Development of coherent neuronal activity patterns in mammalian cortical networks: common principles and local hetereogeneity
Many mammals are born in a very immature state and develop their rich repertoire of behavioral and cognitive functions postnatally. This development goes in parallel with changes in the anatomical and functional organization of cortical structures which are involved in most complex activities. The e...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2013
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| In: |
Mechanisms of development
Year: 2012, Jahrgang: 130, Heft: 6/8, Pages: 412-423 |
| ISSN: | 1872-6356 |
| Online-Zugang: |
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| Verfasserangaben: | Alexei V. Egorov, Andreas Draguhn |
MARC
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| 245 | 1 | 0 | |a Development of coherent neuronal activity patterns in mammalian cortical networks |b common principles and local hetereogeneity |c Alexei V. Egorov, Andreas Draguhn |
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| 520 | |a Many mammals are born in a very immature state and develop their rich repertoire of behavioral and cognitive functions postnatally. This development goes in parallel with changes in the anatomical and functional organization of cortical structures which are involved in most complex activities. The emerging spatiotemporal activity patterns in multi-neuronal cortical networks may indeed form a direct neuronal correlate of systemic functions like perception, sensorimotor integration, decision making or memory formation. During recent years, several studies--mostly in rodents--have shed light on the ontogenesis of such highly organized patterns of network activity. While each local network has its own peculiar properties, some general rules can be derived. We therefore review and compare data from the developing hippocampus, neocortex and--as an intermediate region--entorhinal cortex. All cortices seem to follow a characteristic sequence starting with uncorrelated activity in uncoupled single neurons where transient activity seems to have mostly trophic effects. In rodents, before and shortly after birth, cortical networks develop weakly coordinated multineuronal discharges which have been termed synchronous plateau assemblies (SPAs). While these patterns rely mostly on electrical coupling by gap junctions, the subsequent increase in number and maturation of chemical synapses leads to the generation of large-scale coherent discharges. These patterns have been termed giant depolarizing potentials (GDPs) for predominantly GABA-induced events or early network oscillations (ENOs) for mostly glutamatergic bursts, respectively. During the third to fourth postnatal week, cortical areas reach their final activity patterns with distinct network oscillations and highly specific neuronal discharge sequences which support adult behavior. While some of the mechanisms underlying maturation of network activity have been elucidated much work remains to be done in order to fully understand the rules governing transition from immature to mature patterns of network activity. | ||
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| 650 | 4 | |a Animals | |
| 650 | 4 | |a Entorhinal Cortex | |
| 650 | 4 | |a Hippocampus | |
| 650 | 4 | |a Humans | |
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| 650 | 4 | |a Nerve Net | |
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| 650 | 4 | |a Organ Specificity | |
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| 650 | 4 | |a Synapses | |
| 650 | 4 | |a Synaptic Potentials | |
| 650 | 4 | |a Synaptic Transmission | |
| 700 | 1 | |a Draguhn, Andreas |d 1961- |e VerfasserIn |0 (DE-588)121130282 |0 (DE-627)081107102 |0 (DE-576)292552394 |4 aut | |
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