Abstract：
:In optical imaging experiments, it is often advantageous to map the field of view and to converge the eyes without electrophysiological recording. This occurs when limited space precludes placement of an electrode or in chronic optical chambers in which one may not want to introduce an electrode each session or for determining eye position in studies of ocular disparity response in visual cortex of anesthetized animals. For these purposes, we have developed a spot imaging method that can be conducted rapidly and repeatedly throughout an experiment. Using small 0.2 degrees -0.5 degrees spots, the extent of the imaged field of view is mapped by imaging cortical response to single spots, placed at different positions (0.2 degrees steps) in either the horizontal or vertical axes. By shifting the relative positions of two spots, one presented to each eye, eye convergence can be assessed to within 0.1 degrees resolution. Once appropriate eye alignment is determined, stimuli for further optical imaging procedures (e.g. imaging random dot stimuli for study of disparity responses) can then be confidently placed. This procedure can be quickly repeated throughout the experiment to ensure maintained eye alignment.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Lu HD,Chen G,Ts'o DY,Roe AWdoi
10.1016/j.neuroimage.2008.10.007subject
Has Abstractpub_date
2009-02-01 00:00:00pages
636-46issue
3eissn
1053-8119issn
1095-9572pii
S1053-8119(08)01099-9journal_volume
44pub_type
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