CONTRAST SENSITIVITY OF CAT
CONTRAST SENSITIVITY OF CAT
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DOI：
10.1113/jphysiol.1973.sp010163
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发表时间：
1973-01-01
影响因子：
5.5
通讯作者：
PICCOLINO, M
中科院分区：
文献类型：
--
作者：
CAMPBELL, FW;MAFFEI, L;PICCOLINO, M
1、实验是在三叉神经前的猫身上进行的。 2.通过记录光栅刺激从视觉皮层引起的电位，确定产生的电压与光栅对比度的对数之间存在线性关系。 3. 光栅引起的电压与光栅的方向无关。 4. 先前已在人类中证明，如果通过外推至零电压发生点来确定对比度，则该值对应于心理物理学阈值。假设猫的阈值也出现在零电压下，确定了许多空间频率和方向的阈值。 5. 当将猫的阈值灵敏度函数与人进行比较时，发现猫的阈值灵敏度函数向较低的空间频率移动了大约十倍。这意味着虽然猫无法像人类一样看到如此高的空间频率，但它可以比人类更好地看到较低的频率。图片
1. The experiments were carried out on pretrigeminal cats. 2. By recording potentials evoked from the visual cortex by a grating stimulus, it was established that there was a linear relation between the voltage generated and the logarithm of the contrast of the grating. 3. The voltage evoked by the grating was independent of the orientation of the grating. 4. It has previously been shown in man that, if the contrast is determined by an extrapolation to the point at which a zero voltage occurs, this value corresponds to the psychophysical threshold. On the assumption that the threshold of the cat also occurs at zero voltage, thresholds for a number of spatial frequencies and orientations were determined. 5. When the threshold sensitivity function for the cat is compared with man it is found to be displaced to lower spatial frequencies by a factor of about ten. This means that while the cat cannot see such high spatial frequencies as man, it can see lower frequencies better than man. Images