Behavioural changes in hamsters with otoconial malformations.

Histopathologic Basic of the Teratogenic Effects of H-1 Virus on Hamster Embryos.

R A T virus (RV), an extremely small DNA virus with a diameter of 15 m/x (Dalton, Kilham & Zeigel, 1963), has exhibited a marked ability to proliferate in placental and fetal tissues following intravenous inoculations of pregnant hamsters, the maternal health remaining unaffected. Effects on the fetus, however, have varied with the strains of RV employed. In initial experiments, a strain which ...

[Changes in the utricular otoconia of the chick embryo developed under 2G-gravity].

Whether or not vestibular adaptation occurs upon exposure to altered gravity is an important human problem. Studies have been performed to ascertain whether morphological changes in vestibular organs occur in animal models upon exposure to microgravity. On the other hand, the morphological changes which occur in vestibular organs under hypergravity have not yet been fully elucidated and morphol...

Pathogenesis of vaccine strains of measles virus in suckling hamsters

CLASSIFICATION OF CONGENITAL MIDDLE AND EXTERNAL EAR MALFORMATIONS: CT STUDY

The authors used high-resolution computed tomography (HRCT) for studying 52 congenitally malformed ears in 45 children between five and 10 years of age. In six children the malformations were bilateral. The malformations clinically manifested as microtia, atresia of the external auditory canal and conductive deafness. Analyzing anatomical details and pathological changes on HRCT axial sec...

Lasting changes in neuronal activation patterns in select forebrain regions of aggressive, adolescent anabolic/androgenic steroid-treated hamsters.

Repeated exposure to anabolic/androgenic steroids (AAS) during adolescence stimulates high levels of offensive aggression in Syrian hamsters. The current study investigated whether adolescent AAS exposure activated neurons in areas of hamster forebrain implicated in aggressive behavior by examining the expression of FOS, i.e., the protein product of the immediate early gene c-fos shown to be a ...