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12 Cards in this Set
- Front
- Back
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All the muscles in the upper limb are innervated by....
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The ventral rami of the spinal cord segments C5-T1
Except - Trapezius CN XI (spinal accessory nerve from dorsal ramus) |
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What are the major nerves of the upper limb?
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Radial
Musculocutaneous Median Ulnar Axillary |
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What nerves innervate the radial nerve?
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C5, C6, C7, C8, T1 (posterior cord)
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Where does the radial nerve innervate?
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Motor: posterior arm and posterior forearm
Sensory: from skin on the back of the arm, forearm and hand |
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What happens when the radial nerve is damaged?
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No elbow, wrist, finger and thumb extension
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What nerves innervate the musculocunateous nerve?
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C5, C6, C7 (lateral cord)
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Where does the musculocutaneous nerve innervate?
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Motor: flexor compartment of the arm
Sensory: lateral forearm |
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What nerves innervate the median nerve?
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C5, C6, C7, C8, T1 (medial and lateral cords)
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Where does the median nerve innervate?
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Motor: Flexor forearm compartment
Motor: Thenar muscles of hand Motor: Lumbricals 1 & 2 Sensory: palm, thumb and 1st two fingers or lateral 3 1/2 fingers on palm |
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What are the nerves that innervate the ulnar?
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C8 and T1 (medial cord)
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What muscles are innervated by the ulnar nerve?
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Motor: Interosseous muscles and Hypothenar muscles
Sensory: little finger and half of ring finger or medial 1 1/2 fingers on palm |
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How many spinals nerves are there?
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31 pairs - 8 cervical, 12 thoracic, 5 lumbar, 5 sacral
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