在上图中,两个不同宽度且颜色均匀(灰色)的矩形被设置在背景上,从顶部到底部具有从暗到亮的梯度。两个矩形在顶部看起来较浅而在底部看起来较暗。由于横向抑制,来自每个矩形顶部的光(相对于较暗的背景)在大脑中产生比来自矩形下部的相同光(相对于较亮背景)更强的神经元响应。横向抑制也发生在触觉或体感感知中。通过激活皮肤中的神经受体来感知触觉。皮肤有多个感受到施加压力的感受器。侧向抑制增强了更强和更弱的触摸信号之间的对比度。较强的信号(在接触点处)比较弱的信号(接触点的外围)更大程度地抑制相邻的信号。此活动允许大脑确定准确的接触点。具有较大接触敏锐度的身体区域,例如指尖和舌头,具有较小的感受野和较高的感觉受体集中。

澳大利亚墨尔本大学Essay代写:横向抑制

In the above image, two rectangles of different widths and uniform colors (gray) are placed on the background with a gradient from dark to light from top to bottom. The two rectangles look lighter at the top and darker at the bottom. Due to lateral suppression, light from the top of each rectangle (relative to the darker background) produces a stronger neuronal response in the brain than the same light from the lower part of the rectangle (relative to the brighter background). Lateral inhibition also occurs in tactile or somatosensory perception. The sense of touch is sensed by activating neural receptors in the skin. There are multiple receptors on the skin that feel pressure. Lateral suppression enhances the contrast between stronger and weaker touch signals. A stronger signal (at the point of contact) has a weaker signal (the periphery of the contact point) that suppresses adjacent signals to a greater extent. This activity allows the brain to determine the exact point of contact. Body regions with greater contact acuity, such as fingertips and tongues, have a smaller receptive field and a higher concentration of sensory receptors.

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