Flashcards in Vision - Muscles and Neural Pathways Deck (35)
What are the different types of ocular muscles?
What is the role of the intrinsic muscles?
Control pupil diameter
Help alter lens curvature
What is the role of the extrinsic muscles?
Move the eye
How many extrinsic muscles are there?
How many and what are the recti muscles?
4 recti muscles
How many and what are the oblique muscles?
Where do the recti muscles arise from?
Apex of the orbit from an annular fibrous ring
Where does the superior oblique arise from?
Roof of the orbit posteriorly
Where does the inferior oblique arise from?
Floor of the orbit anteriorly
What muscle elevates the upper eyelid?
Levator palpeerde superioris
What nerve innervates the superior oblique?
What nerve innervates the lateral rectus?
What nerve innervates the majority of extrinsic muscles?
What axis are the extrinsic muscles attached along?
What does the medial rectus cause?
Adduction of eyeball
What does the lateral rectus cause?
Abduction of eyeball
What is the primary action of the superior rectus?
What is the primary action of the inferior rectus?
What is the primary action of the superior oblique?
What is the primary action of the inferior oblique?
What is a strabismus?
What is the cause of strabismus?
Misalignment of the eyes
What is esotropia?
What is exotropia?
What are the consequences of a squint?
Amblyopia (lazy eye)
Diplopia (double vision)
What are the intrinsic muscles of the eye?
What is the result of right optic nerve damage?
Blindness in one eye
What is the result of optic chiasma disruption?
What is the result of right optic tract damage?
Contralateral homonymous hemianopia