Vasculature of the Head and Neck Flashcards
(41 cards)
a cricothyrotomy can be complicated by what vein?
anterior jugular vein
jugular venous pressure/pulse can indicate what?
heart problems
cavernous sinus thrombosis is caused by drainage from what vein?
superior and inferior angular veins (near nasal area) through ophthalmic veins to cavernous sinus
describe the middle meningial a.
- supply dura and calvaria
- pterion - site of damage
- epidural hematoma site
- enters via foramen spinosum
what structures run through the cavernous sinus?
- internal carotid a., CN III, IV, V1, V2, VI run through
- CN II just runs in front
- pituitary sits inside it
name the 4 regions of the internal carotid artery
also know the relative areas within the skull where the divisions are
which foramen does the ophthalmic artery exit the skull, and which areas does it supply?
- optic canal
- all parts of orbit: retina, extraocular muscles, lacrimal gland
- ethmoid bone (nasal cavity)
- superficial branches that supply facial tissues around the eye: dorsal nasal, frontal (supratrochlear), and supraorbital
where does the superior thyroid a. come off of the external carotid a.?
ventral
describe the anastomoses that can occur with the superior thyroid a.
contralateral superior thyroid artery (ex. carotid a.) and inferior thyroid artery (thyrocervical a.)
name the 4 branches of the superior thyroid a. and what they supply. where does the branching start (which triangle)?
- superior laryngeal - larynx
- cricothyroid - larynx
- hyoid - strap muscles adjacent to hyoid bone
- SCM - sternocleidomastoid
- branching starts in carotid triangle
where does the ascending pharyngeal a. go? name its branches
- ascends deep to stylopharyngeus, anterior to ear
- pharyngeal, meningeal, and tympanic branches
what does the ascending pharyngeal artery supply?
- pharyngeal constrictors
- stylopharyngeus
- soft palate
- all soft palate muscles except levator veli palatini (middle meningeal artery)
- palatine tonsil
- meninges
- middle ear
- auditory tube
where does the superficial temporal a. go?
ascends within parotid gland, anterior to ear
where does the occipital a. go?
runs deep to posterior belly of digastric
what are the branches of the occipital a., and what do they supply?
- SCM branch - SCM
- auricular branch - posterior aspect of ear
- meningeal branch - posterior dura and cranial bones
- descending branch - suboccipital and deep back muscles of the neck
describe anastomoses created by the occipital a.
- descending branch of the occipital a., transverse cervical a. (thyrocervical trunk), and vertebral a.
what are the 3 parts of the maxillary artery and the general regions they supply?
- mandibular - ear and mandible
- pterygoid - muscles of mastication
- pterygopalatine - maxilla, palate, nasal
describe the branches of the mandibular portion of the maxillary artery that run inferiorly
- mylohyoid branch - serves mylohyoid
- inferior alveolar - teeth and gums, ends as mental a.
- mental - chin and lower lip, anastomosis with submental and inferior labial aa.
describe the branches of the mandibular portion of the maxillary artery that run superiorly
- deep auricular - TMJ, tympanic membrane, external acoustic meatus
- ant. tympanic - middle ear cavity
- middle meningial a.
name the 4 branches in the pterygoid portion of the maxillary artery (hint - serves muscles of mastication)
- temporal branch - runs superior
- masseteric branch - runs inferior
- pterygoid branches - run inferior
- buccal branch - runs inferior
name the 4 main branches of the pterygopalatine portion of the maxillary artery and their respective branches
- infraorbital (infraorbital foramen): superior alveolar - anterior/supply front teeth
- superior alveolar - middle and posterior branches
- descending palatine: greater and lesser palatine aa. (greater and lesser palatine foramen)
- sphenopalatine: posterior nasal and posterior septal branches
T or F:
the nasal wall and septum are supplied by the external carotid only
false:
vascular supply by both ICA and ECA
- ICA: ophthalmic a. - anterior and posterior ethmoidal aa.
- ECA: maxillary a. - sphenopalatine a. - posterior septal and nasal aa.
describe Kiesselbach’s area
anastomoses of 4 arteries in nasal wall and septum (bloody nose here)
- ethmoidal a. (ophthalmic a.)
- septal a. (maxillary a.)
- greater palatine a. (maxillary a.)
- superior labial a. (facial a.)
what sits in the sella turcica?
- cavernous sinus
- pituitary gland
