’ theorem (alternatively Bayes’ law or Bayes' rule, also written as Bayes’s theorem) describes the probability of an event, based on prior knowledge of conditions that might be related to the event.

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Behaviour therapy

Behaviour therapy is a broad term referring to clinical psychotherapy that uses techniques derived from behaviourism.

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Bell Labs

Nokia Bell Labs (formerly named AT&T Bell Laboratories, Bell Telephone Laboratories and Bell Labs) is an American research and scientific development company, owned by Finnish company Nokia.

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Blood

Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

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Blood-oxygen-level dependent imaging

Blood-oxygen-level dependent contrast imaging, or BOLD-contrast imaging, is a method used in functional magnetic resonance imaging (fMRI) to observe different areas of the brain or other organs, which are found to be active at any given time.

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Blood–brain barrier

The blood–brain barrier (BBB) is a highly selective semipermeable membrane barrier that separates the circulating blood from the brain and extracellular fluid in the central nervous system (CNS).

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Brain

The brain is an organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.

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Brain mapping

Brain mapping is a set of neuroscience techniques predicated on the mapping of (biological) quantities or properties onto spatial representations of the (human or non-human) brain resulting in maps.

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Brodmann area

A Brodmann area is a region of the cerebral cortex, in the human or other primate brain, defined by its cytoarchitecture, or histological structure and organization of cells.

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Caffeine

Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class.

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Calcium

Calcium is a chemical element with symbol Ca and atomic number 20.

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Capillary

A capillary is a small blood vessel from 5 to 10 micrometres (µm) in diameter, and having a wall one endothelial cell thick.

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Cardiac pacemaker

Image showing the cardiac pacemaker or SA node, the normal pacemaker within the electrical conduction system of the heart. The contraction of cardiac muscle (heart muscle) in all animals is initiated by electrical impulses known as action potentials.

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Caudate nucleus

The caudate nucleus is one of the structures that make up the dorsal striatum, which is a component of the basal ganglia.

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Cell signaling

Cell signaling (cell signalling in British English) is part of any communication process that governs basic activities of cells and coordinates all cell actions.

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Charles Scott Sherrington

Sir Charles Scott Sherrington (27 November 1857 – 4 March 1952) was an English neurophysiologist, histologist, bacteriologist, and a pathologist, Nobel laureate and president of the Royal Society in the early 1920s.

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Cingulate cortex

The cingulate cortex is a part of the brain situated in the medial aspect of the cerebral cortex.

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Classical conditioning

Classical conditioning (also known as Pavlovian or respondent conditioning) refers to a learning procedure in which a biologically potent stimulus (e.g. food) is paired with a previously neutral stimulus (e.g. a bell).

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Convolution

In mathematics (and, in particular, functional analysis) convolution is a mathematical operation on two functions (f and g) to produce a third function, that is typically viewed as a modified version of one of the original functions, giving the integral of the pointwise multiplication of the two functions as a function of the amount that one of the original functions is translated.

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Correlation and dependence

In statistics, dependence or association is any statistical relationship, whether causal or not, between two random variables or bivariate data.

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CT scan

A CT scan, also known as computed tomography scan, makes use of computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of specific areas of a scanned object, allowing the user to see inside the object without cutting.

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Default mode network

In neuroscience, the default mode network (DMN), also default network, or default state network, is a large scale brain network of interacting brain regions known to have activity highly correlated with each other and distinct from other networks in the brain.

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Dentate gyrus

The dentate gyrus is part of a brain region known as the hippocampus (part of the hippocampal formation).

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Diamagnetism

Diamagnetic materials are repelled by a magnetic field; an applied magnetic field creates an induced magnetic field in them in the opposite direction, causing a repulsive force.

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Diffusion MRI

Diffusion-weighted magnetic resonance imaging (DWI or DW-MRI) is the use of specific MRI sequences as well as software that generates images from the resulting data, that uses the diffusion of water molecules to generate contrast in MR images.

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Dorsolateral prefrontal cortex

The dorsolateral prefrontal cortex (DLPFC or DL-PFC) is an area in the prefrontal cortex of the brain of humans and non-human primates.

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Electrocorticography

Electrocorticography (ECoG), or intracranial electroencephalography (iEEG), is a type of electrophysiological monitoring that uses electrodes placed directly on the exposed surface of the brain to record electrical activity from the cerebral cortex.

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Electroencephalography

Electroencephalography (EEG) is an electrophysiological monitoring method to record electrical activity of the brain.

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Event-related functional magnetic resonance imaging

Event-related functional magnetic resonance imaging (efMRI) is a technique in magnetic resonance imaging that can be used to detect changes in the BOLD (Blood Oxygen Level Dependent) hemodynamic response to neural activity in response to certain events.

