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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Markram, Henry Kalisman, Nir Silberberg, Gilad |
| Description | Author Affiliation: Kalisman N ( Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel.); |
| Abstract | The neocortex has a high capacity for plasticity. To understand the full scope of this capacity, it is essential to know how neurons choose particular partners to form synaptic connections. By using multineuron whole-cell recordings and confocal microscopy we found that axons of layer V neocortical pyramidal neurons do not preferentially project toward the dendrites of particular neighboring pyramidal neurons; instead, axons promiscuously touch all neighboring dendrites without any bias. Functional synaptic coupling of a small fraction of these neurons is, however, correlated with the existence of synaptic boutons at existing touch sites. These data provide the first direct experimental evidence for a tabula rasa-like structural matrix between neocortical pyramidal neurons and suggests that pre- and postsynaptic interactions shape the conversion between touches and synapses to form specific functional microcircuits. These data also indicate that the local neocortical microcircuit has the potential to be differently rewired without the need for remodeling axonal or dendritic arbors. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 3 |
| Volume Number | 102 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2005-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Neocortex Physiology Neurons Animals Axons Ultrastructure Dendrites Electrophysiology Imaging, Three-Dimensional Microscopy, Confocal Cytology Nerve Regeneration Rats, Wistar Synapses Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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