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Fear-potentiated startle responses (FPS) to the visual (A), olfactory (B), and contextual (C) CSs, and freezing responses to the context (D) in sham-operated and visual thalamus-lesioned animals. Combined lesions of the LG and LP specifically blocked expression of fear-potentiated startle to the visual CS but had no effect on fear-potentiated startle to the odor CS, as well as startle or freezing to the context.
