Neural activity in the frontal pursuit area does not underlie pursuit target selection.
The frontal pursuit area (FPA) contains neurons that are directionally selective for pursuit eye-movements. We found that FPA neurons discriminate target from distracter too late to account for pursuit directional selection. Rather, the timing of neuronal discrimination is linked to pursuit onset, suggesting a role in motor execution. We also found buildup of activity of FPA neurons prior to pursuit onset that correlated with eye acceleration. These results show that the FPA is unlikely to be involved in selection of initial pursuit direction, but could be involved in motor preparation by increasing pursuit gain prior to pursuit onset.
Neurosciences Graduate Program, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0662, United States.
Shaun
S
Mahaffy
Richard J
RJ
Krauzlis
D000200:Action Potentials / Q000502:physiology; D000818:Animals; D004192:Discrimination, Psychological / Q000502:physiology; D005133:Eye Movements / Q000502:physiology; D008253:Macaca mulatta; D009039:Motion Perception / Q000502:physiology*; D009474:Neurons / Q000502:physiology*; D014793:Visual Cortex / Q000502:physiology*