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Previous studies have revealed that sites in the
cerebral cortex, such as the frontal eye fields and
posterior parietal cortex are critical for the proper
guidance of head and eye movements. We have begun
examining head and eye movements in animals which
contain bilateral cooling loops over the superior
colliculus and multiple cortical loci. Therefore, in
one animal, we are able to assess the contributions of
the individual loci as well as in combination with other
sites. For example, the frontal eye field can be
deactivated unilaterally or bilaterally, combined with
another cortical locus or combined with the ipsilateral
superior colliculus. These single and multiple
deactivations are providing a clearer picture of the
sites involved in head and eye movements and how
different sites work in concert with each other to
produce a single behaviour. |
