Lateral - Superficial Muscles

Question 1

Masseter Origin

Answer 1

Facial crest & zygomatic arch

Question 2

Masseter Insertion

Answer 2

lateral surface the ramus of the mandible

Question 3

Trapezius cervicis origin

Answer 3

Nuchal ligament

Question 4

Trapezius cervicis insertion

Answer 4

Free edge of scapula spine (entire length) - blends with shoulder & forelimb fascia

Question 5

Trapezius cervicis function

Answer 5

when activated, draws scapula cranially (forward) & dorsally (upward) and elevated the shoulder

Question 6

Trapezius thoracis origin

Answer 6

supraspinous ligament from T3-T10

Question 7

Trapezius thoracis insertion

Answer 7

ends on caudal portion of the tuberosity of the scapula spine

Question 8

Trapezius thoracis function

Answer 8

When activated, draws scapula caudally (backward) & dorsally (upward) and elevates the shoulder

Question 9

Brachiocephalicus origin

Answer 9

Mastoid process & nuchal crest of skull

Question 10

Brachiocephalicus insertion

Answer 10

Ends on deltoid tuberosity and the crest of the humerus

Question 11

Brachiocephalicus function

Answer 11

Protracts limb (draws forward)- prime limb mover when head & neck are fixed
When one side contracted, muscle bends the neck laterally toward shortened side

Question 12

Omotransversarius origin

Answer 12

Transverse process of C2-4 and continues to wing of atlas

Question 13

Omotransversarius insertion

Answer 13

deltoid tuberosity + shoulder fascia

Question 14

Omotransversarius fucntion

Answer 14

protracts the limb + when one side contracted it bends neck laterally towards the shortened side

Question 15

Deltoideus origin

Answer 15

scapula

Question 16

Deltoideus insertion

Answer 16

deltoid tuberosity & bony ridge running proximally from it towards the greater tubercle

Question 17

Deltoideus function

Answer 17

when activated, flexes shoulder joint + lateral rotation + abduction