Head & Neck — Flashcards

Flashcard 31: The common carotid artery bifurcates at the level of _____

Answer: C4

Flashcard 32: The _____ is often involved in rheumatoid arthritis as this joint provides a large amount of rotational mobility in the cervical spine

Answer: atlantoaxial joint

Flashcard 33: CN I exits the skull through the _____

Answer: cribriform foramina

Flashcard 34: Lesser actions of the superior oblique muscle are _____ and intorsion

Answer: abduction

Flashcard 35: _____ humor fills the anterior and posterior chambers of the eye

Answer: Aqueous

Extra: Flow of aqueous humor Aqueous humor maintains intraocular pressure and nourishes the lens and cornea. It is produced by folds in the ciliary epithelium called ciliary processes. After aqueous humor is secreted in the posterior chamber, it flows through the pupil into the anterior chamber. The greater part of aqueous humor drains via Schlemm's canal into the scleral venous sinus. A small portion (15%) enters the extracellular space of the uvea and sclera (uveoscleral pathway). Intraocular lens The lens of the eye is covered at its lateral margin by the iris and lies directly behind the pupil. The lens capsule surrounds the lens entirely, providing structural support. On the anterior portion of the lens, between the lens capsule and the lens fibers, lies the single-layer epithelium, which homeostatically regulates the lens and continuously produces new lens fibers. Lens fibers form the bulk of the lens, with new fibers forming a shell around the old fibers, creating a structure of newer outer fibers and older core fibers.

Flashcard 36: Zenker diverticulum classically arises at _____, between the thyropharyngeal and cricopharyngeal parts of the inferior pharyngeal constrictor

Answer: Killian's triangle

Flashcard 37: Fractures to the orbital floor can entrap the _____ muscle, impairing vertical gaze

Answer: inferior rectus

Flashcard 38: Rhinosinusitis most commonly affects the _____ sinus in adults

Answer: maxillary

Flashcard 39: The semicircular canals of the inner ear are filled with _____

Answer: endolymph

Flashcard 40: Which tongue muscle draws the sides of the tongue upwards (creates a trough for swallowing)? _____

Answer: Styloglossus