Publikation: Sensory Memory for Odors Is Encoded in Spontaneous Correlated Activity Between Olfactory Glomeruli
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Neural Computation. 2006, 18(1), pp. 10-25. ISSN 0899-7667. eISSN 1530-888X. Available under: doi: 10.1162/089976606774841558
Zusammenfassung
Sensory memory is a short-lived persistence of a sensory stimulus in the nervous system, such as iconic memory in the visual system. However, little is known about the mechanisms underlying olfactory sensory memory. We have therefore analyzed the effect of odor stimuli on the first odor-processing network in the honeybee brain, the antennal lobe, which corresponds to the vertebrate olfactory bulb. We stained output neurons with a calcium-sensitive dye and measured across-glomerular patterns of spontaneous activity before and after a stimulus. Such a single-odor presentation changed the relative timing of spontaneous activity across glomeruli in accordance with Hebb's theory of learning. Moreover, during the first few minutes after odor presentation, correlations between the spontaneous activity fluctuations suffice to reconstruct the stimulus. As spontaneous activity is ubiquitous in the brain, modifiable fluctuations could provide an ideal substrate for Hebbian reverberations and sensory memory in other neural systems
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570 Biowissenschaften, Biologie
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GALÁN, Roberto Fernandez, Andreas V. M. HERZ, Randolf MENZEL, Marcel WEIDERT, C. Giovanni GALIZIA, 2006. Sensory Memory for Odors Is Encoded in Spontaneous Correlated Activity Between Olfactory Glomeruli. In: Neural Computation. 2006, 18(1), pp. 10-25. ISSN 0899-7667. eISSN 1530-888X. Available under: doi: 10.1162/089976606774841558BibTex
@article{Galan2006Senso-7627,
year={2006},
doi={10.1162/089976606774841558},
title={Sensory Memory for Odors Is Encoded in Spontaneous Correlated Activity Between Olfactory Glomeruli},
number={1},
volume={18},
issn={0899-7667},
journal={Neural Computation},
pages={10--25},
author={Galán, Roberto Fernandez and Herz, Andreas V. M. and Menzel, Randolf and Weidert, Marcel and Galizia, C. Giovanni}
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<dcterms:abstract xml:lang="eng">Sensory memory is a short-lived persistence of a sensory stimulus in the nervous system, such as iconic memory in the visual system. However, little is known about the mechanisms underlying olfactory sensory memory. We have therefore analyzed the effect of odor stimuli on the first odor-processing network in the honeybee brain, the antennal lobe, which corresponds to the vertebrate olfactory bulb. We stained output neurons with a calcium-sensitive dye and measured across-glomerular patterns of spontaneous activity before and after a stimulus. Such a single-odor presentation changed the relative timing of spontaneous activity across glomeruli in accordance with Hebb's theory of learning. Moreover, during the first few minutes after odor presentation, correlations between the spontaneous activity fluctuations suffice to reconstruct the stimulus. As spontaneous activity is ubiquitous in the brain, modifiable fluctuations could provide an ideal substrate for Hebbian reverberations and sensory memory in other neural systems</dcterms:abstract>
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