Neck

Question 1

What muscle is parallel to posterior belly of digastric muscle?

Answer 1

Stylohyoid

Question 2

4 specializations of deep cervical fascia

Answer 2

1. investing fascia
2. pre-vertebral fascia: envelops vertebral mm.
3. pre-tracheal fascia: envelops trachea, esop, thyroid
4. carotid sheath

Question 3

carotid sheath contents

Answer 3

common carotid a., internal carotid a., internal jug vein, vagus n. (NOT EXTERNAL CAROTID A)

Question 4

branches of ext. carotid a.

Answer 4

superior thyroid a
ascending pharyngeal a
lingual a
facial a
occipital a
posterior auricular a
maxillary a
superficial temporal a.

Question 5

carotid sinus

Answer 5

dilation of internal carotid a
has baroreceptors (P sensors)
innervated by CN IX

Question 6

carotid body

Answer 6

has chemoreceptors (sense O2)
innervated by CNIX and CN X

Question 7

vertebral level of hyoid bone?

Answer 7

C3

Question 8

vertebral level of thyroid cartilage?

Answer 8

C4/C5

Question 9

vertebral level of cricoid cartilage?

Answer 9

C6

Question 10

What is the isthmus anterior to?

Answer 10

2nd, 3rd, 4th tracheal rings

Question 11

Where does the common carotid a. bifurcate?

Answer 11

superior border of thyroid cartilage

Question 12

importance of retropharyngeal space?

Answer 12

spread of infix: base of skull to posterior mediastinum

Question 13

what strap muscle is not innervated by ansa?

Answer 13

thyrohyoid m. (inn by C1 branch traveling with CN XII)

Question 14

retromandibular v. = ?

Answer 14

superficial temporal v. + maxillary v.

Question 15

ext. jugular v. = ?

Answer 15

retromandibular v. + posterior auricular v.

Question 16

divisions of anterior cervical triangle

Answer 16

submental triangle, submandibular triangle, muscular triangle, carotid triangle

Question 17

arterial supply to thyroid gland?

Answer 17

superior thyroid a. from ext. carotid a.,

inferior thyroid a. from thyrocervical trunk of subclavian a.

Question 18

venous drainage of thyroid gland?

Answer 18

superior/middle drain to int. jugular v.,

inferior thyroid v. is the only tributary of the brachiocephalic v.