Here we describe a method to fix gaze positions and to significantly reduce
saccadic oscillations in pigeons. The procedure consists of a mechanical i
mmobilization of the eye through the use of an electromagnet that exerts a
radial force upon a small metal rectangle glued to the dorsal part of the e
ye. The method can be used in avian visual neurophysiology in order to hold
the eye immobilized for periods of time, long enough to map the properties
of visual receptive fields and investigate the possible functions of sacca
dic oscillations. (C) 1999 Elsevier Science B.V. All rights reserved.