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Chemical Senses 12: 365-379,
© 1987

research-article

Spatially selective alteration of the mitral cell layer: a critical review of the literature

David S. Reasner

Department of Psychology, Uris Hall, Cornell University Ithaca, NY J4853, USA

Evidence that chronic odor exposure alters mitral cell morphology in young rats is reviewed. The functional origin of the mitral cell alteration is discussed in conjunction with the development of the olfactory bulb. It is concluded that odor exposure in young rats can alter the mitral cell layer in spatially selective zones. Mitral cell alteration (primarily measured as penkaryal diminution) appears to be a consequence of reduced stimulation and may be related to other activity-dependent ontogenetic effects. Chronic odor exposure provides an approach by which both spatial coding of odor quality and functional development in the mammalian olfactory bulb can be examined.


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