BV 8 - nystagmus

Card Set Information

Author:
sookylala
ID:
290423
Filename:
BV 8 - nystagmus
Updated:
2014-12-02 09:12:52
Tags:
nystagmus
Folders:

Description:
nystagmus
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user sookylala on FreezingBlue Flashcards. What would you like to do?


  1. INS features?
    • slow+fast phases or pendular
    • hoz with small torsional
    • increased intensity with fixation
    • decreased intensity with inattention/sleep
    • variable intensity in DFOG
    • AHP
    • strab
    • head oscillations
  2. INS tx?
    • full rx and if ortho - 7BO yoked prism
    • if strab present - then prism to correct- usually if sensory fusion improves, nystagmus will decrease
  3. Recording nystagmus?
    • direction of fast phase
    • movement intensity
    • conjugation
    • gaze and convergence effects
    • monocular
    • dx vs near
  4. Clinical assessment of nystagmus?
    • always take bino VA
    • full cyclo in kids
    • ret - ignore oscillation, do in null position, older kids
    • binocular rx - can fog oscillating eye
  5. treatment for congenital nystagmus
    give full rx - will improve visual acuity and function
  6. Common sx of nystagmus?
    • decreased VA
    • oscillopsia
    • AHP
  7. What is the difference between pendular and jerk nystagmus?
    • pendular: no change in velocity in diff directions
    • jerk: fast and slow phases have unequal velocity
  8. Acquired vs congenital jerk velocities of slow phases?
    • acquired: linear or decreasing velocity
    • congenital: increasing velocity
  9. Physiological nystagmus?
    • nystagmus present only in eccentric, hoz gazes
    • amp is small
    • very fast velocity
    • nystag extinguishes with time
    • resolves when eye is moved to less eccentric position
  10. Gaze evoked nystagmus?
    • Cause: medication
    • Not central
    • beats in direction of eccentric gaze
  11. Nystagmus due to VL?
    • Cause: fixation disruption
    • Jerk: retinal
    • Pendular: ON
    • Tx: underlying cause
  12. APN?
    • Cause: MS/CNS demyelination
    • Tx: gabapentin
  13. Nystagmus due to vestibular imbalance?
    • Follows Alex's Law: nystagmus increases in direction of fast phases
    • Tx: Meds
    • Acute: Spontaneous recovery
  14. Periodic alternating nystagmus?
    • Cause: lesion
    • hoz jerk nystagmus spontaneously recerses direction every 60-90s
    • DDX: peripheral vestibular ynstagmus
  15. Spasmus nutans?
    • cause: due to intracranial neoplasm
    • head nodding + nystagmus
    • refer children for neuro + head scan

What would you like to do?

Home > Flashcards > Print Preview