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• W1981260809 abstract "Behavioral evidence indicates that altricial mammals possess olfactory function at early developmental ages, before the olfactory bulb has matured anatomically. We monitored the early anatomic and functional development of the olfactory bulb in rat pups stimulated with odors using in situ localization of c-fos mRNA to identify responsive postsynaptic neurons. Odor-specific spatial patterns of neuronal activation in the glomerular layer were evident from birth, were sharply defined rather than diffuse, and remained relatively unchanged in terms of their bulbar distribution during the first 3 postnatal weeks. In neonates, focal postsynaptic responses in the glomerular layer occurred in the form of clusters of activated tufted neurons. Broad zones of activated mitral cells were located beneath these cell clusters, with scattered neurons in the underlying granule cell layer also expressing c-fos. The cellular composition of these functional neuronal groups shifted from predominantly output neurons at the earliest ages, to increasing incorporation of interneurons as they developed postnatally. The characteristic distribution of activated neurons in the mature glomerular layer, in which the boundaries of individual glomeruli are precisely defined by cells expressing c-fos, emerged near the end of the first week. Broad zones of cRNA hybridization in the mitral cell layer became increasingly restricted as the size of the activated granule cell population increased postnatally, correlating with the functional maturation of inhibitory circuitry. These results provide evidence that the types and distributions of neurons collectively activated by sensory input to glomeruli change as the rat olfactory bulb matures and that distinct, functional odor maps in the glomerular layer are established from birth." @default.
• W1981260809 created "2016-06-24" @default.
• W1981260809 creator A5004377423 @default.
• W1981260809 creator A5069998832 @default.
• W1981260809 date "2002-11-26" @default.
• W1981260809 modified "2023-09-25" @default.
• W1981260809 title "Anatomic mapping of neuronal odor responses in the developing rat olfactory bulb" @default.
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• W1981260809 doi "https://doi.org/10.1002/cne.10452" @default.
• W1981260809 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12454996" @default.
• W1981260809 hasPublicationYear "2002" @default.
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