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Biomedical subjects

L D Lytle

Publications and source records attributed to L D Lytle.

At least 37 records · Page 2Linked to original sources
PubMed1979

Diet, central nervous system, and aging.

A variety of morphological, structural, and chemical changes have been described in the central nervous systems of aging humans and animals. Brain size and volume decline during senescence, and the brain atrophy is accompanied by changes in the number, size, and ultrastructural characteristics of nerve and glial cells. Moreover, recent evidence suggests that the ability of central nervous system cells to communicate with one another via the release of neurotransmitter compounds might be impaired in the elderly. Nutritional factors may play important roles in the aging process of the central nervous system by influencing brain neurotransmission, or by accelerating or retarding geriatric changes in central nervous system structure.

Aged↗
PubMed1978

Striatal nondopaminergic neurons: possible involvement in feeding and drinking behavior.

Intracaudate injections of kainic acid destroy striatal neurons containing acetylcholine and gamma-aminobutyric acid but leave dopaminergic nerve terminals in this brain region intact. Rats injected with the drug are aphagic and adipsic, and have other behavioral abnormalities strikingly similar to those seen in animals with lesions in the dopaminergic nigrostriatal bundle.

Animals↗
PubMed1975

Effects of lateral hypothalamic lesions on consummatory behavior in developing rats.

Bilateral lesions aimed at the lateral hypothalami of preweanling rats result in decreased weight gain and eventual death within 5 days after the operation. Ten-day-old rats with unilateral damage to the lateral hypothalamus show retarded growth, food and water intake regulatory deficits, and altered sensitivity to quinine adulteration of the water for up to 60 days of age. These results suggest that at least one neural mechanism that regulates food and water intake matures early in the postnatal life of the rat.

Age Factors↗
PubMed1975

D-amphetamine disaggregates brain polysomes via a dopaminergic mechanism.

Brain polysomes are disaggregated in rats given moderate to large doses of d-amphetamine sulfate; this response is rapid in onset, lasts for at least 4-6 hr, and varies with the age of the animal. Pretreatment with a dopamine receptor blocking agent, haloperidol or pimozide, blocks the amphetamine-induced disaggregation.

Animals↗
PubMed1975

Analgesic effect of fluoxetine hydrochloride (Lilly 110140), a specific inhibitor of serotonin uptake.

Rats treated with Lilly 110140, a specific inhibitor of serotonin re-uptake in brain, are less sensitive to electroshock. Lilly 110140 antagonizes the hyperalgesia following injections of p-chlorophenylalanine and potentiates morphine analgesia. Naloxone blocks the analgesia following morphine, but has no effect on Lilly 110140-induced analgesia. Brain serotonin neurons may, at least in part, mediate analgesia.

Analgesics↗