منابع مشابه
Evolution of nociception in vertebrates: comparative analysis of lower vertebrates.
Nociception is an important sensory system of major fundamental and clinical relevance. The nociceptive system of higher vertebrates is well studied with a wealth of information about nociceptor properties, involvement of the central nervous system and the in vivo responses to a noxious experience are already characterised. However, relatively little is known about nociception in lower vertebra...
متن کاملHematology of Lower Vertebrates
Introduction The proper evaluation of the hemogram of any animal patient involves the determination of a total erythrocyte count [TRBC], packed cell volume [PCV], hemoglobin concentration [Hb], total white blood cell count [TWBC], white blood cell differential, and the evaluation of a stained peripheral blood film. The basic techniques used in mammalian hematology also apply to that of lower ve...
متن کاملHead segmentation in vertebrates
Classic theories of vertebrate head segmentation clearly exemplify the idealistic nature of comparative embryology prior to the 20th century. Comparative embryology aimed at recognizing the basic, primary structure that is shared by all vertebrates, either as an archetype or an ancestral developmental pattern. Modern evolutionary developmental (Evo-Devo) studies are also based on comparison, an...
متن کاملAntitumour Activity of Poochendurappattai in Albino Rats in Albino Rats
The water extract of poochendurappattai was screened for antitumour activity at the doss of 5mg, 10mg, 20mg and 50 mg/kg body weight in rats against methylcholanthrene induced fibrosarcoma. There was 63% regression in the tumour weight at the doses of 10mg and 20 mg/kg body weight. This antitumour activity may be due to compounds like royaleanones since royaleanones are known to possess antican...
متن کاملDuration tuning across vertebrates.
Signal duration is important for identifying sound sources and determining signal meaning. Duration-tuned neurons (DTNs) respond preferentially to a range of stimulus durations and maximally to a best duration (BD). Duration-tuned neurons are found in the auditory midbrain of many vertebrates, although studied most extensively in bats. Studies of DTNs across vertebrates have identified cells wi...
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ژورنال
عنوان ژورنال: Science
سال: 1920
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.52.1336.130