Muscles of the Eye Flashcards
axes of the eye
- vertical= abduction/adduction
- transverse= elevation/depression
- anteroposterior= lateral/medial on superior pole
which ocular muscles do not have primary AND secondary movements?
MR
LR
role of lateral rectus
abducts the eye
brings gaze into the same plane as SR and IR
role of superior rectus
when in abduction it elevates the eye
role of inferior rectus
when in abduction, it depresses the eye
role of medial rectus
can only adduct the eye
brings eye into same plane as superior and inferior oblique
role of inferior oblique
when in adduction it elevates
role of superior oblique
when in adduction it depresses
innervation of the extraocular muscles
LR6 SO4 AO3
role of levator papillae superioris (and superior tarsal)
elevates the eyelid
what innervates levator papillae superioris?
CNIII
where do the 2 oblique muscles attach?
more posteriorly than the rectus muscles to the sclera
what does the superior oblique run through before connecting to the sclera?
loop of connective tissue called the trochlea before inserting at a right angle on the sclera
what do all the rectus muscles originate from?
common tendinous ring called the annulus ring
what does the superior oblique originate from?
sphenoid bone
