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Muscles O,I&A's > Extraoccular, Circumorbital musclesmuscles > Flashcards

Extraoccular, Circumorbital musclesmuscles Flashcards

1
Q

Origin of Inferior Rectus

A

Common tendinous ring at the apex of the orbit

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2
Q

Insertion of Inferior Rectus

A

Sclera on the inferior surface of the eyeball

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3
Q

Action of Inferior Rectus

A

Depresses and adducts the corneal part of the eyeball: Rotates the superior pole of the iris laterally

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4
Q

Origin of Medial Rectus

A

Common tendinous ring at the apex of the orbit

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5
Q

Insertion of Medial Rectus

A

Sclera on the medial surface of the eyeball

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6
Q

Action of Medial Rectus

A

Adducts the corneal part of the eyeball

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7
Q

Origin of Lateral Rectus

A

Common tendinous ring at the apex of the orbit

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8
Q

Insertion of Lateral Rectus

A

Sclera on the lateral surface of the eyeball

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9
Q

Action of Lateral Rectus

A

Abducts the corneal part of the eyeball

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10
Q

Origin of the Superior Rectus

A

Common tendinous ring at the apex of the orbit

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11
Q

Insertion of Superior Rectus

A

Sclera on the superior surface of the eyeball

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12
Q

Action of Superior Rectus

A

Elevates and adducts the eyeball; rotates the superior pole of the iris medially

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13
Q

Origin of Superior Oblique

A

Apex of the orbit above the optic canal

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14
Q

Insertion of Superior Oblique

A

Sclera on the posterior superior surface of the eyeball

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15
Q

Action of Superior Oblique

A

Depresses and abducts the eyeball, rotates the superior pole of the iris medially

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16
Q

Origin of Inferior Oblique

A

Floor of the orbit lateral to the lacrimal groove

17
Q

Insertion of Inferior Oblique

A

Sclera on the inferior surface of the eyeball

18
Q

Action of Inferior Oblique

A

Elevates and abduct the corneal part of the eye
Rotates the superior pole of the iris laterally
When eye is abducted, it elevates the cornea

19
Q

Origin of Levator Palpebrae Superioris

A

Apex of the orbit above the optic canal

20
Q

Insertion of Levator Palpebrae Superioris

A

Skin and fascia of upper eyelid and the superior tarsal plate

21
Q

Action of Levator Palpebrae Superioris

A

Elevates the upper eyelid

22
Q

Origin of Corrugator

A

Medial part of the superciliary arch

23
Q

Insertion of Corrugator

A

Skin of the medial half of the eyebrow

24
Q

Action of Corrugator

A

Pulls the eyebrow together medially

25
Q

Origin of Depressor Supercilii

A

Frontal process of maxilla

26
Q

Insertion of Depressor Supercilii

A

Skin of eyebrow

27
Q

Action of Depressor Supercilii

A

Depresses the eyebrows

28
Q

Origin of Orbicularis Oculi

A

Orbital part: Medial orbital margin and the medial palpebral ligament
Palpebral part: Medial palpebral ligament

29
Q

Insertion Orbicularis Oculi

A

Orbital part: skin of lateral cheek
Palpebral part: lateral palpebral raphe

30
Q

Action Orbicularis Oculi

A

Closes the eyelid

Muscles O,I&A's (27 decks)

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