The spectral responsiveness and the temporal frequency response (TFR) of cat optic tract and lateral geniculate neurons: Sinusoidal stimulation studies
1977; Elsevier BV; Volume: 17; Issue: 2 Linguagem: Inglês
10.1016/0042-6989(77)90092-x
ISSN1878-5646
Autores Tópico(s)Color perception and design
ResumoThe Spectral Responsiveness and the Temporal Frequency Response (TFR) of cat optic tract and lateral geniculate neurons have been determined using sinusoidal stimulation. Based on their Critical Flicker Frequency (CFF) to a white test spot of dia 2.5° and luminance 105 apostilbs, the the neurons may be classified into two groups, one having a CFF of about 25 Hz, the other 35 Hz. The results indicate that whereas the 25 Hz units receive inputs from the rod system, the 35 Hz units receive inputs from red, green and blue cone systems. The “on” and the “off” responses of lateral geniculate opponent neurons indicate that they may be described by a system of dichromatic coefficients. The poor performance of cats in behavioural experiments on colour discrimination is attributed to inadequate development of opponent colour mechanisms.
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