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Sensory experience and rest control survival of newborn neurons in adults
Date:9/7/2011

t, extended grooming, and sleep. Interestingly, when these behaviors were disrupted, apoptosis was prevented. The researchers also observed that the extent of apoptosis was regulated by prior olfactory sensory experience. Sensory deprivation (occlusion of one nostril) enhanced granule cell apoptosis specifically during the time period after feeding. The authors suggest that sensory experience thus serves to "tag" key synapses and prevent them from being eliminated during subsequent sleep.

"Our results suggest that extensive structural reorganization of the circuitry in the olfactory bulb occurs during the period after feeding and that this reorganization reflects sensory experience from the preceding waking period," concludes Dr. Yamaguchi. "Complex mechanisms of experience-dependent reorganization in the olfactory bulb will likely be revealed in the framework of two sequential behavioral periods, the waking period with olfactory behavior and the rest/sleep period that follows olfactory behavior."


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Contact: Elisabeth (Lisa) Lyons
elyons@cell.com
617-386-2121
Cell Press
Source:Eurekalert

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