Superficial Structures Of Neck

Question 1

Originate: Skin/fascia of infra and supraclavicular region

Insertion: lower border of mandible, skin of buccal (cheek region), lower lip, modiolus, orbicularis oris muscle.

Action: Depresses mandible and angle of mouth.

Answer 1

Platysma

Question 2

Originate:
Sternal head: Superior of anterior surface of manubrium sterni

Clavicle: Clavicle

Insertion: Mastoid process and superior nuchal line

Action: both working at the same time, extends the neck, elevates the clavicle and manubrium.

Answer 2

Sternocleidomastoid

Question 3

Originates: Superior nuchal line & external occipital protruberance and spinous process C7- T12 nuchal runs from occipital protruberance to C7

Insertion: Lateral 3rd clavicle, acronium and spine of scapula

Action:
Superior fibers: Raises the scapula/create a curve, rotates the scapula.

Answer 3

Trapezius

Question 4

Muscle of Superficial structures of the neck

Answer 4

Trapezius

Sternocleidomastoid

Platysma

Question 5

Origin, Insertion, Action, Fiber direction of Platysma

Answer 5

Origin: Fascia

Insertion:
Medial fibers- lower border of mandible
Lateral fibers- attach to the skin and subcutaneous tissue of the perioral region

Action: Depresses mandible

FD: Superior

Question 6

Origin, Insertion, Action and FD of Sternocleidomastoid

Answer 6

Origin:
Sternal- Manubrial of the sternum
Clavicular- The clavicle

Insertion: Mastoid process,lateral 1/2 of superior nuchal line

Action:
Bilateral- flexion,elevates clavicle and manubrium
Unilateral- ipsilateral flexion

FD: sup,post-lateral

Question 7

Origin,insertion,action and FD of trapezius

Answer 7

Origin: Superior nuchal line and external occipital protruberance and spinous process C7-T12. Nuchal runs from occipital protruberance to C7

Insertion: lateral 3rd clavicle, acronium and spine of scapula

Action:
Sup fibers: raises the scapula, rotates the scapula
Mid fibers: middle portion of spine to middle of scapula. Retracts the scapula
Inf fibers: Depress the scapula (pushes the shoulder down)

FD: Sup:inf-lat, Mid:lat, Inf:sup,lat