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J Neurophysiol (January 28, 2004). doi:10.1152/jn.01117.2003
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Submitted on November 19, 2003
Accepted on January 27, 2004

The effect of a central fixation light on auditory spatial responses in area LIP

Gordon W. Gifford III and Yale E. Cohen*

* To whom correspondence should be addressed. E-mail: yec{at}dartmouth.edu.

A recent study (Grunewald et al. 1999) examined LIP auditory activity while monkeys fixated a central light. A recent report (Grunewald et al. 1999) demonstrated that, while fixating a central light, LIP neurons are not modulated by the location of auditory stimuli until monkeys learn to saccade to the location of an auditory stimulus. This finding suggests that auditory spatial responses in area LIP are dependent on auditory-saccadic training. We found that, in monkeys that had not been trained to make behavioral responses to auditory stimuli, LIP neurons are modulated by auditory-stimulus location when a central light is not present in the environment. These results indicate that LIP auditory responses are not wholly dependent on behavioral training with auditory stimuli.




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