Neck Part 2

Question 1

infrahyoid muscles structure and location

Answer 1

set of 4 muscles in the left and right anterior triangles of the neck
they attach to the inferior aspect of the hyoid bone

Question 2

infrahyoid muscles function

Answer 2

upon contraction the infrahyoid muscles depress the hyoid bone
move larynx down during swallowing

Question 3

ansa cervicalis

Answer 3

loop in the neck
motor nerve supply to the infrahyoid muscles
usually lies on the anterior aspect of the internal jugular vein

Question 4

ansa cervicalis spinal cord origin

Answer 4

C1, C2, C3

Question 5

suprahyoid muscles and their function

Answer 5

digastric (anterior and posterior belly)
mylohyoid
elevate the hyoid bone during swallowing

Question 6

posterior triangle of the neck consists of

Answer 6

anterior scalene muscle and middle scalene muscle
brachial plexus
phrenic nerve
spinal accessory nerve

Question 7

brachial plexus exits and innervates

Answer 7

between the scalene muscles with the subclavian artery
innervates the upper limb

Question 8

brachial plexus is made of spinal nerves

Answer 8

C5, C6, C7, C8, T1

Question 9

phrenic nerve is made up of what spinal nerves and is the motor nerve to the

Answer 9

C3, C4, C5
diaphragm

Question 10

spinal accessory nerve innervates

Answer 10

sternocleidomastoid and trapezius muscles

Question 11

scalene triangle is made of and contains

Answer 11

made of the anterior and middle scalene muscles and the 1st rib
contains brachial plexus and subclavian artery

Question 12

neurovascular compression syndrome

Answer 12

symptoms: pallor, coldness and cyanosis in hands, numbness and tingling in fingers
cause: compression of subclavian artery and brachial plexus in the neck
ex: cases of cervical rib (extra rib in the neck region, above first rib)

Question 13

vessels in the posterior triangle

Answer 13

subclavian artery L and R
subclavian vein L and R

Question 14

subclavian artery

Answer 14

arises from brachiocephalic artery on the right side and from the arch of aorta on the left side
emerges between anterior and middle scalene muscles, passes below the clavicle and over the first rib

Question 15

subclavian vein

Answer 15

joins internal jugular vein to form brachiocephalic vein
crosses in front of scalenus anterior muscle
it is not in the scalene triangle
passes below the clavicle and over the first rib

Question 16

thyrocervical trunk

Answer 16

branch of the subclavian artery in the neck
gives inferior thyroid artery

Question 17

phrenic nerve spinal origin

Answer 17

C3, C4, C5

Question 18

phrenic nerve supplies ______ and lies on the surface of

Answer 18

supplies diaphragm
lies on the surface of the anterior scalene muscle