Applied Functional Anatomy Chapter 2 Slides

Axon

conducts information away from the cell body

Dendrites

conducts information away from the cell body

Fascicles

bundles of axons

Central Nervous System (CNS)

made up of the brain and spinal cord

Peripheral Nervous System (PNS)

outside of the brain and spinal cord

Endoneurim

wraps around each axon

Perineurim

wraps around each fascicle

Epineurium

wraps around groups of fascicles (nerves)

Spinal Nerves

connected to the peripheral nerves to the CNS, 31 pairs (Cervical [8], Thoracic [12], Lumbar [5], Sacral [5], Coccygeal [1])

Exit Above

vertebrae C1-C7

Exit Below

vertebrae C8-L5

Dermatome

area of skin that is supplied by an individual spinal nerve (used to assess the level of SCI)

Brachial Plexus

ventral rami of C5-T1, coverage from trunks, separate into divisions, merge into cords, form terminal branches (roots -> trunks -> divisions -> cords -> branches)

Axillary Artery

a key landmark for the brachial plexus

Musculocutaneous

a branch of the lateral cord that is formed from the spinal nerves (C5-C7)

Median

originates from the lateral and medial cords, forming C6-T1

Redial

originates from the posterior cord and its terminal branches

Ulnar

a key terminal branch, originating in the medial cord and composed of fibers (forming C8 and T1)