Extrinsic Forelimb Muscles

Question 1

what are extrinsic forelimb muscles?

Answer 1

those that link the trunk to the scapula/humerus

Question 2

what are intrinsic forelimb muscles?

Answer 2

those that originate in the forelimb (scapula and more distal structures)

Question 3

what is the purpose of the extrinsic forelimb muscles?

Answer 3

sling to support pectoral girdle, move scapula

Question 4

where does the omotransversarius originate and insert?

Answer 4

originate: cervical vertebrae
insert: spine of scapula

Question 5

where does the latissimus dorsi originate and insert?

Answer 5

originate: lumbar vertebrae
inserts: teres major tuberosity

Question 6

label the yellow circled muscles

Answer 6

3: omotransversarius
5: trapezius
7: latissimus dorsi

Question 7

where does the braciocephalicus originate and insert?

Answer 7

originate: cervical vertebrae
insert: scapula

Question 8

label structure A and the green circled muscles

what does 2 + 2’ make?

Answer 8

2: cleidocephalicus

2’: cleidobrachialis

A: clavicle

makes the brachiocephalicus

Question 9

label the yellow circled muscles

what are 5 + 6 also known as? what about 7?

Answer 9

5: pectoralis descendens
6: pectoralis transversus
7: pectoralis profundus

5 + 6: pectoralis superficialis

7: deep pectoralis

Question 10

label the yellow circled muscle

Answer 10

serratus ventralis

Question 11

what is another name for the pectoralis profundus? (not deep pectoralis)

Answer 11

ascending pectoralis

Question 12

how do the fiber orientations of the superficial and deep pectorals differ?

Answer 12

superficial: run perpendicular to spine
deep: run parallel to spine

Question 13

label the red circled muscles

Answer 13

1: serratus ventralis
2: subclavius

Question 14

label this image

Answer 14

A: latissimus dorsi

D: trapezius

Question 15

label this image

Answer 15

A: cervical part of trapezius

B: thoracic part of trapezius

C: latissimus dorsi

D: rhomboideus

Question 16

label this image

Answer 16

A: pectoralis descendens

B: pectoralis transversus

C: pectoralis profundus

Question 17

label structure A

Answer 17

pectoralis superficialis

Question 18

label this image

Answer 18

A: cleidocephalicus

B: cleidobrachialis

C: clavivle

Question 19

label this image

Answer 19

A: rhomboideus

B: latissimus dorsi

Question 20

label this image

what is the structure under the letter C?

Answer 20

A: latissimus dorsi

B: trapezius (thoracic)

C: omotransversarius

under letter C: trapezius (cervical)

Question 21

label structure A

Answer 21

omotransversarius

Question 22

label this image

Answer 22

A: trapezius

B: rhomboideus

Question 23

label this image

what structure is under the muscle B?

Answer 23

A: latissimus dorsi

B: cervical trapezius

C: thoracic trapezius

D: brachiocephalicus

E: rhomboideus

F: pectoralis profundus

under B: serratus ventralis

Question 24

label this image

Answer 24

A: trapezius

B: pectoralis profundus

C: omotransversarius

D: brachiocephalicus

E: rhomboideus

F: latissimus dorsi

Question 25

what is structure A?

Answer 25

rhomboideus

Question 26

this is a ventral view of the forelimb what are mm A, B, and C?

Answer 26

A: pectoralis profundus B: pectoralis transversus C: pectoralis descendens

Question 27

label this image

Answer 27

A: latissimus dorsi B: trapezius (cut) C: brachiocephalicus D: omotransversarius

Question 28

what structure is being pointed to?

Answer 28

serratus ventralis

Question 29

what are mm A and B?

Answer 29

A: cleidobrachialis B: cleidocephalicus

Question 30

label these muscles

Answer 30

A: cervical trapezius B: thoracic trapezius C: latissimus dorsi

Question 31

what is mm A?

Answer 31

rhomboideus