Developmental changes in tonic immobilit
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Dr. Carolyn Kent Rovee; Joel M. Kleinman
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Article
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1974
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John Wiley and Sons
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English
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## Abstract Tonic immobility (TI) was induced by means of ventral restraint in White Leghorn chicks within 12โhr posthatch (Day 0) and, in independent groups, on succeeding days through Day 10. Durations of immobility and eye closure increased and incidence of immobility termination and vocalizatio