Anatomy and Cell Biology 3319 Lecture Notes - Lecture 21: Anterior Grey Column, Posterior Grey Column, Intervertebral Foramina
4 Nov 2016
School
Department
Professor
Document Summary
Nov 3 spinal nerves and brachial plexus. Pns all nervous tissue outside cns, spinal and cranial nerves. Sensory/afferent carry info from body to cns (ex skin: motor/efferent innervate voluntary muscle and carry info from cns to body. Spinal cord surrounded and protected by vertebral column: cervical* - 7. Named c1-c7 (top bottom: thoracic 12. Exit the vertebral column between adjacent vertebrae through the intervertebral foramen. Name based on vertebral level they exit. E(cid:454)it a(cid:271)o(cid:448)e (cid:448)erte(cid:271)rae the(cid:455)"re (cid:374)a(cid:373)ed after (cid:894)c(cid:1006) (cid:374)er(cid:448)e (cid:449)ill lea(cid:448)e through c1-c2), (between c7-t1 c8 spinal nerve) 7 cervical vertebrate but 8 spinal nerves. Thoracic spine downwards, spinal nerve comes out below the one it is named after (t3 and t4 spinal nerve that comes out between is t3) Motor nerves come from ventral horn of sc and exit as ventral rootlets. Converge to make ventral root culmination of all ventral rootlets coming together this ventral root comes together with dorsal root to make spinal nerve (mixed nerve)
