MUSCLES OF THE EYEBALL Flashcards by ASIVE PLAATJIE

Q

Muscles that move the eyeball within the orbit

A

Extrinsic muscles

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Q

Muscles that affect the size of the pupil and lens

A

Intrinsic muscles

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Q

Origin of superior oblique

A

Body of sphenoid bone

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Q

Insertion of superior oblique

A

Superior surface of eyeball

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Q

Innervation of superior oblique

A

Trochlear nerve

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Q

Origin of inferior oblique

A

Maxillary bone, lateral to nasolacrimal groove

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Q

Insertion of inferior oblique

A

Inferior surface of eyeball

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Q

Innervation of inferior oblique

A

Oculomotor nerve

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Q

Origin of superior rectus

A

Superior part of common tendinous ring

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Q

Insertion of superior rectus

A

Anterior half of the eyeball, superiorly

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Q

Innervation of superior rectus

A

Oculomotor nerve

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Q

Origin of inferior rectus

A

Inferior part of common tendinous ring

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Q

Insertion of inferior rectus

A

Anterior half of eyeball, inferiorly

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Q

Innervation of inferior rectus

A

Oculomotor nerve

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Q

Origin of lateral rectus

A

Lateral part of common tendinous ring

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Q

Insertion of lateral rectus

A

Anterior half of eyeball, laterally

Q

Innervation of lateral rectus

A

Abducens nerve

Q

Origin of medial rectus

A

Medial part of common tendinous ring

Q

Insertion of medial rectus

A

Anterior half of eyeball, medially

Q

Innervation of medial rectus

A

Oculomotor nerve

Q

Origin of levator palpabrae superioris

A

Lesser wing of the sphenoid bone

Q

Insertion of levator palpabrae superioris

A

Anterior surface of tarsal plate

Q

Innervation of levator plapabrae superioris

A

Occulomotor nerve

Q

Action of superior oblique

A

Depression, Abduction

Action of superior rectus

Elevation, Adduction

Action of inferior oblique

Elevation, Abduction

Action of inferior rectus

Depression, Adduction

Action of lateral rectus

Abduction

Action of medial rectus

Adduction

Which fibres in the iris decrease the size of the pupil

Circular muscles

Which fibres in the iris increase the size of the pupil

Radial muscles

What causes the lens to become round(Near vision)

Contraction of ciliary body

What causes the lens to become round(Near vision)

Contraction of ciliary body

What causes the lens to be flat(Distant vision)

Relaxation of ciliary body