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Biomedical subjects

I Lieblich

Publications and source records attributed to I Lieblich.

At least 37 records · Page 2Linked to original sources
PubMed1980

A genetically mediated relationship between the readiness to self stimulate lateral hypothalamus and the intensity of the septal and ventromedial hypothalamic rage syndromes.

Rats from two genetically high self stimulating lines (LC1-Hi, LC2-Hi) and from two genetically low self stimulating lines (LC1-Lo, LC2-Lo) were subjected to septal lesions at various ages. The genetically high self-stimulators exhibited the typical marked increase in emotionality following septal lesions, while the genetically low self stimulators showed an attentuated emotional response following septal lesions. In a subsequent experiment, animals from the same lines were subjected to VMH lesions. Once again, animals from the genetic high self stimulating lines showed a marked increase in emotionality following the lesions while the animals from the genetic low self-stimulating lines showed an attenuated emotional response. Hyperphagia was observed in all lines with no relation to the self stimulation genetic background. It is suggested that the septal and VMH systems modulating affective behavior are functionally related to the system modulating self stimulation, while these mechanisms seem to be basically independent of the VMH systems involved in maintenance of body weight.

Anger↗
PubMed1980

Level and shape of sequences of motor behavior in inbred and hybrid mice.

Three-hundred seventy-five mice of six inbred strains and their F1 hybrid crosses were observed in a barrier apparatus. Frequencies of jumping over barriers were recorded at each of ten 30-sec intervals. Graphs plotted of mean jumps at each time point show several F1 curves with an apparently adaptive pattern: low frequencies of jumps at start, gradually rising, then leveling off. Nine out of 15 F1 curves also show evidence of heterosis: jumping frequencies of hybrids exceed those of parent strains. Lack of heterosis was peculiar to crosses in which C57BL/6 was one of the parents. A coefficient of convexity C was developed to quantify the shapes of the temporal patterns of proportions of animals engaged in jumping at a given point in the sequence. F1 curves (unlike inbred strains) were found, on the whole, to be negatively convex.

Animals↗