Final Exam Prep Flashcards
Which three eye muscles are abductors?
Superior and inferior obliques and lateral rectus
Which three eye muscles are adductors?
All rectuses except lateral rectus.
Superior, inferior, and medial
What is the action of levator palpebrae superioris?
Opens eyelid
Inferior oblique _______ the eye, where as inferior rectus lowers the eye.
elevates/raises
Superior oblique _______ the eye, where as superior rectus elevates the eye.
lowers
Which layer of the eye is continuous with the dural sheath of the optic nerve?
Sclera
Which layer of the eye is continuous with the sclera?
Cornea
Where is the choroid layer located?
Between the sclera and retina
Which is the inner most layer of the eye?
Retina
Which layer is a middle vascular coat?
Choroid middle layer Between the sclera and retina
Which muscle closes the eyelids? What is its innervation?
Orbicularis oculi. VII
Which muscle opens the upper eyelid?
Levator palpebrae superioris
Which eye muscles are under sympathetic control?
Superior tarsal.
Dilator pupillae
Which CN opens eye? Which one closes eye?
III. VII
What does the contraction of ciliary muscles do to the eye lens?
makes it rounder
What does the relaxation of ciliary muscles do to the eye lens?
makes it flatter
What two CN does the corneal reflex combine?
V (sensory) and VII (motor)
Which eye muscles are under parasympathetic control?
Ciliary muscles
Constrictor pupillae
Pupil dilation is under what autonomic innervation?
Sympathetic
Pupil constriction is under what autonomic innervation?
Parasympathetic (CN III)
Which larynx muscle is the only abductors (opens vocal cord)?
Posterior cricoarytenoid
Which three larynx muscles are adductors (closers) of vocal cords?
Lateral cricoarytenoid, thyroarytenoid, transverse arytenoids
Which larynx muscle relaxes the vocal cords?
Thyroarytenoid
Which larynx muscles tighten the vocal cords?
Cricothyroid and vocalis
What is the action oblique arytenoids?
Approximates epiglottis and arytenoids to close glottis
Which larynx muscle is the only one innervated by the external laryngeal nerve? What nerve innervates the others?
Cricothyroid.
Recurrent laryngeal.
Where does the blood supply to the larynx come from?
Superior and inferior laryngeal arteries
From what major arteries do the Superior and inferior laryngeal arteries originate?
External carotid –>Sup. Thyroid –> Sup. Laryngeal
Subclavian –> Thyrocervical trunk –> Inf. Thyroid–> Inf. Laryngeal
