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Biomedical subjects

M L Simner

Publications and source records attributed to M L Simner.

12 recordsLinked to original sources
PubMed1979

Approach and departure patterns generated in the domestic chick by intermittent white light.

Newly hatched domestic chicks were given extended free access to 7 rates of intermittent white light between .5 and 24 flashes per sec. Inspection of the data showed approaches and departures directed toward the light that increased in number and formed an orderly pattern as the rates neared 4 per sec and as the chicks exposed to this rate became older. Also, no differences were found in the amount of time chicks remained next to the various rates during each approach but only in the amount of time they remained away during each departure. The bearing of these results on the proposal that flicker phototaxis might stem from the neural excitation produced through photic driving was discussed along with relating further evidence to recent work in imprinting.

Age Factors↗
PubMed1978

Individual differences during the development of the domestic chick's attraction toward intermittent light.

Stable and persisting differences occur in the domestic chick's attraction toward normally preferred rates of intermittent white light in the vicinity of 4 flashes per second during the period around hatching when this preference develops. These differences are not linked to fluctuations in the test environment, high levels of indiscriminate responding toward flicker in those most attracted, the presence of an alternate rate preference in those least attracted, or to differences among chicks in arousal level or locomotor ability.

Animals↗
PubMed1977

The cardiac self-stimulation hypothesis and the chick's differential attraction toward intermittent sound.

Two experiments were conducted to determine whether the chick's attraction toward specific rates of intermittent sound stems from long-term prehatch exposure by the chick to its own fetal heart beat. Contrary to prediction, Experiment I showed stronger attraction toward an intermittent square wave white noise signal matched for pulse rate, overall pulse duration, and mean intensity, than the sound of the actual fetal heart beat from which this attraction is said to derive, Experiment II demonstrated that long-term prehatch exposure to an intermittent auditory signal having a normally non-preferred rate will not establish an attraction for that same rate after hatching unless it contains a frequency component having latent appetitive properties. Alternatives to the cardiac self-stimulation hypothesis are discussed and, in the context of related evidence, the fetus' general capacity for exposure learning is reconsidered.

Acoustic Stimulation↗