Lecture 4 - Deep Neck

Question 1

structures of deep neck

Answer 1

carotid sheath
phrenic nerve (just on top of anterior scalene muscles)
roots of brachial plexus

Question 2

carotid sheath

Answer 2

internal jugular vein
common carotid artery
vagus
ansa cervicalis (embedded in ant. surface of sheath)

Question 3

common carotid artery

Answer 3

branches into ext. and int. carotid
external carotid –> branches in neck
internal carotid –> no branches in neck (goes to brain)

Question 4

carotid body and sinus

Answer 4

body is chemoreceptor
- located at bifurcation of common carotid artery
sinus is baroreceptor
- swelling at the base of internal carotid

general viscerosensory information to CNS via CN 9
regulation of heart rate and blood pressure by ANS