Section of the medulla oblongata through the lower part of the decussation of the pyramids.
1. Anterior median fissure.
2. Posterior median sulcus.
3. Anterior column (in red), with 3’, anterior root.
4. Posterior column (in blue), with 4’, posterior roots.
5. Lateral cerebrospinal fasciculus.
6. Posterior funiculus. The red arrow, a, a’, indicates the course the lateral cerebrospinal fasciculus takes at the level of the decussation of the pyramids; the blue arrow, b, b’, indicates the course which the sensory fibers take.
|Latin||f. posterior medullae spinalis|
The posterior funiculus of the spinal cord lies between the posterolateral and the posterior median sulcus. This area includes the posterior columns (also called the dorsal columns) of white matter which contain the fasciculus gracilis and, higher in the body, the fasciculus cuneatus, which are separated by a partition of glial cells. Histologically, these two fasciculi are on either side of the posterior intermediate sulcus.
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