Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing
In a dendritic tree transient synaptic inputs activating ionic conductances with an equilibrium potential near the resting potential can veto very effectively other excitatory inputs. Analog operations of this type can be very specific with respect to relative locations of the inputs and their...
| Main Authors: | , |
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| Language: | en_US |
| Published: |
2004
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| Online Access: | http://hdl.handle.net/1721.1/6367 |
| _version_ | 1811082658634006528 |
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| author | Poggio, T. Koch, C. |
| author_facet | Poggio, T. Koch, C. |
| author_sort | Poggio, T. |
| collection | MIT |
| description | In a dendritic tree transient synaptic inputs activating ionic conductances with an equilibrium potential near the resting potential can veto very effectively other excitatory inputs. Analog operations of this type can be very specific with respect to relative locations of the inputs and their timing. We examine with computer experiments the precise conditions underlying this effect in the case of b-like cat retinal ganglion cell. The critical condition required for strong and specific interactions is that the peak inhibitory conductance change must be sufficiently large almost independently of other electrical parameters. In this case, a passive dendritic tree may perform hundreds of independent analog operations on its synaptic inputs, without requiring any threshold mechanism. |
| first_indexed | 2024-09-23T12:06:54Z |
| id | mit-1721.1/6367 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:06:54Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/63672019-04-10T16:32:38Z Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing Poggio, T. Koch, C. In a dendritic tree transient synaptic inputs activating ionic conductances with an equilibrium potential near the resting potential can veto very effectively other excitatory inputs. Analog operations of this type can be very specific with respect to relative locations of the inputs and their timing. We examine with computer experiments the precise conditions underlying this effect in the case of b-like cat retinal ganglion cell. The critical condition required for strong and specific interactions is that the peak inhibitory conductance change must be sufficiently large almost independently of other electrical parameters. In this case, a passive dendritic tree may perform hundreds of independent analog operations on its synaptic inputs, without requiring any threshold mechanism. 2004-10-04T14:53:26Z 2004-10-04T14:53:26Z 1981-09-01 AIM-657 http://hdl.handle.net/1721.1/6367 en_US AIM-657 2868419 bytes 2079271 bytes application/postscript application/pdf application/postscript application/pdf |
| spellingShingle | Poggio, T. Koch, C. Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing |
| title | Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing |
| title_full | Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing |
| title_fullStr | Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing |
| title_full_unstemmed | Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing |
| title_short | Nonlinear Interactions in a Dendritic Tree: Localization, Timing and Role in Information Processing |
| title_sort | nonlinear interactions in a dendritic tree localization timing and role in information processing |
| url | http://hdl.handle.net/1721.1/6367 |
| work_keys_str_mv | AT poggiot nonlinearinteractionsinadendritictreelocalizationtimingandroleininformationprocessing AT kochc nonlinearinteractionsinadendritictreelocalizationtimingandroleininformationprocessing |