Neck Myology

Question 1

What are the borders of the Posterior Triangle of the neck?

Answer 1

Anterior: Posterior Edge of Sternocleidomastoid M.

Posterior: Anterior Edge of Trapezius M.

Inferior: Clavicle

Question 2

What are the contents of the Posterior Triangle of the neck?

Answer 2

Levator Scapulae M.

Anterior, middle, and posterior scalene M.s.

Inferior belly of Omohyoid M.

Splenius Capitus M.

Question 3

What divides the Occipital Triangle and the Supraclavicular Triangle?

Answer 3

Inferior belly of Omohyoid M.

Question 4

What are the contents of the supraclavicular triangle?

Answer 4

3rd part of subclavian A.

Suprascapular A.

Question 5

What does the spinal accessory N. innervate? Which cranial N. is it?

Answer 5

CN XI

Innervates Sternocleidomastoid M. and Trapezius M.

Question 6

A pt with a fibrous tissue tumor within the Sternocleidomastoid M. will most likely present with what disorder?

Answer 6

Congenital torticollis

Question 7

A patient presenting with abnormal tonicity of the sternocleidomastoid and trapezius Ms. most likely has what disorder?

Answer 7

Spasmodic torticullis

Question 8

A patient with a hematoma impinging on the Spinal Accessory N. most likely has what disorder?

Answer 8

Congenital Torticullis

Question 9

What are the borders of the Anterior Triangle?

Answer 9

Median Line of the Neck

Sternocleidomastoid M.

Mandible

Question 10

What are the muscular contents of the Anterior Triangle?

Answer 10

Mylohyoid M.

Geniohyoid M.

Digastric M.

Stylohyoid M.

Sternohyoid M.

Sternothyroid M.

Thyrohyoid M.

Superior Belly of Omohyoid M.

Question 11

What divides the Submental Triangle from the Submandibular Triangle?

Answer 11

Anterior Belly of Digastric M.

Question 12

What are the contents of the Submental Triangle?

Answer 12

Submental A.

Submental LNs

Small veins

Question 13

What are the contents of the submandibular Triangle?

Answer 13

Submandibular gland

Hypoglossal N.

Nerve to Mylohyoid M.

Parts of Facial A.

Question 14

What divides the Muscular triangle from the Carotid Triangle?

Answer 14

Superior Belly of the Omohyoid M.

Question 15

What are the contents of the Muscular triangle?

Answer 15

Thyroid Gland

Parathyroid Glands

Question 16

What are the contents of the Carotid triangle?

Answer 16

Common Carotid A.

Internal Jugular V.

Vagus N.

Hypoglossal N.

Spinal Accessory N.

Superior root of Ansa Cervicalis

Thyroid Gland

Larynx, Pharynx

Branches of cervical plexus

Question 17

What are the suprahyoid muscles?

Answer 17

Mylohyoid M.

Geniohyoid M.

Digastric M.

Stylohyoid M.

Question 18

What is the innervation of the Geniohyoid M.?

Answer 18

C1 via Hypoglossal N.

Question 19

What does the Mylohyoid N. innervate?

Answer 19

Mylohyoid M.

Anterior belly of Digastric M.

Question 20

What is the posterior belly of Digastric M. innervated by?

Answer 20

Facial N.

Question 21

What is the Stylohyoid M. Innervated by?

Answer 21

Facial N.

Question 22

What are the Infrahyoid Ms.?

Answer 22

Sternohyoid M.

Sternothyroid M.

Thyrohyoid M.

Omohyoid M.

Question 23

What does the Ansa Cervicalis innervate?

Answer 23

Sternohyoid M. (C1-3)

Sternothyroid M. (C2,3)

Omohyoid M. (C1-3)

Question 24

What is the thyrohyoid M. Innervated by?

Answer 24

C1 via Hypoglossal N.

Question 25

What is the action and innervation of the Platysma M.?

Answer 25

Draws corners of mouth down, skin of neck up (Yikes face) Cervical Branch of Facial N.

Question 26

Where doe the pharyngeal constrictor muscles insert?

Answer 26

Median Raphe of Pharynx

Question 27

What are the pharyngeal constrictor muscles innervated by?

Answer 27

Pharyngeal Branch of Vagus N. and Pharyngeal Plexus Middle and Inferior pharyngeal constrictor ms. also innervated by branches of Recurrent Laryngeal N.

Question 28

What are the muscles that elevate the pharynx?

Answer 28

Palatopharyngeus M. Salpingopharyngeus M. Stylopharyngeus M. Stlyloglossus M.

Question 29

What innervates the Palatopharyngeus and Salpingopharyngeus Ms.?

Answer 29

Pharyngeal branch of Vagus N. and Pharyngeal Plexus

Question 30

What innervates the stylopharyngeus M.?

Answer 30

Glossopharyngeal N.

Question 31

What is the innervation of the Cricothyroid M.?

Answer 31

External Laryngeal N.

Question 32

What laryngeal ms. are innervated by the Recurrent Laryngeal N.?

Answer 32

Posterior Cricoarytenoid M. Lateral Cricoarytenoid M. Transverse Arytenoid M. Oblique Arytenoid M. Aryepiglottic M. Thyroarytenoid M. Vocalis M. (All except Cricothyroid M.)

Question 33

Which zone of penetrating neck trauma is the most common, most dangerous, but the easiest to fix?

Answer 33

Zone 2

Question 34

What does Zone 1 of penetrating neck trauma encompass?

Answer 34

Clavicle to Cricoid Cartilage

Question 35

What does Zone 2 of penetrating neck trauma encompass?

Answer 35

Cricoid cartilage to angle of mandible

Question 36

What does Zone 3 of penetrating neck trauma encompass

Answer 36

Angle of mandible to base of skull