The influence of ovarian hormones on the recovery period following lateral hypothalamic lesions.

Following bilateral lesions of the lateral hypothalamus animals are rendered completely aphagic and adipsic (Anand and Brobeck, 1951; Teitelbaum and Stellar, 1954). If not maintained by intragastric feeding, rats will eventually die of starvation and dehydration. However, if the animals are kept alive a gradual recovery of food and water intake will occur. This recovery period has been extensively and carefully studied, and four distinct recovery stages have been identified (Teitelbaum, 1961; Teitelbaum and Epstein, 1962). The first stage of recovery is characterized by the animal\u27s refusal of all food and water. In the second stage wet and palatable foods are accepted, although not in sufficient quantities to maintain life. During the third phase, the animal is able to regulate its caloric intake on wet and palatable foods, but is unable to regulate its weight on dry food. Finally, in the fourth stage the lateral hypothalamic lesioned animal will accept dry food and water in sufficient amounts to maintain life

Distributional Borel Summability of Odd Anharmonic Oscillators

It is proved that the divergent Rayleigh-Schrodinger perturbation expansions for the eigenvalues of any odd anharmonic oscillator are Borel summable in the distributional sense to the resonances naturally associated with the system