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Foundations > Hand > Flashcards

Hand Flashcards

1
Q

Cutaneous innervation in hand

A

ulnar, median, radial nn

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2
Q

dermatomes of hand

A

Anterior: C6, C7, C8
Posterior: C7, C8

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3
Q

Carpal Tunnel Framework

A

formed by the arching alignment of the carpal bones and the thick flexor retinaculum (transverse carpal ligament)

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4
Q

fascia of hand

A

palmar fascia is thin over thenar and hypothenar eminences
thick centrally forming palmar aponeurosis and in the fingers forming the digital sheaths

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5
Q

Dupuytren’s Contracture/Disease

A

Palmar node, usually 4th or 2nd digit at MCP joint then the proximal IP joint
Dupuytren’s Diathesis is more aggressive form
trauma and occupationally acquired: repeated blows to palm and occupational stress
hands get stuck in contracture and lose range of motion

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6
Q

Palmaris Brevis

A

Origin: palmar aponeurosis and flexor retinaculum
Insertion: dermis of skin
Inn: superficial branch of ulnar n
Action: improves grip

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7
Q

Abductor Pollicis Brevis

A

Inn: Recurrent branch of median n
Action: abducts pollex, helps with opposition

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8
Q

Flexor Pollicis Brevis

A

Inn: recurrent branch of median n
Action: flexes pollex

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9
Q

Opponens Pollicis

A

Inn: recurrent branch of median n
Action: opposes pollex toward center of palm and rotates it medially
thumbs to fingers

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10
Q

Abductor Digiti Minimi

A

Origin: pisiform
Insertion: digit 5
Inn: deep branch of ulnar n
Action: abducts digit 5, assists in flexion of proximal phalanx

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11
Q

Flexor Digiti Minimi Brevis

A

Origin: hook of hamate, flexor retinaculum
Insertion: digit 5
Inn: deep branch of ulnar n
Action: flexes digit 5

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12
Q

Opponens Digiti Minimi

A

Origin: hook of hamate, flexor retinaculum
Insertion: palmar surface of 5th metacarpal
Inn: deep branch of ulnar n
Action: draws 5th metacarpal anteriorly and rotates it, brings digit 5 into opposition with pollex

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13
Q

Adductor Pollicis

A

Origin: oblique head: bases of 2nd and 3rd metacarpals
transverse head: ant. surface of body of 3rd metacarpal
Insertion: Base of prox. phalanx of pollex
Innervation: deep branch of ulnar n
Actions: adducts pollex

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14
Q

Lumbrical Muscles

A

Origin: tendons of flexor digitorum profundus m
Insertion: Lateral sides of extensor expansion (digits 2-5)
Inn: median n (lumbricals 1-2)
Deep branch of ulnar n (lumbricals 3-4)
Actions: flexes digits at MCP joings and extend IP joints (digits 2-5)

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15
Q

Dorsal Interossei Muscles

A

Origin: adjacent sides of metacarpals
Insertion: extensor hood and base of prox. phalanges of digits 2-4
Inn: deep branch of ulnar n
Actions: abducts digits 2-4, assists lumbricals in flex MCP and extend IP joints (DAB)

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16
Q

Palmar Interossei Muscles

A

Origin: sides of metacarpals (digits 2,4,5)
Insertion: extensor expansion of digits 2, 4, 5 and base of prox. phalanx
Inn: deep branch of ulnar n
Actions: adducts digits 2, 4, 5; assists lumbricals in flex MCP and extend IP joints (PAD)

17
Q

Arteries of Hand

A

one branch: deep palmar
swings laterally across palm to form superficial palmar arch; gives rise to common palmar digital aa and proper palmar digital aa

18
Q

deep palmar arch branches

A

palmar metacarpal aa
perforating branches

19
Q

Anatomical Snuff Box

A

Borders:
Lateral: abductor pollicis longus tendon and extensor pollicis brevis tendon
Medial: extensor pollicis longus tendon
Floor: Scaphoid and trapezium

20
Q

what does the anatomical snuff box contain

A

radial artery

21
Q

veins of hand

A

deep- accompany aa of the same name
superficial- dorsal venous network, cephalic, basilic

22
Q

median nerve branches in hand

A

palmar, recurrent, common palmar digital nn, proper palmar digital nn

23
Q

ulnar nerve branches in hand

A

palmar branch- branches at anterior forearm
deep branch
superficial branch- common palmar digital n and proper palmar digital nn

24
Q

radial nerve branches in hand

A

superficial branch
all sensory in hand

25
Q

what action does myotome C8 test

A

ulnar deviation
thumb extension

26
Q

what action does myotome T1 test

A

finger abduction

Foundations (4 decks)

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