McGoogan J M, Wu W Q, Cassone V M
Department of Biology, Texas A&M University, 77843-3258, College Station, TX, USA.
Vision Res. 2000;40(20):2869-79. doi: 10.1016/s0042-6989(00)00135-8.
Illumination of a chick's eye allows light to pass through to the retina of the contralateral eye. Electroretinographic (ERG) recording employing the scalp or comb as a reference results in shorter implicit time, higher amplitude and lower sensitivity during the day than during the night in a light:dark (LD) cycle and in constant darkness (DD). ERG recordings employing the contralateral eye as reference abolishes rhythmicity or reverses the phase angle (higher amplitudes at night). This is probably due to light transmission through the eyes to elicit visual responses in the reference. The contralateral eye is a poor choice for reference in birds and obscures physiological analyses of clock control of vision.
照亮雏鸡的一只眼睛会使光线穿过并到达对侧眼睛的视网膜。在明暗（LD）周期和持续黑暗（DD）条件下，以头皮或鸡冠作为参考进行视网膜电图（ERG）记录时，与夜间相比，白天的潜伏期更短、振幅更高且敏感性更低。以对侧眼睛作为参考进行ERG记录会消除节律性或使相位角反转（夜间振幅更高）。这可能是由于光线透过眼睛在参考眼中引发了视觉反应。对鸟类而言，对侧眼睛不是理想的参考选择，它会干扰视觉时钟控制的生理分析。
