Orbital Muscles/Innervation of the Extrinsic Muscles of the Eyeball/Orbital Blood Vessels Flashcards Preview

Spinal Exam 3 > Orbital Muscles/Innervation of the Extrinsic Muscles of the Eyeball/Orbital Blood Vessels > Flashcards

Flashcards in Orbital Muscles/Innervation of the Extrinsic Muscles of the Eyeball/Orbital Blood Vessels Deck (7)
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1
Q

What are the common characteristics in origin and insertion of all rectus extraocular muscles?

A

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

2
Q

What is the common characteristic regarding the insertion of both oblique extraocular muscles?

A

both insert into the sclera on the lateral margin of the eyeball behind the coronal equator

3
Q

What is the common characteristic concerning the insertion of the superior and inferior rectus extraocular muscles?

A

they insert into the sclera of the eyeball behind the coronal equator and are displaced slightly medially

4
Q

What is the embryonic origin of the extraocular muscles of extrinsic muscles of the eyeball?

A

the skeletal muscle is derived from the somites hence somatic efferent (SE)

5
Q

Which nerves will innervate specific extrinsic/extraocular muscles?

A

oculomotor - superior rectus, medial rectus, inferior rectus, inferior oblique,

trochlear - superior oblique

abducens/abducent - lateral rectus

6
Q

What is unique about the vascular supply of the retina?

A

a single vessel supplies it

7
Q

What vessel supplies the inner tunic of the eyeball?

A

central artery of the retina

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