Vision: Eye Muscles Flashcards
what do intrinsic muscles control?
pupil diameter and lens curvature
what do extrinsic eye muscles do?
move the eyeball
where do recti eye muscle arise from?
the apex of the eye
where does the superior oblique muscle arise from?
the roof of the orbit posteriorly
where does the inferior oblique muscle arise from?
the floor of the orbit anteriorly
what is the muscle of the eyelid called?
levator palpebrae superioris
where to the recti muscles insert into?
the sclera anteriorly
what does the trochlear nerve supply?
the superior oblique
what does the abducent nerve supply?
the lateral rectus muscle
what does the oculomotor nerve supply?
the levator palpebrae superioris, medial rectus, superior rectus, inferior rectus and inferior oblique
in terms of uniocular eye movement what is looking away from the nose called?
abduction
what is adduction in uniocular eye movement?
the eye looking towards the nose
what is intorsion?
when the top of the eye rotates towards your nose (rotating your head)
what is extorsion?
when the top of your eye rotates away from the nose (rotating your head)
what axis are the eye muscles attached along?
the orbital axis not the optical axis (so muscles will have more than one action on the eyeball)
