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UB ANA 113 Lec 15 A

Peripheral Nervous System Lec

peripheral nervous system includes spinal nerves and cranial nerves. Connects CNS to the areas of the body
What forms a spinal nerve? Dorsal(sensory) and ventral (motor) roots.
What does a spinal nerve split into? Dorsal (posterior) and ventral(anterior) primary ramus
Dermatome area of skin supplied by a spinal/cranial nerve
Which spinal nerve does not participate in innervating dermatomes? C1
Which cranial nerve participates in innervating dermatomes? CN V - trigeminal
Which spinal nerve supplies the dermatome across the nipples? T4
Which spinal nerve supplies the dermatome across the belly button(umbilicus)? T10
How is it possible to lose total sensation at a dermatome? the nerve that supplies the dermatome and the ones above and below must be damaged
Referred pain pain at an organ interpreted as coming from another area that also arises from a common nerve pathway. Ex heart pain perceived as coming from skin
What are the peripheral nerve plexuses? Cervial C1-C4, Brachial C5-T1, Lumbar T12-L4, Sacral L4-S4
The most important nerve arising fromo the cervical plexus... phrenic nerve - C3 C4 C5 ... controls diaphram ... keep you alive
Created by: HugsAndKisses



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