Superficial Muscles of the Neck

Question 1

Innervation of Platysma

Answer 1

Cervical Branch of CN VII

Question 2

Origin of Platysma

Answer 2

Superficial fascia of the thorax overlying the Pec Major and Deltoid

Question 3

Insertion of Platysma

Answer 3

Blends with muscle of the face

Question 4

Innervation of Trapezius

Answer 4

CN XI with C3,C4

Question 5

Innervation of SCM

Answer 5

CN XI

Question 6

Origin of SCM

Answer 6

Manubrium of sternum and medial 1/3 of clavicle

Question 7

Insertion of SCM

Answer 7

Lateral aspect of mastoid process of temporal bone

Question 8

Action of SCM

Answer 8

Rotates the head opposite the contracted side, laterally flexes the neck, bilaterally flexes the neck

Question 9

Origin of Anterior belly of Digastric

Answer 9

Digastric fossa on lower inside of mandible

Question 10

Insertion of Anterior belly of Digastric

Answer 10

Attachment of tendon between two bellies to body of hyoid bone

Question 11

Innervation of Anterior belly of Digastric

Answer 11

V3

Question 12

Action of Anterior belly of Digastric

Answer 12

Raises hyoid bone, opens mouth be lowering mandible

Question 13

Origin of Posterior belly of Digastric

Answer 13

Mastoid notch on medial side of mastoid process of temporal bone

Question 14

Insertion of Posterior belly of Digastric

Answer 14

Attachment of tendon between two bellies to body of hyoid bone

Question 15

Innervation of Posterior belly of Digastric

Answer 15

CN VII

Question 16

Action of Posterior belly of Digastric

Answer 16

Pulls hyoid bone upward and back