BIOL 030 Lecture Notes - Lecture 3: Trapezius Muscle, Spinal Canal, Cauda Equina
16 Sep 2020
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Document Summary
Each branch of the spinal nerve is still a mixed nerve. Dorsal primary ramus innervates skin and muscles of back. Ventral primary ramus innervates all other skin and muscles (trunk, limbs, etc. ) Is much bigger because it innervates more things. Numbering all spinal nerves (except the cervical ones) exit below the vertebra they are named after (ex. Exception c1 spinal nerve exits above vc1, c2 spinal nerve exits below vc1. Spinal cord segment portion of spinal cord that contributed to the formation of the spinal nerve. Vertebral level anatomical landmark that is associated with a specific vertebrae. At birth spinal cord and vertebral column end at. Dermatome area of skin supplied by a single spinal nerve same place, but vertebra grows. Lumbar puncture done in area of cauda equina so that spinal cord is not affected. This allows for csf to be sampled from the dural sac. Define the normal and basic pathological spinal (postural) curvatures.
