Vestibulo Ocular Reflex

From Anvita Health Wiki

Contents 1 Indications 2 Clinical-significance 3 Procedure 4 More General Terms 5 References

Indications

• balance disorder
• assessment of accidental falls
• falls in the elderly

Clinical-significance

• test of neural mechanism that keeps a visual image registered on the fovea during head movement
• evaluates the 3 components of the vestibulo- ocular reflex

• labyrinth
• vestibular nuclei in the brain stem
• higher central vestibular connections

Procedure

• the patient shakes his/her head 'no' & 'yes' while wearing electrodes that monitor eye position & a small angular velocity sensor that measures head velocity
• 3 characteristics of the vestibulo- ocular reflex are computed

• gain (ratio of eye velocity to head velocity)
• phase (degrees by which the eye misses the target)
• asymmetry (comparing gain moving right with gain moving left)

More General Terms

• clinical procedure
• reflex

References

1. Balance+Plus System [1]

vestibulo-ocular reflex; sinusoidal vertical axis rotational testing