Anatomy and Cell Biology 3309 Lecture Notes - Lecture 14: Brainstem, Autonomic Nervous System, Ependyma
28 Dec 2017
School
Department
Professor
Document Summary
Spinal cord is part of the cns while the nerves are the pns. It can be divided into different sections: cervical section: most upper section, thoracic section, lumbar section, sacral section. Spinal cord column is divided according to how the vertebral column is divided: spinal cord ends at the beginning of the lumbar segment. Downwards from the lumbar area, the spinal cord is the cauda equina. Spinal cord as a solid column only runs in the two upper sections (cervical and thoracic) of the vertebrae column: after that it is a bundle of nerves and not a solid column anymore = cauda equine. Segmentation of the spinal cord is according to where the nerves leave the vertebrae column in order to go to different parts of the body. Ventral roots: efferent nerve fibers: large motor neurons are located in the ventral horn. Spinal cord is embedded in bony structures and is protected by the vertebrae.
