segment of the spinal cord

Each segment of the spinal cord receives sensory input from a particular region of the body.

The sympathetic fibers originate from the lower thoracic and upper lumbar segments of the spinal cord.

Parasympathetic fibers from the pelvic segments of the spinal cord supply the internal sphincter.

Here, the syrinx or cyst develops in a segment of the spinal cord damaged by one of these conditions.

The synapse between the afferent and efferent limbs occurs in the lowest sacral segments of the spinal cord.

The supralumbar segments of the spinal cord are the most effective site for 5-HT to induce locomotion in the neonatal rat.

As in the brainstem, higher segments of the spinal cord contain α-MNs that innervate muscles higher on the body.

The fibers that form the spinal accessory nerve are formed by lower motor neurons located in the upper segments of the spinal cord.

Each muscle in the body is supplied by a one or more levels or segments of the spinal cord and by their corresponding spinal nerves.

It is found in the thoracic segments of the spinal cord between the anterior gray column and the posterior gray column.

He described two types of partial lesions, one confined to a segment of the spinal cord, the other extending longitudinally in one of its columns.

The solitary tract is surrounded by the nucleus of the solitary tract, and descends to the upper cervical segments of the spinal cord.

As mentioned previously, the preganglionic cells of the SNS are located between the first thoracic segment and third lumbar segments of the spinal cord.

Action potentials carried by sensory neurons from stretch receptors in the urinary bladder wall travel to the sacral segments of the spinal cord through the pelvic nerves.

Cranial nerves are nerves that emerge directly from the brain, in contrast to spinal nerves, which emerge from segments of the spinal cord.

Each segment of the spinal cord is associated with a pair of ganglia, called dorsal root ganglia, which are situated just outside of the spinal cord.

In mammals, locomotor CPGs are organized in the lumbar and cervical segments of the spinal cord, and are used to control rhythmic muscle output in the arms and legs.

This longitudinal feedback occurs both because of direct projections of lumbar neurons to cervical neurons, but also because of intermediate projections throughout the thoracic segments of the spinal cord.

Table 1and Figures 2, 3and 4display the means and standard errors of numbers of labeled neurons found in the L1-L2 and L6-S1 segments of the spinal cord as a function of incubation time.

The lateral horn is only present in certain segments of the spinal cord (cervical and superior lumbar segments), where it contains neurons innervating limb muscles, preganglionic cell bodies of the autonomic nervous system, and sensory relay neurons.

In this theory, he stated that the spinal cord is comprised by a chain of units that functions as an independent reflex arcs, and their activity integrates sensory and motor nerves at the segment of the spinal cord from which these nerves originate.

A careful study with A.W. Campbell enabled him to demonstrate the zones of skin affected by disease and from this he could chart the cutaneous distribution of different fibres originating from cells of each ganglion and reaching the corresponding segment of the spinal cord.

Sympathetic nerves originate inside the vertebral column, toward the middle of the spinal cord in the intermediolateral cell column (or lateral horn), beginning at the first thoracic segment of the spinal cord and are thought to extend to the second or third lumbar segments.

Since the septum transversum is located initially opposite cervical segments of three to five, and since muscle cells for the diaphragm originate from somites at these segments, the phrenic nerve also arises from these segments of the spinal cord (C3, 4, and 5 keeping the diaphragm alive).