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Gross Anatomy > Hand > Flashcards

Hand Flashcards

1
Q

Flexor retinaculum KNOW this!

A

it’s in your paperwork

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2
Q

What are the four compartments of the hand?

A

Thenar, hypothenar, central, adductor-interosseus

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3
Q

What three intrinsic muscles are in the thenar compartment

A

opponens pollicis, flexor pollicis brevis, abductor pollicis brevis

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4
Q

What three intrinsic muscles are in the hypothenar compartment?

A

opponens digiti minimi, flexor digiti minimi, abductor digiti minimi

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5
Q

What is in the central compartment of the hand?

A

Tendons of the long digital flexors plus the lumbrical muscles (1-4)

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6
Q

What is in the adductor-nterosseus compartment of the hand?

A

adductor pollicis and 7 interosseous muscles.

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7
Q

What innervates the thenar compartment muscles of the hand?

A

Recurrent branch of the medial nerve

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8
Q

What innervates the muscles of the hypothenar compartment?

A

Deep branch of the ulnar nerve

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9
Q

What innervates the contents of the Central compartment of the hand?

A

Lumbrical muscles 1 &2 are innervated by the anterior interosseous branch of median nerve
3&4 are innervated by deep ulnar nerve

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10
Q

opponens pollicis origin

A

Ridge of trapezium

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11
Q

opponens pollicis insertion

A

Radial side of 1st metacarpal

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12
Q

opponens pollicis nerve

A

Recurrent branch of median nerve

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13
Q

opponens pollicis action

A

Opposes thumb towards center of palm by flexing and rotating it medially

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14
Q

Flexor pollicis brevis origin

A

Superficial head- common with opponens pollicis (ridge of trapezium)
Deep head- Trapezoid and capitate

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15
Q

flexor pollicis brevis insertion

A

radial base of proximal phalanx of digit one

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16
Q

flexor pollicis brevis nerve

A

Recurrent branch of median

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17
Q

flexor pollicis brevis action

A

Flexes thumb at metacarpophalangeal joint

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18
Q

Abductor pollicis brevis origin

A

Scaphoid and trapezium

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19
Q

abductor pollicis brevis insertion

A

Radial base of proximal phalanx of digit 1

20
Q

abductor pollicis brevis nerve

A

recurrent branch of median nerve

21
Q

abductor pollicis brevis action

A

abducts thumb and assists in opposition

22
Q

Opponens digiti minimi origin

A

Hook of hamate

23
Q

opponens digiti minimi insertion

A

Medial(ulnar) side of the 5th metacarpal

24
Q

opponens digiti minimi nerve

A

Deep branch of ulnar nerve

25
Q

opponens digiti minimi action

A

opposes digiti minimi toward center of palm by flexing and rotating it laterally

26
Q

flexor digiti minimi brevis origin

A

hook of hamate

27
Q

flexor digiti minimi brevis insertion

A

ulnar(medial) base of proximal phalanx on digit 5

28
Q

flexor digiti minimi brevis nerve

A

Deep branch of ulnar nerve

29
Q

flexor digiti minimi brevis action

A

flexes digit 5 at MP joint

30
Q

Lumbricals origin

A

Flexor digitorum profundus tendons

31
Q

Lumbricals insertion

A

Lateral (radial) sides of Extensor expansion

32
Q

Lumbricals nerve

A

1&2 Median

3&4 Deep ulnar

33
Q

Lumbricals action

A

each flexes digit at Metacarpophalangeal joint and extends digits at PIP and DIP joints (bye bye muscle)

34
Q

Palmar interossei origin

A

Origin-
digits 4&5 radial side of metacarpals
Digit 2 ulnar side of metacarpals

35
Q

Palmar interossei insertion

A

Extensor expansion and base of proximal phalanx of the appropriate digit

36
Q

Palmar interossei nerve

A

deep ulnar

37
Q

Palmar interossei action

A

Draws it’s digit toward digit 3 AKA adducts

38
Q

Adductor pollicis origin

A

Oblique head- bases of metacarpals 2&3, the capitate and other central carpal bones
Transverse head-body of metacarpal 3

39
Q

Adductor pollicis insertion

A

Medial side of base of proximal phalanx of thumb.

40
Q

Adductor pollicis nerve

A

Deep ulnar

41
Q

Adductor pollicis action

A

Adducts thumb toward digit 3

42
Q

Dorsal interossei origin

A

Adjacent sides of metacarpals(bipennate, feather like)

43
Q

dorsal interossei insertion

A

Extensor expansion and base of the proximal phalanx of the appropriate digit.

44
Q

dorsal interossei nerve

A

deep ulnar

45
Q

dorsal interossei action

A

draw that digit away from digit 3 AKA abduct

Gross Anatomy (34 decks)

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