Protomap hypothesis
Webb1 maj 2009 · According to this model, known as the protomap hypothesis , neural progenitors in the VZ form a mosaic of proliferative units that establish a primordial species-specific cortical map. The positional information of postmitotic neurons is maintained during their migration to the overlying cerebral cortex by the radial … Webb27 feb. 2024 · The protomap hypothesis suggests that the regional destiny of cortical neurons and the relative size of the cortical area are genetically determined early during embryonic development. The protocortex hypothesis suggests that the regional growth rate is predominantly shaped by external influences.
Protomap hypothesis
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WebbNational Center for Biotechnology Information http://www.rxpgnews.com/research/neurosciences/printer_2836.shtml
Webb18 apr. 2009 · The related ‘handshake hypothesis’ , an elaboration of the protomap hypothesis, proposes that the specified cortical neurons extend a descending process to meet with the specific thalamic input. Indeed, the idea that cortical neurons might have surface molecules that can distinguish between and choose among various thalamic … WebbThe protomap and protocortex theories developed before 1990 claimed, respectively, that the task-specific regions of the cortex are spawned by a zone of "originator" cells; or …
Intimately related to the RUH is the 'protomap' hypothesis, which states that the primordial identity of each functional area of the cerebral cortex is encoded within the cortical stem cells prior to the formation of the cortical layers. Within each developing radial unit, the process of neurogenesis gives rise to post-mitotic (non-dividing) cortical neurons, which begin the process of radial neuronal migration from the ventricular zone and adjacent subventricular zone to form the cortical … Webb1 apr. 2024 · According to the protomap hypothesis formulated by Rakic, neural progenitors in the ventricular zone form a mosaic of proliferative units that establish a primordial species-specific cortical map. Positional information of newborn neurons is maintained during their migration to the overlying cerebral cortex.
The Protomap is a primordial molecular map of the functional areas of the mammalian cerebral cortex during early embryonic development, at a stage when neural stem cells are still the dominant cell type. The protomap is a feature of the ventricular zone, which contains the principal cortical progenitor cells, known as radial glial cells. Through a process called 'cortical patterning', the protomap is patterned by a system of signaling centers in the embryo, which provide positional i…
thermostat heating coolingWebb1 okt. 2007 · This hypothesis postulates that the radial edifice of the cerebral cortex forms by a migration of vertically oriented cohorts of neurons generated at the same site in the … thermostat heater control circuit diagramWebbInvestigating the protomap hypothesis in the primate cerebral cortex; EPH A receptor expression The cerebral cortex, the seat of consciousness and intelligence, is mapped out into functional areas; for instance vision, movement control and language are controlled by distinct areas that are the same across normal individuals. tps realtyWebbEarly thalamus-independent steps in the process of cortical arealization take place on the basis of information intrinsic to the cortical primordium, as proposed by Rakic in his … thermostat heating temperatureWebb16 okt. 2024 · Together, the RUH and protomap hypothesis represent two core principles of early cerebral cortex development. After neurons arrive in the cortical plate, other … tps questions and answers uscisWebbEarly thalamus-independent steps in the process of cortical arealization take place on the basis of information intrinsic to the cortical primordium, as proposed by Rakic in his classical protomap hypothesis [Rakic, P. (1988)Science, 241, 170-176]. These steps depend on a dense network of molecular … thermostat heater for refrigeratorWebbThe protomap hypothesis suggests that the regional destiny of cortical neurons and the relative size of the cortical area are genetically determined early during embryonic development. thermostat heater control