Muscles of the pectoral girdle Flashcards Preview

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Flashcards in Muscles of the pectoral girdle Deck (38)
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1

Movement of the adductor muscles of the forelimb

pull the forelimb to the median plane

2

Movement of the abductor muscles of the forelimb

pull the forelimb away from the median plane

3

Movement of the flexor muscles of the forelimb

are located on the side of the limb towards which the joint bends when the joint angle is decreased (contract your biceps brachii, the elbow joint bends towards your biceps brachii and the angle of the elbow joint is decreased i.e. the biceps brachii is a flexor muscle of the elbow)

4

Movement of the extensor muscles of the forelimb

are located on the side of the limb towards which the joint bends when the joint angle is increased (contract your triceps brachii, the elbow joint bends towards your triceps brachii and the angle of the elbow joint is increased i.e. the triceps brachii is an extensor muscle of the elbow)

5

Isometric contractions

are the tensing of muscles without joint movement, such as when you hold an object in your hand.

6

Origin of the brachiocephalicus muscles

Base of the skull

7

Insertion of the brachiocephalicus muscle

Cranial humorous

8

What muscle... (forelimb)
Limb on ground:
Flexes neck
Bends neck laterally
Limb not weight bearing:
Primary protractor (draws forward) the limb
Extends shoulder

Brachiocephalicus

9

What muscle...(forelimb)
Secondary protractor (draws forward) the limb

Trapezius

10

What muscle...(forelimb)
Retracts the limb (limb moves back towards the body)
Flexes shoulder

Latissimus Dorsi

11

What muscle (forelimb)
Adducts the limb (limb drawn towards the midline)
Holds the limb against the body

Pectoral

12

Origin of the trapezius muscle

Dorsal midline from C2 - T9

13

Insertion of the trapezius muscle

Spine of scapular

14

Origin of the latissimus dorsi

Thoracic and lumbar spine

15

Insertion of the latissimus dorsi

Humerus

16

Origin of the pectoral muscles

Ribs and sternum

17

Insertion of the pectoral muscles

Humerus

18

Name the four extrinsic muscles of the pectoral girdle

Trapezius
Latissimus dorsi
Pectoral
Brachiocephalicus

19

Name the five intrinsic muscles of the pectoral girdle

Supraspinatus
Infraspinatus
Biceps brachii
Brachialis
Triceps brachii


20

Name the muscle that
Extends the shoulder joint

Supraspinatus

21

Name the muscle that...
Flexes the shoulder joint

Infraspinatus

22

Name the muscle that...
Flexes the shoulder joint

Biceps brachii

23

Name the muscle that...
Flexes the elbow joint

Brachialis

24

Name the muscle that...
Extends the elbow joint

Triceps brachii

25

Origin of the Supraspinatus muscle

Supraspinatus fossa

26

Insertion of the Supraspinatus muscle

Greater turbercle of humerus

27

Origin of the Infraspinatus muscle

Infraspinatus fossa

28

Origin of the biceps brachii

A turbercle of the scapular

29

Insertion of the biceps brachii

On the radius and ulna

30

Origin of the brachialis muscle

Humerus