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Expectation–maximization algorithm

In statistics, an expectation–maximization (EM) algorithm is an iterative method to find maximum likelihood or maximum a posteriori (MAP) estimates of parameters in statistical models, where the model depends on unobserved latent variables.

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Experiment

An experiment is a procedure carried out to support, refute, or validate a hypothesis.

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Forward chaining

Forward chaining (or forward reasoning) is one of the two main methods of reasoning when using an inference engine and can be described logically as repeated application of modus ponens.

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Fourier inversion theorem

In mathematics, the Fourier inversion theorem says that for many types of functions it is possible to recover a function from its Fourier transform.

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Fourier transform

The Fourier transform (FT) decomposes a function of time (a signal) into the frequencies that make it up, in a way similar to how a musical chord can be expressed as the frequencies (or pitches) of its constituent notes.

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Frontal lobe

The frontal lobe, located at the front of the brain, is the largest of the four major lobes of the cerebral cortex in the mammalian brain.

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Functional neuroimaging

Functional neuroimaging is the use of neuroimaging technology to measure an aspect of brain function, often with a view to understanding the relationship between activity in certain brain areas and specific mental functions.

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Gaussian filter

In electronics and signal processing, a Gaussian filter is a filter whose impulse response is a Gaussian function (or an approximation to it).

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General linear model

The general linear model or multivariate regression model is a statistical linear model.

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Generalized linear model

In statistics, the generalized linear model (GLM) is a flexible generalization of ordinary linear regression that allows for response variables that have error distribution models other than a normal distribution.

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Genotoxicity

In genetics, genotoxicity describes the property of chemical agents that damages the genetic information within a cell causing mutations, which may lead to cancer.

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Habituation

Habituation is a form of learning in which an organism decreases or ceases its responses to a stimulus after repeated or prolonged presentations.

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Haemodynamic response

In haemodynamics, the body must respond to physical activities, external temperature, and other factors by homeostatically adjusting its blood flow to deliver nutrients such as oxygen and glucose to stressed tissues and allow them to function.

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Harvard University

Harvard University is a private Ivy League research university in Cambridge, Massachusetts.

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Hemodynamics

Hemodynamics or hæmodynamics is the dynamics of blood flow.

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Hemoglobin

Hemoglobin (American) or haemoglobin (British); abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells of all vertebrates (with the exception of the fish family Channichthyidae) as well as the tissues of some invertebrates.

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Hippocampus

The hippocampus (named after its resemblance to the seahorse, from the Greek ἱππόκαμπος, "seahorse" from ἵππος hippos, "horse" and κάμπος kampos, "sea monster") is a major component of the brains of humans and other vertebrates.

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Hippocampus proper

The hippocampus proper refers to the actual structure of the hippocampus which is made up of four regions or subfields.

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Ion transporter

In biology, an ion transporter (or ion pump) is a transmembrane protein that moves ions across a plasma membrane against their concentration gradient through active transport.

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Jean Talairach

Jean Talairach (January 15, 1911 – March 15, 2007) was a psychiatrist and neurosurgeon who practiced at the Sainte-Anne Hospital Center in Paris, and who is noted for the Talairach coordinates, which are relevant in stereotactic neurosurgery.

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Kenneth Kwong

Kenneth Kin Man Kwong is an American scientist born in Hong Kong.

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Lateral geniculate nucleus

The lateral geniculate nucleus (LGN; also called the lateral geniculate body or lateral geniculate complex) is a relay center in the thalamus for the visual pathway.

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Lie detection

Lie detection is an assessment of a verbal statement with the goal to reveal a possible intentional deceit.

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Linear model

In statistics, the term linear model is used in different ways according to the context.

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Linus Pauling

Linus Carl Pauling (February 28, 1901 – August 19, 1994) was an American chemist, biochemist, peace activist, author, educator, and husband of American human rights activist Ava Helen Pauling.

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List of neuroscience databases

A number of online neuroscience databases are available which provide information regarding gene expression, neurons, macroscopic brain structure, and neurological or psychiatric disorders.

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Lorentz force

In physics (particularly in electromagnetism) the Lorentz force is the combination of electric and magnetic force on a point charge due to electromagnetic fields.

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Magnetoencephalography

Magnetoencephalography (MEG) is a functional neuroimaging technique for mapping brain activity by recording magnetic fields produced by electrical currents occurring naturally in the brain, using very sensitive magnetometers.

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Markov random field

In the domain of physics and probability, a Markov random field (often abbreviated as MRF), Markov network or undirected graphical model is a set of random variables having a Markov property described by an undirected graph.

