intersegmental

These cells and their processes constitute a series of association or intersegmental neurons (Fig. 668), which link together the different parts of the medulla spinalis.

IX. Neurology. 3. The Spinal Cord or Medulla Spinalis 1918

These descending fibers are mainly intersegmental in character and derived from cells in the posterior column, but some consist of the descending branches of the posterior nerve roots.

IX. Neurology. 3. The Spinal Cord or Medulla Spinalis 1918

The long intersegmental fibers begin to appear about the third month and the cerebrospinal fibers about the fifth month.

IX. Neurology. 2. Development of the Nervous System 1918

It consists of (a) longitudinal intersegmental fibers which arise from cells in the gray substance, more especially from those of the medial group of the anterior column, and, after a longer or shorter course, reënter the gray substance; (b) fibers which cross in the anterior white commissure from the gray substance of the opposite side.

IX. Neurology. 3. The Spinal Cord or Medulla Spinalis 1918

It is usually regarded as being formed by some of the fibers of the posterior nerve roots, which ascend for a short distance in the tract and then enter the posterior column, but since its fibers are myelinated later than those of the posterior nerve roots, and do not undergo degeneration in locomotor ataxia, they are probably intersegmental in character.

IX. Neurology. 3. The Spinal Cord or Medulla Spinalis 1918

The first to develop are the short intersegmental fibers from the neuroblasts in the mantle zone, and the fibers of the dorsal nerve roots which grow into the medulla spinalis from the cells of the spinal ganglia.

IX. Neurology. 2. Development of the Nervous System 1918

These are separated from one another by intersegmental septa and are arranged symmetrically on either side of the neural tube and notochord: to every segment a spinal nerve is distributed.

II. Osteology. 1. Development of the Skeleton 1918

The vertebral and costal arches are derivatives of the posterior part of the segment in front of the intersegmental septum with which they are associated.

II. Osteology. 1. Development of the Skeleton 1918

Its connections are imperfectly known, but it consists largely of ascending and descending intersegmental or association fibers, which connect the nuclei of the hind-brain and mid-brain to each other.

IX. Neurology. 4b. The Mid-brain or Mesencephalon 1918

It consists chiefly of intersegmental fibers which arise from cells in the gray substance, and, after a longer or shorter course, reënter the gray substance and ramify in it.

IX. Neurology. 3. The Spinal Cord or Medulla Spinalis 1918