| | |
Summary: IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 41, NO. 11, NOVEMBER 1996 I073
Combinedl Head and Eye Tracking System for
Dynamilc Testing of the Vestibular System
Robert S. Allison,* Moshe Eizenman, and Bob S. K. Cheung
Abstruct- We present a comlbined head-eye tracking system
suitable for use with free head imovement during natural activ-
ities. This system provides an integrated head and eye position
measurement while allowing for a large range of head movement
(approx 1.8 m of head translation is tolerated). Six degrees of
freedom of head motion and two degrees of freedom of eye motion
are measured by the system. The system was designed to be useful
for the evaluation of the vestibulo-ocular reflex (VOR). The VOR
generates compensatory eye movements in order to stabilize gaze
during linear or rotational m o t h of the head. Current clinical
and basic research evaluation ol` the VOR has used a restricted
range of head motion, mainly low-frequency, yaw rotation. An
integrated eye-head tracking system such as the one presented
here allows the VOR response to linear and angular head motion
to be studied in a more physiologically relevant manner. Two
examples of the utility of the integrated head and eye tracking
|
