Early vision is early in time.
Roelfsema, Tolboom, and Khayat have found that neurons in primary visual cortex, V1, increase their spike firing rates to signal image segmentation and attention. V1 responses were in a temporal sequence: first to image motion, next to segmentation, last to attentional signals. The involvement of V1 with segmentation and attention suggests modifying the hierarchical view of visual perception.
Shapley
Robert
R
Center for Neural Science, New York University, New York, NY 10003, USA. rms3@nyu.edu
D000818:Animals; D004594:Electrophysiology; D000882:Haplorhini; D009474:Neurons / Q000502:physiology; D014785:Vision, Ocular / Q000502:physiology*; D014793:Visual Cortex / Q000254:growth & development* / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*