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kmk ocular anatomy > EOMs > Flashcards

EOMs Flashcards

1
Q

Blood supply and nerve supply for EOM?

A

More dense and finely tuned

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2
Q

EOM movements are more faster and more fatigued resistant due to?

A

white (fast) and red (slow but sustaining) muscle fibers

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3
Q

Primary action of obliques?

A

torsion

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4
Q

Superiors always?

A

intort

Superior oblique and superior rectus muscles contribute to this

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5
Q

Obliques always?

A

abduct

Superior oblique and inferior obliques cause abduction

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6
Q

Lateral rectus primary action?

A

Abduction

There are no secondary and tertiary actions

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7
Q

Lateral rectus origin is?

A

CTR –> Common tendenious ring

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8
Q

Lateral rectus innervated by which nerve and which blood supply?

A

Abducences nerve and lacrimal artery (which is part of the ophthalmic artery)

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9
Q

Medial rectus primary action is?

A

ADDuction
There is no secondary or tertiary actions
This is the strongest muscle of the grp

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10
Q

Medial rectus is innervated by which nerve and blood supply?

A

Opthlamic artery and oclumotor nerve

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11
Q

Medial rectus is needed for?

A

convergence

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12
Q

Medial rectus originates in?

A

Common tendinous ring and optic nerve sheath

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13
Q

Superior rectus primary action?
Secondary action?
Tertiary action?

A

Elevation
Intorision
Adduction

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14
Q

Superior rectus orginates in?

A

CTR and optic nerve sheath

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15
Q

Superior rectus recieves blood supply from?

A

Directly –> ophthalmic artery

Indriectly –> supra-orbital branch

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16
Q

Superior rectus receives innervation from?

A

Oculomotor nerve

17
Q

Inferior rectus primary action?
Secondary action?
Tertiary action?

A

Depression

  • Extorsion
  • Adduction
18
Q

Inferior rectus arise from?

A

CTR

19
Q

Inferior rectus receives blood supply from?

A

Ophthalmic artery

Infra-orbital branch of the maxillary artery

20
Q

Inferior rectus receives innervation from?

A

Oculomotor nerve, –> inferior division

21
Q

Superior oblique primary action?

  • Secondary action?
  • Tertiary action?
A

Intorsion

  • Depression
  • Abduction
22
Q

Superior oblique starts from?

A

Lesser wing of sphenoid bone and CTR

23
Q

Superior oblique receives blood from?

A

Directly –> ophthalmic artery

Indirectly –> infraorbital branch

24
Q

Superior oblique innervation from?

A

Innervated by the trochlear nerve

25
Q

Inferior oblique primary action?

  • Secondary action?
  • Tertiary action?
A

Extorsion

  • Elevation
  • Abduction
26
Q

Inferior oblique starts from?

A

Maxillary bone

27
Q

Inferior oblique receives from blood?

A

Opthalmic artery and infraorbital artery, which is part of maxillary artery

28
Q

Inferior oblique receives nerves from?

A

Oculomotor nerve , inferior part of it

kmk ocular anatomy (9 decks)

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