Time (s)

Рис. 1.15. Передача информации потенциалами действия. (А) Ответ клетки зрительной коры кош­ки на предъявление вертикальной полоски света. (В-Е) Ответы на стимулы другой ориентации.

Fig. 1.15. Information Conveyed by Action Poten­tials. Extracellular recordings from a neuron in the cerebral cortex of a lightly anesthetized cat. Action potentials in this cell indicate that a bar of light that is almost vertical shines on one particular part of the visual field. The small drawings to the left of the graphs show how visual stimuli such as bars or edges with different orientations and positions are presented to the eye. (A) The cortical cell fires a burst of action potentials when the light stimulus consists of a vertical bar of light in one particular part of the visual field. (B-E) Bars with different orientations or diffuse light fail to evoke action potentials. The cortical cell integrates information arriving by way of relays from a large number of photoreceptors, some of which (corresponding to those illuminated by the vertical bar) give rise to excitation on the cortical cell, the others giving rise to inhibition. (After Hubel and Wiesel 1959.)