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McGill University Health Centre

The McGill University Health Centre (MUHC, Centre universitaire de santé McGill) is one of two major healthcare networks in the city of Montreal, Quebec, and it is the only bilingual teaching hospital in the province.

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Midbrain

The midbrain or mesencephalon (from Greek mesos 'middle', and enkephalos 'brain') is a portion of the central nervous system associated with vision, hearing, motor control, sleep/wake, arousal (alertness), and temperature regulation.

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Multiple comparisons problem

In statistics, the multiple comparisons, multiplicity or multiple testing problem occurs when one considers a set of statistical inferences simultaneously or infers a subset of parameters selected based on the observed values.

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Mutual information

In probability theory and information theory, the mutual information (MI) of two random variables is a measure of the mutual dependence between the two variables.

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Nature (journal)

Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.

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Near-infrared spectroscopy

Near-infrared spectroscopy (NIRS) is a spectroscopic method that uses the near-infrared region of the electromagnetic spectrum (from 780 nm to 2500 nm).

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Neuromarketing

Neuromarketing is a commercial marketing communication field that applies neuropsychology to marketing research, studying consumers' sensorimotor, cognitive, and affective response to marketing stimuli.

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Neuron

A neuron, also known as a neurone (British spelling) and nerve cell, is an electrically excitable cell that receives, processes, and transmits information through electrical and chemical signals.

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Nitric oxide

Nitric oxide (nitrogen oxide or nitrogen monoxide) is a colorless gas with the formula NO.

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Normal distribution

In probability theory, the normal (or Gaussian or Gauss or Laplace–Gauss) distribution is a very common continuous probability distribution.

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Paradigm

In science and philosophy, a paradigm is a distinct set of concepts or thought patterns, including theories, research methods, postulates, and standards for what constitutes legitimate contributions to a field.

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Paramagnetism

Paramagnetism is a form of magnetism whereby certain materials are weakly attracted by an externally applied magnetic field, and form internal, induced magnetic fields in the direction of the applied magnetic field.

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Parameter

A parameter (from the Ancient Greek παρά, para: "beside", "subsidiary"; and μέτρον, metron: "measure"), generally, is any characteristic that can help in defining or classifying a particular system (meaning an event, project, object, situation, etc.). That is, a parameter is an element of a system that is useful, or critical, when identifying the system, or when evaluating its performance, status, condition, etc.

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Parietal lobe

The parietal lobe is one of the four major lobes of the cerebral cortex in the brain of mammals. The parietal lobe is positioned above the temporal lobe and behind the frontal lobe and central sulcus. The parietal lobe integrates sensory information among various modalities, including spatial sense and navigation (proprioception), the main sensory receptive area for the sense of touch (mechanoreception) in the somatosensory cortex which is just posterior to the central sulcus in the postcentral gyrus, and the dorsal stream of the visual system. The major sensory inputs from the skin (touch, temperature, and pain receptors), relay through the thalamus to the parietal lobe. Several areas of the parietal lobe are important in language processing. The somatosensory cortex can be illustrated as a distorted figure – the homunculus (Latin: "little man"), in which the body parts are rendered according to how much of the somatosensory cortex is devoted to them.Schacter, D. L., Gilbert, D. L. & Wegner, D. M. (2009). Psychology. (2nd ed.). New York (NY): Worth Publishers. The superior parietal lobule and inferior parietal lobule are the primary areas of body or spacial awareness. A lesion commonly in the right superior or inferior parietal lobule leads to hemineglect. The name comes from the parietal bone, which is named from the Latin paries-, meaning "wall".

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Philosophy Now

Philosophy Now is a bimonthly philosophy magazine sold from news-stands and book stores in the United States, United Kingdom, Australia, and Canada; it is also available on digital devices, and online.

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Positron emission tomography

Positron-emission tomography (PET) is a nuclear medicine functional imaging technique that is used to observe metabolic processes in the body as an aid to the diagnosis of disease.

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Power (statistics)

The power of a binary hypothesis test is the probability that the test correctly rejects the null hypothesis (H0) when a specific alternative hypothesis (H1) is true.

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Precautionary principle

The precautionary principle (or precautionary approach) generally defines actions on issues considered to be uncertain, for instance applied in assessing risk management.

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Prefrontal cortex

In mammalian brain anatomy, the prefrontal cortex (PFC) is the cerebral cortex which covers the front part of the frontal lobe.

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Primary motor cortex

The primary motor cortex (Brodmann area 4) is a brain region that in humans is located in the dorsal portion of the frontal lobe.

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Primary somatosensory cortex

The primary somatosensory cortex is located in the postcentral gyrus, and is part of the somatosensory system.

