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25 Cards in this Set
- Front
- Back
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how many intrinsic muscles are in the hand? |
19 |
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all of the intrinsic muscles of the hand are located where?
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on the palmar surface
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what is the main nerve to the intrinsic muscles of the hand? |
ulnar nerve |
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how many of the intrinsic muscles of the hand are innervated by the medial nerve?
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5 |
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fleshy mound located at the base of the first digit |
thenar eminence |
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what are the 3 muscles of the thenar eminence? |
abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis |
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what nerve innervates the muscles of the thenar eminence?
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median nerve |
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fleshy mound located at the base of the fifth digit
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hypothenar eminence
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what are the 3 muscles of the hypothenar eminence? |
abductor digiti minimi, flexor digiti minimi brevis, and opponens digiti minimi |
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what nerve innervates the 3 muscles of the hypothenar eminence?
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ulnar nerve |
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the "earthworm" muscles of the hand
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lumbricals
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what is the origin of the 4 lumbrical muscles?
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off of the tendon of the flexor digitorum profundus |
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these muscles place the digits in the writing position |
lumbricals |
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what lumbrical muscles are innervated by the median nerve?
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1 and 2
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what lumbricle muscles are innervated by the ulnar nerve?
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3 and 4 |
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what are the actions of the lumbricals?
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flex MP joints 2-5 and extend IP joints 2-5 |
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how many interosseous muscles are there?
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7 |
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where are the interosseous muscles located?
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between the metacarpal bones |
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what are the 3 interosseous muscles closer to the palm side called
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palmar interossei |
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what is the action of the palmar interossei? |
adducts digits |
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what is the action of the dorsal interossei? |
abducts digits |
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all of the interosseous muscles are innervated by what nerve? |
ulnar nerve |
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this muscle is important for adduction of your thumb
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adductor pollicis |
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this muscle is very superficial, inserts into the skin, and helps aide in grasping things |
palmaris brevis |
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what 2 things make the carpal tunnel? |
flexor retinaculum and carpal bones |
