Spinal Cord And ANS Flashcards
How many spinal nerves
8, 12,5,5,1
What is the spinal cord continuous with
Medulla oblongata
What are the two enlargements
Cervical and lumbosacral
Where does the spinal cord terminate
L1 L2
Why is there more white matter at higher spinal cord levels
All info from whole body must past through cervical region to access brain
What are the nerve plexii levels
Cervical C1-4
Brachial C5-T1
Lumbar T12-L5
Sacral L4-S4
What roots supply which trunks of brachial plexus
S:C5-6
M:C7
I:C8 T1
What does the lateral cord supply
Median nerve and musculocutaneous nerve
What does the posterior cord supply
Axillary and radial
What does medial cord supply
Median and ulnar nerves
What divisions of nerves supply extensors and what supply flexors
Posterior for extensors
Anterior for flexors
Radial
Axillary
Musculocutaneous
Median
Ulnar
Posterior arm, forearm and hand
Axillary deltoid and skin over deltoid
Musculocutaneous Anterior compartment of arm, lateral aspect of forearm
Median - most muscles of the forearm, few muscles in the hand and skin on palm
Ulnar 1.5 muscles in forearm, most muscles in the hand, medial 1.5 digits of hand
Which cranial nerves have parasympathetic component
III, VII, IX, X
What does vagus nerve send parasympathetic innervation to
Everything below neck till midgut
Where does sacral parasympathetic innervation go to
LI, bladder and reproductive organs
