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human structure and function > MSK anatomy > Flashcards

MSK anatomy Flashcards

1
Q

what is the origin of the orbicularis oculi?

A

medial margin of orbit

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2
Q

what is the insertion of the orbicularis oculi?

A

skin of eyelid

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3
Q

what is the action of the orbicularis oculi?

A

closes eyes

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4
Q

what is the origin of the orbicularis oris?

A

maxilla and mandible

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5
Q

what is the insertion of the orbicularis oris?

A

skin at the corner of the mouth

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6
Q

what is the action of the orbicularis oris?

A

closes lips

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7
Q

what is the origin of the temporalis?

A

temporal bone

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8
Q

what is the insertion of the temporalis?

A

mandible

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9
Q

what is the action of the temporalis?

A

elevate and retract the mandible

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10
Q

what is the origin of the masseter?

A

zygomatic arch

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11
Q

what is the insertion of the masseter?

A

mandible

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12
Q

what is the action of the masseter?

A

elevates mandible

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13
Q

what is the origin of the buccinator?

A

maxilla and mandible

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14
Q

what is the insertion of the buccinator?

A

fibres of orbicularis oris

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15
Q

what is the action of the buccinator?

A

compress cheek

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16
Q

what is the origin of the sternocleidomastoid?

A

sternum and sternal end of clavicle

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17
Q

what is the insertion of the sternocleidomastoid?

A

mastoid process

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18
Q

what is the action of the sternocleidomastoid?

A
  • head rotates left or right when one muscle contracts

- neck flexes when both contract

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19
Q

what is the origin of the external intercostal muscles?

A

inferior border of rib above

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20
Q

what is the insertion of the external intercostal muscles?

A

superior border of rib below

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21
Q

what is the action of the external intercostal muscles?

A

inspiration, lifts the ribs

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22
Q

what is the origin of the internal intercostal muscles?

A

superior border of rib below

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23
Q

what is the insertion of the internal intercostal muscles?

A

inferior border of rib above

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24
Q

what is the action of the internal intercostal muscles?

A

forced expiration depresses ribs

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25
Q

what is the origin of the rectus abdominis?

A

superior surface of the pubic bone

26
Q

what is the insertion of the rectus abdominis?

A
  • xiphoid process

- 5th-7th costal cartilage of ribs

27
Q

what is the action of the rectus abdominis?

A

flexion of trunk

28
Q

what is the origin of the trapezius?

A
  • occipital bone

- cervical and throacic vertebrae

29
Q

what is the insertion of the trapezius?

A
  • clavicle
  • spine of scapula
  • acromion
30
Q

what is the action of the trapezius at the neck?

31
Q

what is the action of the trapezius at the shoulder?

A
  • elevation/depression

- retraction/rotation of scapula

32
Q

what is the origin of the latissimus dorsi?

A
  • lower thoracic vertebrae

- iliac crest

33
Q

what is the insertion of the latissimus dorsi?

34
Q

what is the action of the latissimus dorsi?

A

adduction and extension of the humerus at the shoulder joint

35
Q

what is the origin of the pectoralis major?

A
  • sternum
  • clavicle
  • upper ribs
36
Q

what is the insertion of the pectoralis major?

A

greater tubercle and intertubercular sulcus of humerus

37
Q

what is the action of the pectoralis major?

A

adduction, flexion, and medial rotation. of the humerus

38
Q

what is the origin of the serratus anterior?

A

ribs 1-8/9

39
Q

what is the insertion of the serratus anterior?

A

medial border of scapula (anterior surface)

40
Q

what is the action of the serratus anterior?

A

protraction of scapula, rotates upwards

41
Q

what is the origin of the deltoid?

A
  • clavicle
  • acromion
  • spine of scapula
42
Q

what is the insertion of the deltoid?

A

deltoid tuberosity of humerus

43
Q

what is the action of the deltoid?

A

abduction of humerus

44
Q

what is the origin of the biceps brachii?

A

short head: coracoid process

long head: scapula above glenoid cavity

45
Q

what is the insertion of the biceps brachii?

A

radial tuberosity

46
Q

what is the action of the biceps brachii?

A

flexion and supination of forearm

47
Q

what is the origin of the triceps brachii?

A

long head: scapula, below glenoid cavity

lateral and medial: posterior surface of humerus

48
Q

what is the insertion of the triceps brachii?

A

olecranon process of ulna

49
Q

what is the action of the triceps brachii?

A

extension of forearm

50
Q

what is the origin of the flexor pollicus longus?

A

radius (anterior shaft)

51
Q

what is the insertion of the flexor pollicus longus?

A

distal phalanx of thumb (anterior surface)

52
Q

what is the action of the flexor pollicus longus?

A

flexion of thumb

53
Q

what is the origin of the flexor digtorium superficialis?

A

medial epicondyle of humerus, radius, and ulna

54
Q

what is the insertion of the flexor digtorium superficialis?

A

anterior surface of phalanges

55
Q

what is the action of the flexor digtorium superficialis?

A

flexion of digit fingers

56
Q

what is the origin of the extensor digtorium?

A

lateral epicondyle of humerus

57
Q

what is the insertion of the extensor digtorium?

A

posterior surface of phalanges

58
Q

what is the action of the extensor digtorium?

A

extension of fingers

59
Q

what is the origin of the extensor pollicus longus?

A

ulna (posterior surface)

60
Q

what is the insertion of the extensor pollicus longus?

A

distal phalanx of thumb (posterior surface)

61
Q

what is the action of the extensor pollicus longus?

A

extension of fingers

human structure and function (21 decks)

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