A nerve is an enclosed, cable-like bundle of axons (nerve fibers, the long and slender projections of neurons) in the peripheral nervous system. source
A nerve is an enclosed, cable-like bundle of axons (nerve fibers, the long and slender projections of neurons) in the peripheral nervous system.
A nerve provides a common pathway for the electrochemical nerve impulses. source
A nerve provides a common pathway for the electrochemical nerve impulses.
A nerves are transmitted along each of the axons to peripheral organs. source
A nerves are transmitted along each of the axons to peripheral organs.
In the central nervous system, the analogous structures are known as tracts. source
In the central nervous system, the analogous structures are known as tracts.
Neurons are sometimes called nerve cells, though this term is potentially misleading since many neurons do not form nerves, source
Neurons are sometimes called nerve cells, though this term is potentially misleading since many neurons do not form nerves,
Nerves include non-neuronal Schwann cells that coat the axons in myelin. source
Nerves include non-neuronal Schwann cells that coat the axons in myelin.
Each nerve is a cordlike structure containing bundles of axons. source
Each nerve is a cordlike structure containing bundles of axons.
Within a nerve, each axon is surrounded by a layer of connective tissue called the endoneurium. source
Within a nerve, each axon is surrounded by a layer of connective tissue called the endoneurium.
The entire nerve is wrapped in a layer of connective tissue called the epineurium. source
The entire nerve is wrapped in a layer of connective tissue called the epineurium.
Nerves are categorized into three groups based on the direction that signals are conducted. source
Nerves are categorized into three groups based on the direction that signals are conducted.
Afferent nerves conduct signals from sensory neurons to the central nervous system, for example from the mechanoreceptors in skin. source
Afferent nerves conduct signals from sensory neurons to the central nervous system, for example from the mechanoreceptors in skin.
Efferent nerves conduct signals from the central nervous system along motor neurons to their target muscles and glands. source
Efferent nerves conduct signals from the central nervous system along motor neurons to their target muscles and glands.
Mixed nerves contain both afferent and efferent axons. source
Mixed nerves contain both afferent and efferent axons.
Nerves can be categorized into two groups based on where they connect to the central nervous system. source
Nerves can be categorized into two groups based on where they connect to the central nervous system.
Spinal nerves innervate (distribute to/stimulate) much of the body, and connect through the spinal column to the spinal cord and thus to the central nervous system. source
Spinal nerves innervate (distribute to/stimulate) much of the body, and connect through the spinal column to the spinal cord and thus to the central nervous system.
Cranial nerves innervate parts of the head, and connect directly to the brain (especially to the brainstem). source
Cranial nerves innervate parts of the head, and connect directly to the brain (especially to the brainstem).
Sensory nerves conduct sensory information from their receptors to the central nervous system, where the information is then processed. source
Sensory nerves conduct sensory information from their receptors to the central nervous system, where the information is then processed.
Motor nerves conduct signals from the central nervous system to muscles, thus they are synonymous with efferent nerves. source
Motor nerves conduct signals from the central nervous system to muscles, thus they are synonymous with efferent nerves.
