Orbital Muscles/Innervation of the Extrinsic Muscles of the Eyeball/Orbital Blood Vessels Flashcards
What are the common characteristics in origin and insertion of all rectus extraocular muscles?
they all originate from a common annular tendon in the orbit
they all insert into the sclera in fron of the coronal equator of the eyeball
What is the common characteristic regarding the insertion of both oblique extraocular muscles?
both insert into the sclera on the lateral margin of the eyeball behind the coronal equator
What is the common characteristic concerning the insertion of the superior and inferior rectus extraocular muscles?
they insert into the sclera of the eyeball behind the coronal equator and are displaced slightly medially
What is the embryonic origin of the extraocular muscles of extrinsic muscles of the eyeball?
the skeletal muscle is derived from the somites hence somatic efferent (SE)
Which nerves will innervate specific extrinsic/extraocular muscles?
oculomotor - superior rectus, medial rectus, inferior rectus, inferior oblique,
trochlear - superior oblique
abducens/abducent - lateral rectus
What is unique about the vascular supply of the retina?
a single vessel supplies it
What vessel supplies the inner tunic of the eyeball?
central artery of the retina
