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Biomedical subjects

J M Weiss

Publications and source records attributed to J M Weiss.

At least 145 records · Page 8Linked to original sources

Telemetered recording of hormone effects on hippocampal neurons.

Frequency-modulated telemetry was used to record the effects of hormones on single-unit activity in the brains of freely moving rats. Corticosterone decreased unit activity in the dorsal hippocampus. Adrenocorticotrophic hormone had the opposite effect.

Adrenocorticotropic Hormone↗

Pituitary-adrenal influences on fear responding.

In a passive avoidance situation, hypophysectomized male rats show less fear than normal rats, whereas adrenalectomized rats show greater fear than normals. These results probably occur because hypophysectomized rats lack adrenocorticotrophic hormone, which increases arousal or emotionality, whereas adrenalectomized animals lack certain adrenal steroids, which inhibit excitatory effects. The results indicate that adrenocorticotrophic hormone and certain adrenal steroids have opposite effects in regulating fear-motivated behavior.

Adrenal Cortex Hormones↗