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Anatomy > Thoracic Limb: Origin, Insertion, Action, Innervation > Flashcards

Thoracic Limb: Origin, Insertion, Action, Innervation Flashcards

1
Q

Two superficial pectoral muscles with ORIGINS and INSERTIONS

A

1) Descending pectoral
ORIGIN-1st sternebrae
INSERTION-crest of greater tubercle of humerus

2)Transverse pectoral
ORIGIN-2nd/3rd sternebrae
INSERTION-crest of greater tubercle

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2
Q

ACTION of superficial pectoral muscles

A

ACTION: Adduct limb when it’s not bearing weight or prevent limb from being abducted when bearing weight.

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3
Q

Deep pectoral ORIGIN and INSERTION

A

O-Ventral part of sternum and fibrous part of raphe

I-Majority (tendinous) on lesser tubercle

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4
Q

Deep pectoral ACTION

A

Pull trunk cranially and extend shoulder joint (supporting wt). If not supporting wt, to abduct and flex shoulder jt.

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5
Q

Two muscles that make up the brachiocephalicus ORIGIN and INSERTION

A

1)Cleidobrachialis
O- clavicle
I-Distal end of cranial border of humerus

2)Cleidocephalicus
O-clavicle
I-Clavicular tendon to the neck and head

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6
Q

Two parts of cleidocephalicus

A

1-cleidocervicalis: attaches to mid-dorsal fibrous raphe and nuchal crest of occipital bone.
2-cleidomastoideus: attaches to mastoid process of temporal bone

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7
Q

Omotransversarius attachment

A

Distal end of spine of scapula and transverse wing of atlas

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8
Q

Omotransversarius ACTION

A

Advance limb or flex neck laterally

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9
Q

Two parts of tapezius muscle

A

1-Cervical: cranial to aponeurosis

2-Thoracic: caudal to aponeurosis

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10
Q

Trapezius ORIGIN and INSERTION

A

O-Median raphe of neck and supraspinous ligament from C3 to T9.
I-Spine of scapula

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11
Q

Three parts of the rhomboideus muscle

A

1-rhomboideus capitis:attaches cranial dorsal border of scapula to nuchal crest of occipital bone
2-rhomboideus cervicis: runs from median raphe of neck to dorsal border of scapula
3-rhomboideus thoracis- connects spines of T vertebrae to dorsal border of scapula.

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12
Q

Rhomboideus ORIGIN and INSERTION

A

O-Nuchal crest of occipital bone, median raphe of neck, spinous process of first 7 T vertebrae
I-dorsal border of scapula

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13
Q

Lastissimus dorsi ORIGIN and INSERTION

A

O-Spinous process of lumbar and last 7/8 TVert and muscular attachment to last 2 or 3 ribs
I-Teres major tuberosity of humerus and teres major tendon

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14
Q

Rhomboideus ACTION

A

Elevate forelimb and draw scapula against trunk

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15
Q

Latissimus dorsi ACTION

A

Flex shoulder joint- create digging action.

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16
Q

Serratus ventralis cervicis and serratus ventralis thoracis ORIGIN and INSERTION

A

O-Transverse processes of last 5 C vert and first 7/8 ribs ventral to their midlline
I-Dorsomedial third of serrated face of scapula

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17
Q

Trapezius action

A

To elevate and abduct the forelimb

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18
Q

Supraspinatus ORIGIN and INSERTION

A

O-supraspinous fossa

I-> tubercle of the humerus by a thick tendon

19
Q

Supraspinatus ACTION

A

To extend and laterally stabilize the shoulder joint

20
Q

Teres minor ORIGIN and INSERTION

A

O-Infraglenoid tubercle and distal 3rd of caudal border of spine
I-Teres minor tuberosity of humerus

21
Q

Teres major ACTION

A

Flex the shoulder, rotate the shoulder laterally, and prevent medialrotation when weight bearing.

22
Q

Name the four parts of the triceps brachii

A

1-Long head
2-Lateral head
3-Accessory head
4-Medial head

23
Q

Triceps brachii- long head ORIGIN and INSERTION

A

O-Caudal border of scapula

I-Olecranon tuber

24
Q

Triceps brachii-long head ACTION

A

Extend elbow and flex the shoulder

25
Q

Triceps brachii-lateral head ORIGIN and INSERTION

A

O-Tricipital line of the humerus

I-Olecranon tuber

26
Q

Tricpes brachii- lateral head ACTION

A

Extend elbow

27
Q

Triceps brachii- accessory head ORIGIN and INSERTION

A

O-Neck of the humerus

I-Olecranon tuber

28
Q

Triceps brachii-accessory head ACTION

A

Extend elbow

29
Q

Triceps brachii- medial head ORIGIN and INSERTION

A

O-Crest of the lesser tubercle near the teres major tuberosity
I-Olecranon

30
Q

Triceps brachii- medial head ACTION

A

Extend elbow

31
Q

Brachiocephalicus ACTION

A

Advance limb, extend shoulder joint, and draw neck to the side.

32
Q

Biceps brachii ORIGIN and INSERTION

A

O-Supraglenoid tubercle

I-The ulnar and radial tuberosties

33
Q

Biceps brachii ACTION

A

Flex elbow and extend shoulder

34
Q

Extensor carpi radialis ORIGIN and INSERTION

A

O-Lateral supracondylar crest

I-Small tuberosities on the dorsal surfaces of the base of metacarpals II and III.

35
Q

Extensor carpi radialis ACTION

A

Extend carpus

36
Q

Common digital extensor ORIGIN and INSERTION

A

O-Lateral epicondyle of humerus

I-Extensor processes of the distal phalanges of digits II,III,IV,V

37
Q

Common digital extensor ACTION

A

Extend joints of the four principal digits (2-5) and the carpus

38
Q

Superficial digital flexor ORIGIN and INSERTION

A

O-Medial epicondyle of the humerus

I-Palmar surface of the proximal end of middle phalanges of digits 2-5

39
Q

Superficial digital flexor ACTION

A

Flex carpal, metacarpophalangeal, and proximal interphalangeal joints of digits 2-5.

40
Q

Flexor carpi ulnaris: two parts ORIGIN and INSERTION

A

Ulnar head: caudal border/medial surface of olecranon
Humeral head:medal epicondyle of the humerus

Insertion-accessory carpal bone

41
Q

Flexor carpi ulnaris ACTION

A

Flex the carpus

42
Q

Deep digital flexor ORIGIN and INSERTION

A

O-humerus medial epicondyle, proximal/caudal border of ulna, medial border of radius
I-Flexor tubercle on palmar surface of distal phalanx of each digits

43
Q

Deep digital flexor ACTION

A

Flex carpal and metacarpophalangeal joints and the proximal and distal interphalangeal joints of the dgits.

Anatomy (22 decks)

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