2 . ELECTROPHYSIOLOGY OF THE RETINA
51
-L*bLLLLt 0 I + I S EC
- -U-iLLU
Fig. 12. Sample records from units in the inner nuclear layer (carp), ( a ) on
type, ( b ) off type, and ( c ) on-off type. From Kaneko and Hashimoto ( 1969).
Localization of these cells in the inner nuclear layer has been established by means of the electrode marking, but the identification of cell
types is left to future studies [but see the latest work of Werblin and
Dowling ( 1969) and Kaneko ( 1970) 1,
VI. RETINAL MECHANISMS OF COLOR VISION
The above description of electrical events at each retinal level involved
observations related to the color coding. Accordingly, the main task now
will be to collect these scattered data along with some others not yet
referred to and to arrange them for a brief summary of the present status
of understanding of color vision. The behavioral aspects of color vision
will be discussed in Chapter 3, by Ingle.
Over a century and a half ago, Young (1802) theorized in man that
the color discrimination is mediated by three photoreceptor substances,
each maximally sensitive to a different region of the spectrum. Two recent
studies on single cones of Cyprinidae, one microspectrophotometric
( Marks, 1965) and the other electrophysiological ( Tomita et al., 1 9 6 7 ) ,
have shown that Young's trichromatic theory also applies to the fish, although it remains to be studied how far the findings in Cyprinidae can
51
-L*bLLLLt 0 I + I S EC
- -U-iLLU
Fig. 12. Sample records from units in the inner nuclear layer (carp), ( a ) on
type, ( b ) off type, and ( c ) on-off type. From Kaneko and Hashimoto ( 1969).
Localization of these cells in the inner nuclear layer has been established by means of the electrode marking, but the identification of cell
types is left to future studies [but see the latest work of Werblin and
Dowling ( 1969) and Kaneko ( 1970) 1,
VI. RETINAL MECHANISMS OF COLOR VISION
The above description of electrical events at each retinal level involved
observations related to the color coding. Accordingly, the main task now
will be to collect these scattered data along with some others not yet
referred to and to arrange them for a brief summary of the present status
of understanding of color vision. The behavioral aspects of color vision
will be discussed in Chapter 3, by Ingle.
Over a century and a half ago, Young (1802) theorized in man that
the color discrimination is mediated by three photoreceptor substances,
each maximally sensitive to a different region of the spectrum. Two recent
studies on single cones of Cyprinidae, one microspectrophotometric
( Marks, 1965) and the other electrophysiological ( Tomita et al., 1 9 6 7 ) ,
have shown that Young's trichromatic theory also applies to the fish, although it remains to be studied how far the findings in Cyprinidae can