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Anatomy 3401 > Hand Muscles > Flashcards

Hand Muscles Flashcards

1
Q

Muscles inserting on distal phalanges 2-5

A

flexor digitorum profundus

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2
Q

Muscles inserting on middle phalanges 2-5

A

flexor digitorum superficialis

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3
Q

Muscle inserting on distal phalanx of the thumb

A

flexor pollicis longus

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4
Q

Muscles inserting on pisiform, hamate and 5th metacarple

A

flexor carpi ulnaris

innervated by ulnar nerve

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5
Q

Superficial structures of the palm

A

hypothenar eminence (pinky)
- AFO
thenar eminance (thumb)
- AFO

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6
Q

Tendon of palmaris longus

A

Palmar apneurosis

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7
Q

intermediate structures of the palm

A

Long Flexor Tendonds

  • flexor digitorum superficialis
  • flexor digitorum profundus

Lumbrical Muscles

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8
Q

Long flexor tendons travel

A

UNDER flexor retinaculum

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9
Q

Flexor digitorum superficialis and profundus attach

A

superficialis - middle metacarpals

profundus - distal metacarpals 2-5

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10
Q

Deep structures of the palm

A

Interosseus muscles

Palmar interossei - adduction
Dorsal interossei - abduction of fingers

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11
Q

Superficial branch ulnar nerve with respect to ‘flexor retinaculum’

A

OVER

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12
Q

Palmaris Brevis

A
  • Above hypothenar AFO
  • attached to palmer apneurosis and inserts on hypotenar skin

**only muscle innervated by the superficial branch of the ulnar nerve

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13
Q

Hypothenar eminence muscles

A

AFO
“ab”ductor digiti minimi (outside)
flexor digiti minimi (middle)
oppenens digit minimi (deep to)

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14
Q

Thenar eminence muscles

A

AFO
“ab”ductor pollicis brevis
flexor pollicis brevis
oppenenes pollicis brevis

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15
Q

Thenar eminence origin

A
  • flexor retinaculum

- scaphoid and trapezium bone

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16
Q

Thenar eminence insertion

A

A - proximal phalanx of thumb
F - proximal phalanx of thumb
O - 1st metacarpal

17
Q

Thenar eminence innervation

A

recurrent median nerve

18
Q

Actions of thenar and hypothenar muscles

A

A - Abduction
F - Flexion
O - Opposition

(of thumb and 5th digit)

19
Q

Opposition movement definition

A

bringing the thumb and pinky finger together

20
Q

Hypothenar Eminence origins

A

A
- pisiform bone

F and O
- flexor retinaculum and hamate bone

21
Q

Hypothenar Eminence insertions

A

A and F
- Proximal phalanx of digit 5

O
- 5th metacarpal

22
Q

Hypothenar eminence innervation

A

deep branch of ulnar nerve

23
Q

Adductor pollicis origin

A

oblique head:

  • bases of 2nd and 3rd metacarpal
  • capitate

transverse head:
- 3rd metacarpal

24
Q

Adductor pollicis insertion

A

proximal phalanx of thumb - medial side

25
Q

Addcutor pollicis innervation

A

deep branch of ulnar nerve

26
Q

adductor pollicis action

A

adduction of thumb

27
Q

Lumbercals origin

A

tendons of flexor digitorum profundus

28
Q

muscles originating from tendons of flexor digitorum profundus?

A

lumbercals

29
Q

Lumbercals insertion

A

extensor expansions

30
Q

Lumbercals innervation

A

lateral 2:
median nerve

medial 2:
deep branch of ulnar nerve

31
Q

Lumbercals action

A

flexion of digits at MCP joints

extension of digits at IP joints

32
Q

interossei origin

A

metacarpal bones

33
Q

interossei insertion

A

extensor expansions

bases of proximal phalanges

34
Q

interossei innervation

A

deep branch ulnar nerve

35
Q

dorsal interossei (1-4) action

A

ABduction of digits from axial line

flexion of digits at MCP joint
extension of digits at IP joints

36
Q

palmer interossei (1-3) action

A

ADduction of digits from axial line

flexion of digits at MCP joint
extension of digits at IP joints

37
Q

muscles that cause:
flexion of digits at MCP joint
extension of digits at IP joints

A 
lumbercals 
interossei (dorsal and palmer)
38
Q

Muscles of hand innervated by ‘median nerve’

A

Lateral 2 Lumbercals

Thenar Eminence Muscles - AFO
- reccurent median nerve

Anatomy 3401 (17 decks)

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