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Pulvinar nuclei

The pulvinar nuclei or nuclei of the pulvinar (nuclei pulvinares) are the nuclei (cell bodies of neurons) located in the thalamus (a part of the vertebrate brain).

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Putamen

The putamen is a round structure located at the base of the forebrain (telencephalon).

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Randomization

Randomization is the process of making something random; in various contexts this involves, for example.

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Recognition memory

Recognition memory, a subcategory of declarative memory, is the ability to recognize previously encountered events, objects, or people.

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Red blood cell

Red blood cells-- also known as RBCs, red cells, red blood corpuscles, haematids, erythroid cells or erythrocytes (from Greek erythros for "red" and kytos for "hollow vessel", with -cyte translated as "cell" in modern usage), are the most common type of blood cell and the vertebrate's principal means of delivering oxygen (O2) to the body tissues—via blood flow through the circulatory system.

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Remember versus know judgements

There is evidence suggesting that different processes are involved in remembering something versus knowing whether it is familiar.

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Resting state fMRI

Resting state fMRI (rsfMRI or R-fMRI) is a method of functional magnetic resonance imaging (fMRI) that is used in brain mapping to evaluate regional interactions that occur in a resting or task-negative state, when an explicit task is not being performed.

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Rhesus macaque

The rhesus macaque (Macaca mulatta) is one of the best-known species of Old World monkeys.

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Seiji Ogawa

Seiji Ogawa (小川 誠二 Ogawa Seiji, born January 19, 1934) is a Japanese researcher known for discovering the technique that underlies Functional Magnetic Resonance Imaging (fMRI).

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Signal enhancement by extravascular water protons

Signal enhancement by extravascular water protons, or SEEP, is a contrast mechanism for functional magnetic resonance imaging (fMRI), which is an alternative to the more commonly employed BOLD (blood-oxygen-level dependent) contrast.

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Signal-to-noise ratio

Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.

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Spectral density

The power spectrum S_(f) of a time series x(t) describes the distribution of power into frequency components composing that signal.

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Spinal cord

The spinal cord is a long, thin, tubular bundle of nervous tissue and support cells that extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.

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Stanford University

Stanford University (officially Leland Stanford Junior University, colloquially the Farm) is a private research university in Stanford, California.

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Statistical classification

In machine learning and statistics, classification is the problem of identifying to which of a set of categories (sub-populations) a new observation belongs, on the basis of a training set of data containing observations (or instances) whose category membership is known.

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Stefano Sandrone

Stefano Sandrone (1988) is an Italian neuroscientist and a Teaching Fellow at Imperial College London.

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Subiculum

The subiculum (Latin for "support") is the most inferior component of the hippocampal formation.

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Supplementary motor area

The supplementary motor area (SMA) is a part of the primate cerebral cortex that contributes to the control of movement.

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Synapse

In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target efferent cell.

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Temporal lobe

The temporal lobe is one of the four major lobes of the cerebral cortex in the brain of mammals.

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Tesla (unit)

The tesla (symbol T) is a derived unit of magnetic flux density (informally, magnetic field strength) in the International System of Units.

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Thalamus

The thalamus (from Greek θάλαμος, "chamber") is the large mass of gray matter in the dorsal part of the diencephalon of the brain with several functions such as relaying of sensory signals, including motor signals, to the cerebral cortex, and the regulation of consciousness, sleep, and alertness.

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Thulium

Thulium is a chemical element with symbol Tm and atomic number 69.

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Transcranial magnetic stimulation

Transcranial magnetic stimulation (TMS) is a method in which a changing magnetic field is used to cause electric current to flow in a small region of the brain via electromagnetic induction.

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University of Cambridge

The University of Cambridge (informally Cambridge University)The corporate title of the university is The Chancellor, Masters, and Scholars of the University of Cambridge.

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Variable and attribute (research)

In science and research, attribute is a characteristic of an object (person, thing, etc.).Earl R. Babbie, The Practice of Social Research", 12th edition, Wadsworth Publishing, 2009,, p. 14-18 Attributes are closely related to variables.

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Vasodilation

Vasodilation is the widening of blood vessels.

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Vein

Veins are blood vessels that carry blood toward the heart.

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Visual cortex

The visual cortex of the brain is a part of the cerebral cortex that processes visual information.

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Voxel

A voxel represents a value on a regular grid in three-dimensional space.

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William James

William James (January 11, 1842 – August 26, 1910) was an American philosopher and psychologist, and the first educator to offer a psychology course in the United States.

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References

[1] https://en.wikipedia.org/wiki/Functional_magnetic_resonance_imaging

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