ANAT 321 Lecture Notes - Lecture 6: Cauda Equina, David Ragsdale, Posterior Column

• School: McGill University
• Department: Anatomy and Cell Biology
• Course: ANAT 321
• Professor: David Ragsdale

Document Summary

In embryos, the spinal cord and the spine are the same length. As we grow, the spine elongates but the spinal cord does not, leading to the spinal cord which is shorter than the spine and the formation of the cauda equina and the caudal cistern. Groove that divides the left dorsal column of the spinal cord from the right dorsal column. In pons, widens to form the fourth ventricle. Groove that separate the medial dorsal column (fasciculus gracilis) from the lateral dorsal column (fasciculus cuneatus). Location of, among other things, the cell bodies of the secondary pain/temperature neurons which project to the contralateral side. Entrance point more ventral/lateral in the dorsal horn that corresponds to the entrance of pain and temperature afferents. Lighter in colour when staining for myelin due to a and c fibers. Pale band at the base of lissauer"s tract that contain a lot of the cell bodies of secondary pain/temperature neurons.