Cholinergic blockade and tonic immobility in chickens

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Cholinergic blockade and tonic immobility in chickens

To investigate the effects of cholinergic blockade on duration of tonic immobility (TI) and habituation to handling and the TI testing procedure, two groups of cockerel chicks were tested following injection with scopolamine or saline. One week later half of each group was given a second test for TI following injection with saline or scopolamine. Results indicated that scopolamine significantly...

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Traumatic events and tonic immobility.

Tonic immobility is a basic defense strategy which has not been studied in depth in humans. Data suggest that it may be a relatively frequent phenomenon in victims of rape and sexual abuse, but its occurrence has not been systematically explored in other types of trauma. We carried out a retrospective study in a sample of 100 university students to establish whether tonic immobility varies depe...

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Cholinergic modulation of tonic immobility and nociception in the NRM of guinea pig.

Tonic immobility (TI) is an inborn defensive behavior characterized by a temporary state of profound and reversible motor inhibition elicited by some forms of physical restraint. It is known that endogenous antinociceptive systems are activated during the emission of defensive behaviors including TI. The nucleus raphe magnus (NRM) is related to the modulation of nociceptive and behavioral respo...

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Predictors of tonic immobility during traumatic events

Título: Predictores de la inmovilidad tónica ante eventos traumáticos. Resumen: La inmovilidad tónica (IT) es una posible reacción ante el peligro que es facilitada por el miedo intenso, la restricción física y la incapacidad percibida de escapar. Otras variables que podrían influir, tales como el tipo de eventos traumáticos, características de los mismos y características personales han sido p...

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Many arthropods, including terrestrial isopods, are capable of entering a state of tonic immobility upon a mechanical disturbance. Here we compare the responses to mechanical stimulation in three terrestrial isopods Balloniscus glaber, Balloniscus sellowii and Porcellio dilatatus. We applied three stimuli in a random order and recorded whether each individual was responsive (i.e. showed tonic i...

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ژورنال

عنوان ژورنال: Bulletin of the Psychonomic Society

سال: 1977

ISSN: 0090-5054

DOI: 10.3758/bf03337018