Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Abstract Following the orienting saccade of a combined eye-head gaze shift, normal monkeys exhibit a compen-
 

Summary: Abstract Following the orienting saccade of a combined
eye-head gaze shift, normal monkeys exhibit a compen-
satory eye counterrotation that stabilizes gaze as the
head movement continues. This counterrotation, which
has a gain (eye velocity/head velocity) of near unity, is a
manifestation of the vestibulo-ocular reflex (VOR).
Acute unilateral labyrinthectomy (UL) causes severe
asymmetry in the VOR during passive head rotations
that recovers incompletely over time. The purpose of this
investigation was to compare the recovery of the coun-
terrotation gain during horizontal gaze shifts with that of
the passive VOR after UL. During the 1st week after UL,
counterrotation gains were asymmetric, being lower for
head movements towards the lesion but nearly normal
for head movements towards the intact side. Whereas
this asymmetry in the counterrotation gain resolved
within a week after UL, asymmetries in the passive VOR
persisted. During the 1st week after UL, behavioral per-
formance was generally poor, with a high incidence of
inaccurate gaze shifts and larger latencies. In addition,

  

Source: Angelaki, Dora - Department of Anatomy and Neurobiology, Washington University in St. Louis
Dickman, J. David - Department of Anatomy and Neurobiology, Washington University in St. Louis

 

Collections: Biology and Medicine