ANAT 215 Lecture Notes - Lecture 6: Myelin, Filum Terminale, Cerebral Cortex
18 Aug 2016
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Anatomy 215 (reading material; chapter 14: pages 368-374) Peripheral nervous system; 12 cranial nerves and 31 spinal nerves. Vertebral column/spine; bony skeletal structure (formed by vertebrae) Vertebral canal; space in the vertebrae, passage for the spinal cord. Segment identified by a letter and a number designation (c3 is the 3rd cervical segment) Posterior median septum; extension of the pia mater to separate posterior half. Foramen magnum: entry point into the skull. Length and diameter: length; 45cm (18 inches, diameter; varies according to the level. Conus medullaris: inferior end of the spinal cord at the second lumbar vertebra. Cervical: supplies the upper limb muscles: seen in the cervical segment c5-t1, brachyoplexis will supply motor and sensory innervation to the upper limbs. Cauda equina: spinal nerves have to travel all the way down the vertebral canal to exit through their respective foramen. At the tip of the conus medullaris, you"ll see a plexus of veins, like a horse tail.
