Newborn monkeys reared in darkness for 16 months, except for daily 1-hour periods of exposure to unpatterned light, were allowed to press a lever to obtain unpatterned light. The animals showed apparently insatiable responding, at rates that were extremely high as compared with rates for normally reared control animals.

Animals↗

PubMed1962

Inhibition and facilitation of afferent information by the caudate nucleus.

Stimulation of the caudate nucleus modifies inputs to the visual system of the cat. The modification of such sensory information is similar to the modification seen on stimulation of the thalamus and brain stem reticular formation. Preliminary stimulation of the caudate nucleus at different intervals prior to the afferent input may have facilitatory or inhibitory effects on both evoked potentials and unitary responses of the visual cortex.

Animals↗

PubMed1962

Self-maintained sensory input and sensory deprivation in monkeys: a behavioral and neuropharmacological study.

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Animals↗