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UB ANA 113 Lec 15 A
Peripheral Nervous System Lec
| Question | Answer |
|---|---|
| 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 |
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