Anatomy and Cell Biology 3319 Lecture Notes - Lecture 14: Intervertebral Foramina, Brachial Plexus, Cervical Vertebrae

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Acb lecture 14 spinal nerves & brachial plexus: weakness finger extension, numbness dorsal radial hand, paralysis wrist extensors, paralysis wrist supination https://www. youtube. com/watch?v=nyt7yzp2wv0. Vertebral column: bony(cid:9)framework(cid:9)of(cid:9)spinal(cid:9)cord, vertebrae(cid:9)surround(cid:9)the(cid:9)spinal(cid:9)cord, cervical,(cid:9)thoracic,(cid:9)lumbar,(cid:9)sacral(cid:9)&(cid:9)coccygeal ( r e v i e w ) Spinal canal houses the spinal cord: vertebrae protects the spinal cord from impact. Spinal nerves: peripheral(cid:9)nervous(cid:9)system, mixed(cid:9)nerves(cid:9)carrying(cid:9)motor(cid:9)and(cid:9) sensory(cid:9)information(cid:9)between(cid:9)spinal(cid:9) cord(cid:9)and(cid:9)body(cid:9, 31 pairs(cid:9)of(cid:9)nerves, pns we left brain & spinal cord and are now in rest of body. 1 coccygeal 1: have 1 less cervical vertebrae than we have spinal nerve, 31 spinal nerves & 30 vertebrae. Cervical(cid:9)nerves(cid:9)exit(cid:9) above the(cid:9)corresponding(cid:9) vertebrae: when spinal nerves are exiting, they exit through intervertebral foramen which is right in. Ventral(cid:9)ramus: have incoming sensory info and put out motor response. Instead were looking at where in the body that spinal nerve is sending innervation to: so spinal nerve divides into dorsal rami and ventral rami. Spinal cord anatomy: dorsal(cid:9)rami:(cid:9)deep(cid:9)back(cid:9) muscles(cid:9)and(cid:9)skin, ventral(cid:9)rami:(cid:9)limbs(cid:9)and(cid:9) trunk(cid:9)(form(cid:9)plexuses, dorsal(cid:9)root(cid:9)ganglion:(cid:9)cell(cid:9) body(cid:9)of(cid:9)sensory(cid:9)neurons(cid:9) (cell(cid:9)body(cid:9)of(cid:9)motor(cid:9) neurons(cid:9)in(cid:9)ventral(cid:9)horn(cid:9)of(cid:9) spinal(cid:9)cord)(cid:9)

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