منابع مشابه
Auditory Cortex Basal Activity Modulates Cochlear Responses in Chinchillas
BACKGROUND The auditory efferent system has unique neuroanatomical pathways that connect the cerebral cortex with sensory receptor cells. Pyramidal neurons located in layers V and VI of the primary auditory cortex constitute descending projections to the thalamus, inferior colliculus, and even directly to the superior olivary complex and to the cochlear nucleus. Efferent pathways are connected ...
متن کاملSelective attention to visual stimuli reduces cochlear sensitivity in chinchillas.
It is generally accepted that during periods of attention to specific stimuli there are changes in the neural activity of central auditory structures; however, it is controversial whether attention can modulate auditory responses at the cochlear level. Several studies performed in animals as well as in humans have attempted to find a modulation of cochlear responses during visual attention with...
متن کاملBacterial intestinal flora associated with enterotoxaemia in Belgian Blue calves.
The enterotoxaemia syndrome in Belgian Blue calves is characterised by a high case fatality rate, sudden death, lesions of haemorrhagic enteritis of the small intestine and, quite often an absence of other clinical signs but its cause has not been yet identified. As a first step in this identification, the aerobic and anaerobic intestinal flora of a population of 78 calves, originating from far...
متن کاملDevelopment of a Prophylactic Method against Rabbit Enterotoxaemia
The antimicrobial effect of tannic acid and raw material of Acacia nilotica fruits and leaves (tannin-rich plant) on Clostridium perfringens were comparatively evaluated. Different concentrations) 10 mg to 10 μg/ml)of tannic acid; fruits, and leaves were tested on Cl. perfringens. The obtained results revealed that the minimum inhibitory concentrations were 156, 75 and 100 μg/ml for tannic acid...
متن کاملSensitivity of distortion product otoacoustic emissions in noise-exposed chinchillas.
The present study investigates the effect of small amounts of outer hair cell (OHC) loss on distortion product otoacoustic emission (DPOAE) levels and evoked potential permanent threshold shifts (PTS) in a population of 12 noise-exposed chinchillas. The group mean DPOAE level, which decreased by up to approximately 15 dB in the presence of less than 8 dB PTS and 15% OHC loss, indicates that DPO...
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ژورنال
عنوان ژورنال: Laboratory Animals
سال: 1975
ISSN: 0023-6772,1758-1117
DOI: 10.1258/002367775780994745