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MSAK > Muscles Of The Hand > Flashcards

Muscles Of The Hand Flashcards

1
Q

Hand consist of:

A
  1. Carpus (wrist)
  2. Metacarpus (hand proper)
  3. Digits (fingers)
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2
Q

Fingers names lateral to medial

A

Pollex (thumb), indicis (index), middle, ring, digiti minimis (pinky)

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3
Q

Anterior side of hand

A

Volar region (palm)

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4
Q

Posterior side of hand

A

Dorsum (back of hand)

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5
Q

Axis of hand

A

3rd metacarpal through middle finger

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6
Q

Abduction and adduction of fingers are relative to:

A

Axis of the hand

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7
Q

Middle finger has…abductor and …adductor

A

2 abductors and no adductor no

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8
Q

Polex has…to rest of fingers

A

90 degree rotation

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9
Q

Movements of pollex are defined at…to movements of other fingers

A

Right angles

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10
Q

Finger movements are at…joints

A

Metacarpophalangeal joints (MCP)

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11
Q

Polex movements are at…joints

A

Carpometacapus joints (CMC)

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12
Q

Carpal arch is formed by:

A

Carpal bones and flexor retinaculum

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13
Q

What passes through the carpal tunnel?

A
  1. 4 flexor digitorum superficialis tendons
  2. 4 flexor digitorum profundus tendons
  3. 1 flexor pollicis longus tendon
  4. Median nerve
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14
Q

Groups of intrinsic muscles of the hand

A
  1. Thenar (inferior to thumb)
  2. Hypothenar (inferior to pinky)
  3. Central
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15
Q

Thenar muscle group includes:

A
  1. Abduction pollicis brevis (APB)
  2. Flexor pollicis brevis (FPB)
  3. Opponens pollicis (deepest)
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16
Q

Abduction pollicis brevis (origin, insertion, action, nerve)

A
  1. Origin: Scaphoid, trapezium, flexor retinaculum
  2. Insertion: proximal phalanx of thumb
  3. Action: abduction of thumb @ MCP & CMC joints
  4. Nerve: Median
17
Q

Flexor pollicis brevis (origin, insertion, action, nerve)

A
  1. Origin: Trapezium, flexor retinaculum
  2. Insertion: proximal phalanx of thumb
  3. Action: flexion of thumb @ CMC & MCP joints
  4. Nerve: Median (& ulnar FYI)
18
Q

Abductor digiti minimi (origin, insertion, action, nerve)

A
  1. Origin: Pisiform and tendons of flexor carpi ulnaris (FCU)
  2. Insertion: proximal phalanx of pinky
  3. Action: abduction of pinky @ CMC & MCP joints
  4. Nerve: Ulnar
19
Q

Flexor digiti minimi brevis of manus (origin, insertion, action, nerve)

A
  1. Origin: Hook of hamate and flexor retinaculum
  2. Insertion: proximal phalanx of pinky
  3. Action: flexion of pinky @ CMC & MCP joints
  4. Nerve: Ulnar
20
Q

True or false: there is a flexor digiti minimi brevis and longus.

A

False, only brevis

21
Q

Adductor pollicis (origin, insertion, action, nerve)

A
  1. Origin: capitate, 2nd & 3rd metacarpals
  2. Insertion: base of proximal phalanx of thumb
  3. Action: adduction of thumb @ CMC & MCP joints
  4. Nerve: Ulnar
22
Q

Lumbrical group (origin, insertion, action, nerve)

A

Origin: tendon of flexor digitorum profundus of fingers 2-5
Insertion: dorsal digital expansion of fingers 2-5
Action: Flexion of fingers 2-5 @ MCP joints, extension of fingers 2-5 @ PIP & DIP joints
Nerve: Median for finger 2&3 and ulnar for fingers 4&5

23
Q

Lumbrical insertions #1-4

A
  1. L#1-F#2
  2. L#2-F#3
  3. L#3-F#4
  4. L#4-F#5
24
Q

Hypothenar muscle group includes:

A
  1. Abduction digiti minimis brevis (ADMB)
  2. Flexor digiti minimis brevis (FDMB)
  3. Oppens digit minimi (deepest)
  4. Palmaris brevis
25
Q

Central muscle group include:

A
  1. Lumbrical muscles
  2. Dorsal Interossei muscles
  3. Palmar Interossei muscles
  4. Adductor pollicis
26
Q

Palmar interossei muscles (origin, insertion, action, nerve)

A
  1. Origin: Anterior side of metacarpals of fingers #2,4 & 5
  2. Insertion: Base of proximal phalanges & dorsal digital expansions of fingers #2,4 & 5
  3. Action: Adduction and flexion of fingers #2,4 & 5 @ MCP joints & extension of fingers #2, 4 & 5 @ IP joints
  4. Nerve: Ulnar
27
Q

PAD

A

P almar interossei muscle = AD duction (& tata)

28
Q

Dorsal interossei muscles (origin, insertion, action, nerve)

A
  1. Origin: Adjacent sides of metacarpals #2,3 & 4
  2. Insertion: Base of proximal phalanx & dorsal digital expansions of fingers #2,3 & 4
  3. Action: Abduction and flexion of fingers #2,3 & 4 @ MCP joints extension of fingers #2,3 & 4 @ IP joints
  4. Nerve: Ulnar
29
Q

DAB

A

D orsal interossei muscles = AB duction

MSAK (6 decks)

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