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KIN2320 Final > MUSCLES OF THE ORBIT > Flashcards

MUSCLES OF THE ORBIT Flashcards

1
Q

what are the muscles of the orbit?

A
  1. superior oblique (SO)
  2. inferior oblique (IO)
  3. superior rectus (SR)
  4. inferior rectus (IR)
  5. medial rectus (MR)
  6. lateral rectus (LR)
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2
Q

what cranial nerves innervate the muscles of the orbit?

A
  1. oculomotor (CN III)
  2. trochlear (CN IV)
  3. abducent (CN VI)
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3
Q

what muscles abduct the eye?

A
  1. superior oblique
  2. inferior oblique
  3. lateral rectus
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4
Q

what muscles adduct the eye?

A
  1. superior rectus
  2. inferior rectus
  3. medial rectus
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5
Q

what is the origin and insertion superior oblique?

A

origin: body of sphenoid
insertion: sclera deep to SR

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6
Q

what is the innervation of superior oblique?

A

trochlear nerve (CN IV)

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7
Q

what is the origin and insertion of inferior oblique?

A

origin: anterior floor of orbit
insertion: sclera deep to LR

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8
Q

what is the innervation of inferior oblique?

A

oculomotor nerve (CN III)

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9
Q

what is the origin and insertion of superior rectus?

A

origin: common tendinous ring
insertion: sclera posterior to corneoscleral junction

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10
Q

what is the innervation of superior rectus?

A

oculomotor nerve (CN III)

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11
Q

what is the origin and insertion of inferior rectus?

A

origin: common tendinous ring
insertion: sclera posterior to corneoscleral junction

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12
Q

what is the innervation of inferior rectus?

A

oculomotor nerve (CN III)

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13
Q

what is the origin and insertion of medial rectus?

A

origin: common tendinous ring
insertion: sclera posterior to corneoscleral junction

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14
Q

what is the innervation of medial rectus?

A

oculomotor nerve (CN III)

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15
Q

what is the origin and insertion of lateral rectus?

A

origin: common tendinous ring
insertion: sclera posterior to corneoscleral junction

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16
Q

what is the innervation of lateral rectus?

A

abducent nerve (CN VI)

17
Q

what are the movements of the eyeball?

A
  1. elevation
  2. depression
  3. adduction
  4. abduction

KIN2320 Final (10 decks)

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