0000000000023384
AUTHOR
Ernandes M
Short term diet of precooked corn meal almost lacking in tryptophan and interspecific rat-mouse aggressive behaviour.
The content of tryptophan in a precooked corn meal and in 4 types of selected corn seeds: Zea mays indurata, identata, opaque/2 and Marano synth., has been determined by three different methods: ion-exchange chromatography, spectrofluorometry and spectrophotometry. This content is very low, less than 0.080% d.w. Alimentation for 4 d with a diet composed of precooked corn meal with a tryptophan content less than 0.025% induced the appearance of aggressive-cidal or aggressive non-cidal behaviour towards the mouse in more than half of Wistar rats bred in a room constantly lighted by a sodium steam light. The appearance of this behaviour is probably connected with a decrease in brain serotonin.
Environmental lighting and muricidal behaviour in the male Wistar rat.
Effects of different conditions of environmental lighting on the appearance of the muricidal behaviour in male Wistar rats have been studied. The animals were kept under different conditions of environmental lighting: 1) natural day light alternated with the dark of the night; 2) sodium, continuous light emitted by a sodium steam lamp; 3) neon, continuous light emitted by fluorescent neon tubes. The continuous sodium steam light increased the percentage of animals becoming muricide when compared to animals bred in a natural environment with a normal succession of day-night lighting. On the contrary, this percentage decreased if the rats of the same group are exposed to continuous light emit…
Theism as a Product of the Human Triune Brain
Religion implies thoughts and behaviors. According to Evolutionary (Darwinian) Psychology, all human behaviors or thoughts are products of neural (or neuroendocrine) functions in conjunction with inputs that trigger these functions: No function, no behavior or thought; no input, no behavior or thought. In this book, the Author searches for the origin of theism (considered a basic feature of religion) in early humans, using data from various sciences, such as neurobiology, ethology,physical anthropology, and cognitive psychology.