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Anatomy Of The Upper Extremity > Muscles Of The Hand > Flashcards

Muscles Of The Hand Flashcards

0
Q

Insertion of the opponens pollicis

A

Lateral side of the first metacarpal

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1
Q

Origin of the opponens pollicis

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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2
Q

Innervation of the opponens pollicis

A

Recurrent branch of median nerve (C8, T1)

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3
Q

Actions of the opponens pollicis

A

To oppose thumb, it draws 1st metacarpal medially to center of palm and rotates it medially.

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4
Q

Origin of the abductor pollicis brevis

A

Flexor retinaculum and tubercle of the scaphoid and trapezium

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5
Q

Insertion of the abductor pollicis brevis

A

Lateral side of base of proximal phalanx of thumb

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6
Q

Innervation of abductor pollicis brevis

A

Recurrent branch of median nerve (C8, T1)

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7
Q

Actions of the abductor pollicis brevis

A

Abducts thumb; helps oppose it

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8
Q

Origin of the flexor pollicis brevis (superficial head, deep head)

A

Flexor retinaculum and tubercles of scaphoid and trapezium

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9
Q

Insertion of the flexor pollicis brevis (superficial head, deep head)

A

Lateral side of base of proximal phalanx of thumb

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10
Q

Innervation of the flexor pollicis brevis (superficial head, deep head)

A

Recurrent branch of the median nerve (C8, T1)

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11
Q

Actions of the flexor pollicis brevis (superficial head, deep head)

A

Flexes thumb

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12
Q

Origin of adductor pollicis

A

Oblique head: bases of the 2nd and 3rd metacarpals, capitate, and adjacent carpals

Transverse head: anterior surface of shaft of 3rd metacarpal

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13
Q

Insertion of the adductor pollicis

A

Medial side of base of proximal phalanx of thumb

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14
Q

Innervation of the adductor pollicis

A

Deep branch of ulnar nerve (C8, T1)

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15
Q

Actions of the adductor pollicis

A

Adducts thumb toward lateral border of palm

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16
Q

Origin of the abductor digiti minimi

A

Pisiform

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17
Q

Insertion of abductor digiti minimi

A

Medial side of base of proximal phalanx of 5th finger

18
Q

Innervation of abductor digiti minimi

A

Deep branch of ulnar nerve (C8, T1)

19
Q

Actions of the abductor digiti minimi

A

Abducts 5th finger

Assists in flexion of its proximal phalanx

20
Q

Origin of the flexor digiti minimi brevis

A

Hook of hamate and flexor retinaculum

21
Q

Insertion of the flexor digiti minimi brevis

A

Medial side of base of proximal phalanx of 5th finger

22
Q

Innervation of the flexor digiti minimi brevis

A

Deep branch of the ulnar nerve (C8, T1)

23
Q

Actions of the flexor digiti minimi brevis

A

Flexes proximal phalanx of 5th finger

24
Q

Origin of the opponens digiti minimi

A

Hook of hamate and flexor retinaculum

25
Q

Insertion of the opponens digiti minimi

A

Medial border of 5th metacarpal

26
Q

Innervation of the opponens digiti minimi

A

Deep branch of the ulnar nerve (C8, T1)

27
Q

Actions of the opponens digiti minimi

A

Draws 5th metacarpal anterior and rotates it, bringing he 5th finger into opposition with thumb

28
Q

Origin of the 1st and 2nd lumbricals

A

Lateral two tendons of flexor digitorum profundus (as unipennate muscles)

29
Q

Insertions of 1st and 2nd lumbricals

A

Lateral sides of extensor expansion of 2nd-5th fingers

30
Q

Innervation of the 1st and 2nd lumbricals

A

Median nerve (C8, T1)

31
Q

Actions of the 1st and 2nd lumbricals

A

Flex metacarpophalangeal joints

Extend interphalangeal joints of 2nd-5th fingers

32
Q

Origin of the 3rd and 4th lumbricals

A

Medial three tendons of the flexor digitorum profundus (as bipennate muscles)

33
Q

Insertion of the 3rd and 4th lumbricals

A

Lateral sides of extensor expansion of the 2nd-5th fingers

34
Q

Innervation of the 3rd and 4th lumbricals

A

Deep branch of ulnar nerve (C8, T1)

35
Q

Actions of the 3rd and 4th lumbricals

A

Flex metacarpophalangeal joints

Extend interphalangeal joints of 2nd-5th fingers

36
Q

Origin of the dorsal interossei (1-4)

A

Adjacent sides of two metacarpals (as bipennate muscles)

37
Q

Insertion of the dorsal interossei (1-4)

A

Bases of proximal phalanges

Extensor expansions of 2nd-4th fingers

38
Q

Innervation if the dorsal interossei (1-4)

A

Deep branch of the ulnar nerve (C8, T1)

39
Q

Actions of the dorsal interossei (1-4)

A

Abduct 2md-4th fingers from axial line

Act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

40
Q

Origin of the palmar interossei (1-3)

A

Palmar surface of 2nd, 4th, and 5th metacarpals (as unipennate muscles)

41
Q

Insertion of the palmar interossei (1-3)

A

Bases of the proximal phalanges

Extensor expansions of the 2nd, 4th, and 5th fingers

42
Q

Innervation of the palmar interossei (1-3)

A

Deep branch of the ulnar nerve (C8, T1)

43
Q

Actions of the palmar interossei (1-3)

A

Adduct 2nd, 4th and 5th fingers toward axial line

Assist lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints

Anatomy Of The Upper Extremity (2 decks)

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