Alpha motor neuron and Reflex arc

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Difference between Alpha motor neuron and Reflex arc

Alpha motor neuron vs. Reflex arc

Alpha (α) motor neurons (also called alpha motoneurons), are large, multipolar lower motor neurons of the brainstem and spinal cord. A reflex arc is a neural pathway that controls a reflex.

Action potential

In physiology, an action potential occurs when the membrane potential of a specific axon location rapidly rises and falls: this depolarisation then causes adjacent locations to similarly depolarise.

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Anterior grey column

The anterior grey column (also called the anterior cornu, anterior horn of spinal cord or ventral horn) is the front column of grey matter in the spinal cord.

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Chemical synapse

Chemical synapses are biological junctions through which neurons' signals can be exchanged to each other and to non-neuronal cells such as those in muscles or glands.

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Muscle spindle

Muscle spindles are stretch receptors within the body of a muscle that primarily detect changes in the length of the muscle.

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Patellar reflex

The patellar reflex or knee-jerk (myotatic) (monosynaptic) (American spelling knee reflex) is a stretch reflex which tests the L2, L3, and L4 segments of the spinal cord.

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Quadriceps femoris muscle

The quadriceps femoris (also called the quadriceps extensor, quadriceps or quads), is a large muscle group that includes the four prevailing muscles on the front of the thigh.

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Reflex

A reflex, or reflex action, is an involuntary and nearly instantaneous movement in response to a stimulus.

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Sensory neuron

Sensory neurons also known as afferent neurons are neurons that convert a specific type of stimulus, via their receptors, into action potentials or graded potentials.

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Somatic nervous system

The somatic nervous system (SNS or voluntary nervous system) is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.

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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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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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