Abstract
The effects of sound stimulation (electric bell, 110 dB) on the pineal glands of adult female rats were studied. Two types of animals were selected: audiogenic (Adg) and nonaudiogenic (Nadg). Unlike the Nadg rats, Adg rats exhibited tonic-clonic seizures in response to stimulation. In Adg rats, after a single seizure, all pinealocyte nuclei were pyknotic and the characteristic lobular organization of the pineal was markedly disrupted, indicating intense glandular stress; however, neither serotonin levels nor its biosynthesis were significantly altered. These results suggest a physiopathological relationship between audiogenic seizures and the pineal gland.
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