Anterior Arm, Posterior Forearm, Dorsal Hand Flashcards
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3
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- What are the 2 muscles that are shown?
- What are their actions?
- What are their innervations?
A
- Biceps brachii and brachialis
- BB = flexion of arm at shoulder and supination of forearm at elbow
- Brachialis = flexion of forearm at elbow
- Both innervated by musculocutaneous nerve
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5
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- What muscles are shown?
- What are their actions?
- What are their innervations?
A
- Pectoralis major (adduction shoulder)
- Coracobrachialis (flexion arm at shoulder)
- CB - musculocutaneous nerve
- PMaj - medial and lateral pectoral nerves
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11
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- Pronation and supination of the forearm occur at what location(s)?
- Describe the motion at this location(s).
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- The elbow and the wrist.
- At both joints, radius moves while ulna is fixed. At elbow, radial head spins while at distal joint it rotates nearly 180 degrees around the ulna.
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