Figure 2.

Barbiturate increases the amplitude of the contralateral deprived pathway in adults, but has no effect in juveniles. (A) Barbiturate (pentobarbital) alters the electroencephalogram pattern recorded from the visual cortex. Traces were obtained before and after intraperitoneal injection of pentobarbital, without changing the location of the recording electrode. (B) VEP amplitudes in mice right-eye-deprived for 4 d, before and after barbiturate. Amplitudes were unchanged for juveniles, but were frequently increased in adults, especially in the deprived pathways. (C) Group-normalized contrast-response curves from the left cortex of right-eye deprived mice. The curves represent averages of all cases (n = five animals for juveniles and adults). Barbiturate increased the difference between right- and left-eye responses in adult, but had no effect in juveniles. Error bars, SEM.