The evolution of nervous system centralization
نویسندگان
چکیده
منابع مشابه
The evolution of nervous system centralization.
It is yet unknown when and in what form the central nervous system in Bilateria first came into place and how it further evolved in the different bilaterian phyla. To find out, a series of recent molecular studies have compared neurodevelopment in slow-evolving deuterostome and protostome invertebrates, such as the enteropneust hemichordate Saccoglossus and the polychaete annelid Platynereis. T...
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The origin of the chordate central nervous system (CNS) is unknown. One theory is that a CNS was present in the first bilaterian and that it gave rise to both the ventral cord of protostomes and the dorsal cord of deuterostomes. Another theory proposes that the chordate CNS arose by a dramatic process of dorsalization and internalization from a diffuse nerve net coextensive with the skin of the...
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Centralized nervous systems (NSs) and complex brains are among the most important innovations in the history of life on our planet. In this context, two related questions have been formulated: How did complex NSs arise in evolution, and how many times did this occur? As a step towards finding an answer, we describe the NS of several representatives of the Xenacoelomorpha, a clade whose members ...
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15 صفحه اولQuick Assessment of the Nervous System
آیا شما از جمله افرادی هستید که به دلیل عدم اطمینان از بررسی صحیح سیستم عصبی، از بیماران اعصاب دوری می کنید؟ در واقع اعصاب یکی از ساده ترین سیستم های بدن ما است. متاسفانه در اکثر موارد مشکلات ناشی از آموزش بررسی سیستم عصبی، باعث ترس از آن می شود. اگر باور داشته باشید که در شیفت شب یک بخش، قادر به تشخیص افزایش فشار داخل جمجمه در بیمار کهنسال مبتلا به سکته مغزی هستید و نتایج بررسی شما به معنای حف...
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ژورنال
عنوان ژورنال: Philosophical Transactions of the Royal Society B: Biological Sciences
سال: 2008
ISSN: 0962-8436,1471-2970
DOI: 10.1098/rstb.2007.2242