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Anatomy 3319 > Upper limb 4 > Flashcards

Upper limb 4 Flashcards

1
Q

Superficial Posterior Muscles of the Forearm

A 
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum 
Extensor carpi ulnaris
Brachioradialis
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2
Q

Deep Posterior Muscles of the Forearm

A 
Supinator
Abductor pollicis longus
Extensor pollicis longus
Extensor indicis
Extensor pollicis brevis
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3
Q

Extensor digiti minimi

A

belly of extensor digitorum

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4
Q

Extensor Carpi Radialis Longus

A

O: Lateral supracondyle ridge of humerus
I: base of 2nd metacarpal
A: Extend + Abduct hand
I: Radial nerve

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5
Q

Extensor Carpi Radials Brevis

A

O: Lateral epicondyle of humerus
I: base of 3rd metacarpal
A: Extend + Abduct hand
I: radial nerve (C7,C8)

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6
Q

Extensor Digitorum

A

O: Lateral epicondyle of humerus
I: Extensor expansions of digits
A: Extend wrist and fingers (at metacarpophalangeal joint)
I:Radial nerve(C7,C8)

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7
Q

Extensor Carpi Ulnaris

A

O: Lateral epicondyle of humerus + ulna
I: base of 5th metacarpal
A: Extend + Abduct hand
I: Radial nerve

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8
Q

Brachioradialis

A

O: lateral supracondylar ridge of humerus
I: lateral surface of radius
A: Flexes forearm
I: Radial nerve

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9
Q

Muscles that receive input directly from radial nerve

A

Brachioradialis
Tricep brachii
Extensor Carpi Radialis Longus
Anconeus

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10
Q

Extension Expansions

A

Aponeurosis formed from the tendons of extensory digitorum

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11
Q

Extensor Retinaculum

A

Similar to Flexor Retinaculum

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12
Q

Supinator

A

O: Lateral epicondyle of humerus + supinator fossa + crest of ulna
I: Lateral/ posterior/ anterior surface of radius
A: Supinate forearm
I: Radial nerve

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13
Q

Abductor Pollicis Longus

A

O: Ulna, Radius, Interosseous membrane
I: Base of 1st metacarpal
A: Abduct + Extend thumb
I: Radial Nerve (posterior interosseous nerve)

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14
Q

Extensor Indicis

A

O: posterior surface of ulna
I: Extensor expansion of 2nd digit
A: Extend index finger + help extend hand
I: Radial Nerve (posterior interosseous nerve)

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15
Q

Extensor Pollicis Longus

A

O: Posterior surface of ulna
I: distal phalanx of thumb
A: Extend distal phalanx of thumb
I: Posterior interosseous nerve

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16
Q

Extensor Pollicis Brevis

A

O: posterior surface of radius
I: Base of Proximal phalanx of thumb
A: Extend proximal phalanx of thumb
I: Posterior interosseous nerve.

17
Q

Anatomical Snuffbox

A

Formed by tendons of Extensor Pollicis Longus and Brevis

18
Q

Extrinsic muscles of the hand

A

Flexor Pollicis Longus
Abductor pollicis Longus
Extensor Pollicis Longus
Extensor Pollicis Brevis

19
Q

Intrinsic muscles of the hand (Thenar)

A

Flexor Pollicis Brevis
Abductor Pollicis Brevis
Opponens Pollicis
Adductor Pollicis

20
Q

Groups of Intrinsic Muscles

A 
Thenar (4)
Hypothenar (3)
Palmar interosseous
- 4 lumbricals
- 3 palmar
- 4 dorsal
21
Q

Abductor Pollicis Brevis

A

O: Flexor Retinaculum
I: Lateral side of proximal phalanx of thumb
A: Abduct thumb + help oppose
I: Median Nerve

22
Q

Flexor Pollicis Brevis

A

O: Flexor Retinaculum
I: Lateral side of proximal phalanx of thumb
A: Flexes Thumb
I: Median Nerve

23
Q

Opponens Pollicis

A

O: Flexor Retinaculum
I: Lateral side of 1st metacarpal
A: Opposition
I: Median Nerve

24
Q

Adductor Pollicis

A

O: Oblique head: base of 2nd and 3rd metacarpals
Transverse head: anterior surface of 3rd metacarpal
I: medial side of proximal phalanx of thumb
A: Adduction
I; Ulnar Nerve

25
Q

Hypothenar muscles

A

Abductor digiti minimi
Opponens digiti minimi
Flexor digiti minimi
Palmaris digiti minimi

26
Q

Abductor digiti minimi

A

O: pisiform
I: Proximal phalanx of pinky
A: Abduct pinky
I: Ulnar nerve

27
Q

Opponens digiti minimi

A

O: hook of hamate + flexor retinaculum
I: 5th metacarpal
A: Opposition
I: Ulnar nerve

28
Q

Flexor digiti minimi brevis

A

O: hook of hamate + flexor retinaculum
I: Proximal phalanx of pinky
A: flexes proximal phlanx of pinky
I: ulnar nerve

29
Q

Palmar muscles major groups

A

lumbricals

interosseous

30
Q

Palmar interossei

A 
3 muscles
Superficial
Adducts fingers
none attached to middle finger
Uni-pennate
31
Q

Dorsal interossei

A 
4 msucles
Deep
Abduct fingers
2 attached to middle fingers
Bi-pennate
32
Q

Lumbricals

A

Worm-like muscles
allow flexion at metacarpophalangeal joints while maintaining extension at interphalangeal joints
Don’t directly attache to bone
Attach to tendons of flexor digitorum profundus and extensor expansions

33
Q

Innervation of intrinsic muscles

A 
Median nerve
- 2 lateral lumbricals 
- 3 most lateral thenars
Ulnar nerve
- 2 medial lumbricals
- all other intrinsic muscles

Anatomy 3319 (10 decks)

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