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Neurology > Oculomotor disorders > Flashcards

Oculomotor disorders Flashcards

1
Q

Strabismus?

A

Misalignment of the visual axes

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2
Q

Types of strabismus?

A

Paralytic (Non-comitant)

Non-paralytic (Comitant)

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3
Q

Characteristics of Paralytic Strabismus?

A 
Adult
Angle of deviation varies in different fields of gaze
Diplopia
No amblyopia
Muscle weakness identified
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4
Q

Characteristics of comitant strabismus?

A 
Early childhood
Angle of deviation remains constant in different fields of gaze
No diplopia
Amblyopia
No muscle weakness identified
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5
Q

Tropia?

A

Visible deviation always

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6
Q

ESOtropia?

A

Inward (“Crossed Eyes”)

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7
Q

EXOtropia?

A

Outward (“Wall Eyes”)

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8
Q

HYPERtropia?

A

Upward

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9
Q

HYPOtropia?

A

Downward

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10
Q

Phoria?

A

Aligned unless fusion is disrupted

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11
Q

Movements of only one eye?

A

Duction

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12
Q

ADduction?

A

Move in toward nose

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13
Q

ABduction?

A

Move out toward ear

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14
Q

SUPRAduction?

A

Elevation, move up

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15
Q

INFRAduction?

A

Depression, move down

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16
Q

Movement of both eyes?

A

Versions

17
Q

Dextroversion?

A

Right gaze

18
Q

Levoversion?

A

Left gaze

19
Q

Supraversion?

A

Up gaze

20
Q

Infraversion?

A

Down gaze

21
Q

Vergence?

A

Movement of both eyes in opposite directions

22
Q

Convergence?

A

Movement of both eyes toward nose (in)

23
Q

Divergence?

A

Movement of both eyes away from nose (out)

24
Q

Main use of divergence?

A

Not well developed except to return from converged position

25
Q

Intorsion?

A

Rotation of 12 o’clock position of the cornea toward the nose
SO and SR

26
Q

Extorsion?

A

Rotation of 12 o’clock position of the cornea away from the nose
IO and IR

27
Q

Nystagmus?

A

To and from oscillations of eyes

28
Q

Jerk Nystagmus?

A

Slow then fast recovery (neurologic)

29
Q

Pendular nystagmus?

A

Equal amplitude to and fro (poor vision)

30
Q

Diplopia?

A

Sees two images with both eyes open

31
Q

What does diplopia indicate? Causes?

A

Acquired weakness of EOM

Palsy of CN III, IV, VI

32
Q

Greatest deviation in a patient with diplopia is seen when?

A

Direction of action of weak muscle

33
Q

Horizontal diplopia?

A

Weak LR or MR

34
Q

Vertical diplopia?

A

Weak SO, IO, SR, IR

Neurology (25 decks)

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