期刊
JOURNAL OF NEUROSCIENCE
卷 27, 期 35, 页码 9427-9438出版社
SOC NEUROSCIENCE
DOI: 10.1523/JNEUROSCI.0664-07.2007
关键词
olfactory bulb; glomerulus; odor deprivation; sensory scaling; olfactory sensory axon; compensatory plasticity
资金
- NINDS NIH HHS [F32 NS050976, NS050976] Funding Source: Medline
Experience-dependent changes in neural circuits have traditionally been investigated several synapses downstream of sensory input. Whether experience can alter the strength of primary sensory synapses remains mostly unknown. To address this issue, we investigated the consequences of odor deprivation on synapses made by olfactory sensory axons in the olfactory bulb of rats. Odor deprivation triggered an increase in the probability of glutamate release from olfactory sensory neuron synapses. Deprivation also increased the amplitude of quantal synaptic currents mediated by AMPA- and NMDA-type glutamate receptors, as well as the abundance of these receptors in the glomerular region. Our results demonstrate that sensory experience is capable of modulating synaptic strength at the earliest stages of information transfer between the environment and an organism. Such compensatory experience-dependent changes may represent a mechanism of sensory gain control.
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