Die Biologie der sog. „tierischen Hypnose“.

Animal hypnosis: a study in the induction of tonic immobility in chickens.

“…Darwin (3) and Bramwell (2) on the other hand, spoke of death feigning. Still others have interpreted the phenomenon in terms of hypnosis (10), spatial disorientation (6) and paralysis of fear (9).…”

Animal hypnosis.

“…Steiniger (40), in accordance with his concept of unimpaired sensation during immobilization, believes that pain is felt by the immobilized animal but is not overtly manifested because of its inability to move.…”

“…By 1938, Stroder (43) had written that over 100 works were concerned with the designation of the phenomenon. Steiniger (40), in one of the more recent papers on this problem, cites 14 such terms and attempts to distinguish between their possible meanings.…”

“…Reisinger (33), working with crayfish, claimed that light or darkness, and electricity were inconsequential in their effects on immobilized subjects. Bramwell (4), Verworn (49), and Steiniger (40) believe that sensation of the stimulus in an immobilized state is not diminished, even though reactivity is inhibited. 1 Depth of trance.…”

“…Verworn, describing the tonic contraction occurring in the state, says: "Dieser charakterische Symptomen-Complex tritt auch noch ein, wenn man den Thieren das Grosshirn herausgenommen hat" (49, p. 154). The possible effect of' taming had received no attention until the work of Steiniger (40). He found that birds confined to cages in a laboratory were less suceptible than birds allowed to roam freely.…”