2012
DOI: 10.1016/j.neuron.2012.03.015
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Elimination of Inhibitory Synapses Is a Major Component of Adult Ocular Dominance Plasticity

Abstract: During development, cortical plasticity is associated with the rearrangement of excitatory connections. While these connections become more stable with age, plasticity can still be induced in the adult cortex. Here we provide evidence that structural plasticity of inhibitory synapses onto pyramidal neurons is a major component of plasticity in the adult neocortex. In vivo two-photon imaging was used to monitor the formation and elimination of fluorescently labeled inhibitory structures on pyramidal neurons. We… Show more

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Cited by 196 publications
(216 citation statements)
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“…Reducing the levels of inhibition onto excitatory neurons is consistently observed following loss of input in cortex [10,[22][23][24][25][26][27] and has been hypothesized to be a first step in circuit reorganization following input loss [28]. Changes in inhibition can occur via a reduction in the number [12,22,24,26,27,[29][30][31][32][33] or strength of inhibitory synapses onto excitatory cells [33], as well as a reduction in the firing rate of the inhibitory neurons following deprivation either temporarily during development [11,34] or for longer time courses in adulthood [29]. Changes in inhibitory tone may be modulated via astrocytes [35] or NMDA receptor input [36].…”
Section: Mechanisms Of Homeostatic Stabilizationmentioning
confidence: 99%
“…Reducing the levels of inhibition onto excitatory neurons is consistently observed following loss of input in cortex [10,[22][23][24][25][26][27] and has been hypothesized to be a first step in circuit reorganization following input loss [28]. Changes in inhibition can occur via a reduction in the number [12,22,24,26,27,[29][30][31][32][33] or strength of inhibitory synapses onto excitatory cells [33], as well as a reduction in the firing rate of the inhibitory neurons following deprivation either temporarily during development [11,34] or for longer time courses in adulthood [29]. Changes in inhibitory tone may be modulated via astrocytes [35] or NMDA receptor input [36].…”
Section: Mechanisms Of Homeostatic Stabilizationmentioning
confidence: 99%
“…In utero electroporations were performed as described previously [38]. Plasmids drove expression of mito-mTurquoise2 and YFP-F (all adult in vivo experiments).…”
Section: In Utero Electroporationsmentioning
confidence: 99%
“…Cranial window implantation was performed as described [38]. For visualization of putative boutons and mitochondria in V1, animals (P90-P120) were anesthetized with ketamine and xylazine (100 mg/kg and 10 mg/kg i.p., respectively) and fixed on a magnetic head stage in the two-photon setup.…”
Section: In Vivo Two-photon Microscopy In Adult Micementioning
confidence: 99%
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“…Dendritic spines are dynamic structures classically considered as excitatory postsynaptic sites. Intriguingly, dendritic spines are also emerging as inhibitory synaptic sites showing particularly high levels of plasticity 21,22 . Morphological plasticity of dendritic spines tightly correlates with the level of cortical plasticity 23,24 .…”
mentioning
confidence: 99%