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ANT 3100: Chapter 12 (PT 2)
Spinal Cord and Spinal Nerves
15
Anatomy
Undergraduate 1
11/10/2012

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Term
origination of brachial plexus
Definition
from spinal nerves C5 - T1
Term
5 major branches of the brachial plexus
Definition
1) musculocutaneous 4) axillary
2) median 5) radial nerves
3) ulnar
Term
sensory function of musculocutaneous
Definition
supplies skin on lateral surface of forearm
Term
sensory function of ulnar nerve
Definition
supplies skin on little finger, medial half of the ring finger, and medial third of the hand
Term
sensory function of axillary nerve
Definition
supplies skin on lateral shoulder
Term
sensory function of radial nerve
Definition
supplies skin on posterior surface of arm and forearm and skin on posterolateral surface of hand
Term
origination of lumbosacral plexus
Definition
from spinal nerves L1-S4
Term
5 major branches of lumbosacral plexus
Definition
1) obturator 4) tibial
2) femoral 5) fibular
3) sciatic
Term
sensory function of obturator
Definition
supplies skin on medial thigh (groin)
Term
sensory function of femoral nerve
Definition
supplies skin on anterior thigh and medial leg
Term
sensory function of sciatic nerve
Definition
none
Term
sensory function of tibial nerve
Definition
branches of the tibial nerve supply the skin on the posterior leg, the lateral surface of the foot, and the sole of the foot
Term
sciatic nerve is formed by
Definition
the tibial nerve and common fibular nerve
Term
the common fibular nerve divides to form
Definition
the superficial fibular nerve and deep fibular nerve
Term
sensory function of common fibular nerve
Definition
supplies skin on lateral portion of knee, skin on anterolateral leg, and dorsum of foot
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