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EXCI 253 (anatomy) > Muscles (the upper extremity) > Flashcards

Muscles (the upper extremity) Flashcards

1
Q

Muscles that cross in front of shoulder help w/ shoulder:

A

Flexion

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2
Q

Muscles that cross over shoulder help w/ shoulder:

A

Abduction

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3
Q

Muscles of the shoulder girdle will have origins and insertions between:

A

clavicle, scapula, thorax
- EXCEPT: pec maj. + lat. dorsi

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4
Q

Muscles of the shoulder have origins and insertions between:

A

clavicle, scapula, humerus

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5
Q

What are the muscles of the ant. shoulder girdle:

A
  • pec minor
  • serratus ant.
  • subclavius
  • pec. major (also a shoulder muscle)
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6
Q

muscles of post. shoulder girdle

A
  • Rhomboideus major
  • rhomboideus minor
  • levator scapula
  • trapezius
  • lat dorsi (also a shoulder muscle)
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7
Q

Muscles of the shoulder: superior

A

Supraspinatus, middle deltoid

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8
Q

Muscles of the shoulder: inferior

A

teres major, lat dorsi, long head of triceps brachii

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9
Q

Muscles of the shoulder: posterior

A

post. deltoid, teres minor, infraspinatus

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10
Q

muscles of the shoulder: anterior

A

pec major, coracobrachialis, subscapularis, ant. deltoid, long head of biceps brachii

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11
Q

Rotator cuff

A

supraspinatus, infraspinatus, teres minor, subscapularis

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12
Q

Muscles of the arm:

A

ant: biceps brachii, brachialis, coracobrachialis
post: triceps brachii

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13
Q

Muscles of forearm proximal vs distal ends

A

Proximal end: bulky (muscle bellies)
Distal end: Thin (muscle tendons)

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14
Q

Muslces of the forearm (actions)

A

Anterior: flexors and pronators
Post: extensors and supinators

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15
Q

Muscles of the anterior forearm are innervated by:

A

median n.
(except flexor carpi ulnaris: ulnar n., and flexor digitorum profundus: median + ulnar n.)

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16
Q

Ant. muscles of forearm: superficial (5)

A
  • pronator teres
  • flexor carpi radialis
  • palmaris longus
  • flexor digitorum superficialis
  • flexor carpi ulnaris
17
Q

Ant. muscles of forearm: deep (3)

A
  • Flexor digitorum profundus
  • Flexor pollicis longus
  • pronator quadratus
18
Q

Muscles of post. forearm are innervated by:

A

radial n.

19
Q

Action of muscles of post. forearm:

A

Extensors of wrist + fingers
(Except: brachioradialis (flexor))

20
Q

Post. muscles of forearm: superficial (6)

A
  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Digitorum
  • Extensor Digiti Minimi
  • Extensor Carpi Ulnaris
  • Anconeus
21
Q

Post. muscles of forearm (5)

A
  • Extensor Pollicis Longus
  • Extensor Pollicis Brevis
  • Abductor Pollicis Longus
  • Extensor Indicis
  • Supinator
22
Q

What are the muscles around the anatomical snuffbox?

A
  • Extensor Pollicis Longus
  • Extensor Pollicis Brevis
  • Abductor Pollicis Longus
23
Q

What are the contents of the anatomical snuffbox?

A

Radial artery, base of scaphoid b., and trapezium b.

24
Q

Extrinsic muscles of the hand meaning.

A

muscles of the forearm that insert in the hand

25
Q

Intrinsic muscles of the hand meaning.

A

Muscles that originate and insert within the hand

26
Q

What are the 3 groups of intrinsic hand muscles?

A
  1. Lateral = Thenar eminence
  2. Medial = Hypothenar eminence
  3. Palmar aspect = Deep palmar muscles
27
Q

What are the muscles in the thenar eminence of the hand?

A
  • Abductor pollicis brevis
  • Flexor pollicis brevis
  • opponens pollicis (transverse and oblique heads)
28
Q

What is the innervation of the thenar eminence?

A

median n.
(EXCEPT; adductor pollicis: ulnar n.)

29
Q

What are the muscles of the hypothenar eminence of the hand?

A
  • Abductor digiti minimi
  • Flexor digiti minimi brevis
  • Opponens digiti minimi
30
Q

What is the innervation of the hypothenar eminence?

A

ulnar n.

31
Q

What are the muscles of the palm?

A
  1. Dorsal interossei
  2. Palmar interossei
  3. Lumbricals
32
Q

What is the innervation of dorsal and palmar interossei?

A

ulnar n.

33
Q

Describe dorsal interossei m.

A
  • 4
  • originate from both sides of metacarpals
  • insert on proximal phalanges 2,3,4
  • 1st: dorsal webbing
  • abducts fingers
34
Q

Desbribe palmar interossei m.

A
  • 3
  • Originate from medial side of metacarpals
  • insert on proximal phalanges 2,4,5
  • # 1: not always present (fourth one)
  • Adducts fingers
35
Q

What is the innervation of lumbricals m.

A

1 and #2: median n.

#3 and #4: ulnar n.

36
Q

Describe lumbricals m.

A
  • 4
  • Orginate on tendons of flexor digitorum profundus
  • insert into extensor expansion 2-5

EXCI 253 (anatomy) (18 decks)

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