Nature 212, 1504 (24 December 1966); doi:10.1038/2121504a0

Startle Response of Rats after the Production of Lesions at the Junction of the Mesencephalon and the Diencephalon

SVEN G. CARLSSON

Department of Psychology, University of Gothenburg, Sweden.

LESIONS at the junction of the mesencephalon and diencephalon have been found to affect the reactivity of white rats. These rats sometimes showed intense muscular reactions to sensory stimulation although they were usually more placid than other rats. The purpose of my experiment was to conduct a quantitative study of this phenomenon.

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