Vessels Of Head And Neck 2

Question 1

Carotid sinus

Answer 1

At origin of internal carotid artery

Regulates systematic blood pressure (baroreceptors)

Question 2

What are the four portions that the internal carotid artery are divided into?

Answer 2

Cervical portion, petrous portion, Caverness portion, cerebral portion

Question 3

Path of the internal carotid artery

Answer 3

The internal carotid artery continues up in the carotid sheath, passing anterior to the superior cervical ganglion (part of cervical sympathetic chain), The prevertebral muscles and TPs of C-spine

Question 4

Carotid triangle boundaries

Answer 4

Anteroinferiorly by superior belly of omohyoid, anteriosuperiorly by posterior belly of diagastric and stylohyoid, posteriorly by SCM

Question 5

Does the cervical portion of the ICA have branches?

Answer 5

No branches

Question 6

What are the branches of the petrous portion of the ICA?

Answer 6

Caroticotympanic & artery of pterygoid canal

Question 7

Where is the petrous portion of the ICA located?

Answer 7

Within the carotid canal, within the petrous portion of the temporal bone. It’s shaped like a tipped over L primarily horizontal

Question 8

What nerves are in close relation to the Caverness portion of the ICA

Answer 8

CN3, CN4, CNV1, CN6

Question 9

What is the clinical significance of the middle cerebral artery?

Answer 9

This artery is responsible for bringing oxygen to many portions of the brain and is often blocked off during a stroke.
The middle cerebral artery is a terminal branch of the cerebral portion of the internal carotid artery. It’s the largest branch that runs in the lateral cerebral Fisher, forms in anastomosis with anterior and posterior cerebral arteries

Question 10

What branches contribute to the circle of Willis?

Answer 10

Anterior cerebral artery (w/ anterior communicating branch)
ICA (cerebral part)
Posterior communicating artery
Posterior cerebral artery

Question 11

What is the circle of Willis?

Circulus arteriosus

Answer 11

Circular anastomosis between ICA and V-B. Situated at base of brain in interpeduncular fossa surrounding optic chiasma, pituitary, etc.

Question 12

Arteries of scalp

Answer 12

Supratrochlear
Supraorbital
Superior temporal
Posterior auricular
Occipital

Question 13

Subclavian artery

Answer 13

Arise at bifurcation of brachiocephalic trunk into common carotid artery and subclavian on RIGHT
And from aortic arch on LEFT

Question 14

What gives off the right recurrent laryngeal nerve?

Answer 14

Vagus nerve on right side

Question 15

How are the three parts of the subclavian artery divided?

Answer 15

1st part: medial to anterior scalene
Vertebral artery, internal thoracic artery, Thyrocervical trunk

2nd part: posterior to anterior scalene
Costocervical trunk

3rd part: lateral border of anterior scalene to lateral border of first rib
Dorsal scapular artery

Question 16

Internal jugular vein (IJV)

Answer 16

• Deep to SCM
• Drains majority of blood from head and neck
• originates at jugular foramen

Question 17

Tributaries of internal jugular vein

Answer 17

IPCLSM (o)

Inferior petrosal sinus
Pharyngeal vein
Common facial vein
Lingual vein
Superior thyroid vein
Middle thyroid vein
occipital vein (sometimes)

Question 18

External jugular vein origin

Answer 18

Begins and prodded gland by union of posterior a retromandibular veins

Question 19

External jugular vein tributaries

Answer 19

Transverse cervical vein
Suprascapular vein
Anterior jugular vein

Question 20

Dipolic veins

Answer 20

Occupy channels within dipole of cranial bones