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Anatomy > Origin and Insertion of muscles > Flashcards

Origin and Insertion of muscles Flashcards

1
Q

superficial pectoral (descending and transverse)

A

O: 1st 3 sternebrae
I: crest of the greater tubercle of the humerus
action when not bearing weight: adduct limb
action when bearing weight: prevent limb abduction

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2
Q

deep pectoral

A

O: ventral part of the sternum
I: lesser tubercle of the humerus
action when not bearing weight: draw the limb caudally and flex shoulder joint
action when bearing weight: pull trunk cranially and extend shoulder joint

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3
Q

cleidobrachialis

A

O: clavicle
I: distal end of the humerus
action: advance the limb and extend the shoulder joint

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4
Q

cleidocervicalis

A

O: clavicle
I: mid-dorsal fibrous raphe or nuchal crest of occipital
action: advance the limb and extend the shoulder joint

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5
Q

cleidomastoideus

A

O: clavicle
I: mastoid process
action: advance the imb and extend the shoulder joint

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6
Q

omotransversarius

A

O: wing of the atlas
I: scapular spine
action: advance the limb or flex the neck laterally

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7
Q

trapezius

A

O: median raphe from C3-T9
I: scapular spine
action: elevate and abduct the forelimb

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8
Q

rhomboideus capitis

A

O: nuchal crest of the occipital
I: dorsal border of the scapula
action: elevate the forelimb and draw the scapula in

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9
Q

rhomboideus cervicus

A

O: median raphe
I: dorsal border of the scapula
action: elevate the forelimb and draw the scapula in

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10
Q

rhomboideus thoracis

A

O: T1-7
I: dorsal border of the scapula
action: elevate the forelimb and draw the scapula in

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11
Q

latissimus dorsi

A

O: T6-L7
I: teres major tuberosity of the humerus
action: draw the limb caudally and flex the shoulder joint

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12
Q

serratus ventralis cervicus

A

O: transverse processes of C2-7
I: serrated face of scapula

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13
Q

serratus ventralis thoracis

A

O: transverse processes of T1-8
I: serrated face of scapula

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14
Q

sternomastoideus

A

O: manubrium
I: mastoid process

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15
Q

sternooccipitalis

A

O: manubrium
I: nuchal crest of the occipital

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16
Q

sternohyoideus

A

O: manubrium and 1st costal cartilage
I: basihyoid

17
Q

sternothyroideus

A

O: 1st costal cartilage
I: thyroid cartilage

18
Q

Name at least 4 of the extrinsic muscles of the limb. There are 8 total.

A
  1. Superficial pectoral
  2. Deep pectoral
  3. Brachiocephalicus
  4. Omotransversarius
  5. Trapezius
  6. Rhomboideus
  7. Latissimus dorsi
  8. Serratus ventralis cervicis/thoracis
19
Q

deltoideus

A

O: scapular spine/acromion
I: deltoid tuberosity of the humerus

20
Q

*supraspinatus

A

O: supraspinous fossa
I: greater tubercle of the humerus
actions: adduct, extend, medially rotate shoulder and stabilize shoulder joint
action when bearing weight: prevent lateral rotation

21
Q

infraspinatus

A

O: infraspinous fossa
I: greater tubercle of the humerus

22
Q

teres minor

A

O: infraglenoid tubercle/caudal border of scapula
I: teres minor tuberosity of the humerus

23
Q

subscapularis

A

O: subscapular fossa
I: greater tubercle of the humerus

24
Q

*teres major

A

O: caudal border of the scapula/caudal surface of the subscapularis
I: teres major tuberosity of the humerus
actions: flex and medially rotate the shoulder
action when weight bearing: prevent lateral rotation

25
Q

coracobrachialis

A

O: coracoid process of the scapula
I: crest of the lesser tubercle of the humerus

26
Q

*long head of the triceps

A

O: caudal border of the scapula
I: olecranon tuber
action: extend elbow, flex shoulder

27
Q

*lateral head of the triceps

A

O: tricipital line of the humerus
I: olecranon tuber
action: extend elbow

28
Q

*accesory head of the triceps

A

O: neck of the humerus
I: olecranon tuber
action: extend the elbow

29
Q

*medial head of the triceps

A

O: crest of the lesser tubercle
I: olecranon
action: extend the elbow

30
Q

*biceps brachii

A

O: supraglenoid tubercle of the scapula
I: ulnar and radial tuberosities
action: flex the elbow and extend the shoulder

31
Q

*extensor carpi radialis

A

O: lateral supracondylar crest
I: dorsal surface of metacarpals II and III
action: extend the carpus

32
Q

*common and lateral digital extensor

A

O: lateral epicondyle of the humerus
I: extensor processes of distal phalanges
action: extend the joints of the carpus and digits

33
Q

*superficial digital flexor

A

O: medial epicondyle of the humerus
I: the palmar surface of the base (proximal end) of the middle phalanges of digits 2,3,4, and 5
Innervation: medial nerve
action: to flex carpal, metocarpophalangeal and proximal interphalangeal joints

34
Q

*flexor carpi ulnaris

A

composed of ulnar head and humeral head
O of ulnar head: the caudal border and medial surface of the olecranon
O of humeral head: the medial epicondyle of the humerus
I: the accessory carpal bone
action: flex the carpal

35
Q

*deep digital flexor

A

O: medial epicondyle of the humerus, ulna and radius
I: flexor tubercle of the distal phalanx
action: to flex the carpal, metocarpalphalangeal and proximal and distal phalangeal joints

36
Q

ulnaris lateralis

A

O: lateral epicondyle of the humerus
I: metacarpal 5 and accessory carpal
A: abduct the manus, flex the carpal joint

37
Q

flexor carpi radialis

A

O: medial epicondyle of the humerus
I: palmar surface of base of metacarpals II and III
A: flex the carpus

Anatomy (16 decks)

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