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Anatomy > Extraocular Muscles (extrinsic muscles) - move superior eyelid and eyball > Flashcards

Extraocular Muscles (extrinsic muscles) - move superior eyelid and eyball Flashcards

1
Q

What are the Extraocular Muscles?

A

Superior Rectus, Medial Rectus, Lateral Rectus, Inferior Rectus, Superior Oblique, Inferior Oblique, Levator Palpebrae Superioris

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2
Q

What is the origin of the Superior Rectus muscle?

A

common tendinous ring

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3
Q

What is the insertion of the Superior Rectus muscle?

A

sclera of eyeball

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4
Q

What is the innervation of the Superior Rectus muscle?

A

CN III oculomotor nerve

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5
Q

What is the blood supply of the Superior Rectus muscle?

A

ophthalmic artery

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6
Q

What is the action of the Superior Rectus muscle?

A

rotate pupils superiorly and medially

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7
Q

What is the origin of the Medial Rectus muscle?

A

common tendinous ring

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8
Q

What is the insertion of the Medial Rectus muscle?

A

sclera of eyeball

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9
Q

What is the innervation of the Medial Rectus muscle?

A

CN III oculomotor nerve

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10
Q

What is the blood supply of the Medial Rectus muscle?

A

ophthalmic artery

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11
Q

What is the action of the Medial Rectus muscle?

A

rotate the pupils medially

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12
Q

What is noteworthy about the Medial Rectus muscle?

A

opposes Lateral Rectus muscle

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13
Q

What is the origin of the Lateral Rectus muscle?

A

common tendinous ring

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14
Q

What is the insertion of the Lateral Rectus muscle?

A

sclera of eyeball

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15
Q

What is the innervation of the Lateral Rectus muscle?

A

CN VI abducent nerve

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16
Q

What is the blood supply of the Lateral Rectus muscle?

A

ophthalmic artery

17
Q

What is the action of the lateral rectus muscle?

A

rotate pupils laterally

18
Q

What is noteworthy about the lateral rectus muscle?

A

loss of function will cause eye to be abducted

19
Q

What is the origin of the Inferior Rectus muscle?

A

common tendinous ring

20
Q

What is the insertion of the Inferior Rectus muscle?

A

sclera of eyeball

21
Q

What is the innervation of the Inferior Rectus muscle?

A

CN III oculomotor nerve

22
Q

What is the blood supply of the Inferior Rectus muscle?

A

ophthalmic artery

23
Q

What is the action of the Inferior Rectus muscle?

A

rotate pupils inferiorly and medially

24
Q

What is the origin of the Superior Oblique muscle?

A

apex of orbit above optic canal

25
Q

What is the insertion of the Superior Oblique muscle?

A

sclera of eyeball

26
Q

What is the innervation of the Superior Oblique muscle?

A

CN IV trochlear nerve

27
Q

What is the blood supply of the Superior Oblique muscle?

A

ophthalmic artery

28
Q

What is the action of the Superior Oblique muscle?

A

abducts, depresses and rotates pupils laterally

29
Q

What is noteworthy about the Superior Oblique muscle?

A

passes through the trochlea (pulley)

30
Q

What is the origin of the Inferior Oblique muscle?

A

floor of orbit lateral to lacrimal groove

31
Q

What is the insertion of the Inferior Oblique muscle?

A

sclera of eyeball

32
Q

What is the innervation of the Inferior Oblique muscle?

A

CN III oculomotor nerve

33
Q

What is the blood supply of the Inferior Oblique muscle?

A

Ophthalmic artery

34
Q

What is the action of the Inferior Oblique muscle?

A

abducts, elevates and rotates pupils laterally

35
Q

What is the origin of the Levator Palpebrae Superioris muscle?

A

apex of orbit above optic canal

36
Q

What is the insertion of the Levator Palpebrae Superioris muscle?

A

skin and fascia of upper eyelid

37
Q

What is the innervation of the Levator Palpebrae Superioris muscle?

A

CN III oculomotor nerve

38
Q

What is the blood supply of the Levator Palpebrae Superioris muscle?

A

ophthalmic artery

39
Q

What is the action of the Levator Palpebrae Superioris muscle?

A

elevates superior eyelid

Anatomy (17 decks)

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