Examples of attractive and repulsive orientation tuning shifts for cells recorded by the same microelectrode tip. (A) Cell displaying a 27°-repulsive shift following adaptation. Downward triangles indicate the adapting orientation. Color code - gray: control, blue: post-adaptation for attractive shifts, red: post-adaptation for repulsive shifts. The original data points are shown in addition to the curve fits. (B) Cell displaying an 8°-attractive shift following adaptation. Both neurons displayed significant orientation tuning shifts (paired t-test, p < 0.01). (C) Both cells presented in A-B were recorded by the same electrode tip and sorted out according to the shape of their action potentials.