Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex
This paper presents a model for the general flow in the neocortex. The basic process, called "sequence-seeking," is a search for a sequence of mappings or transformations, linking source and target representations. The search is bi-directional, "bottom-up" as well as "top-do...
| Main Author: | |
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| Language: | en_US |
| Published: |
2004
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| Online Access: | http://hdl.handle.net/1721.1/6574 |
| _version_ | 1826207876433051648 |
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| author | Ullman, Shimon |
| author_facet | Ullman, Shimon |
| author_sort | Ullman, Shimon |
| collection | MIT |
| description | This paper presents a model for the general flow in the neocortex. The basic process, called "sequence-seeking," is a search for a sequence of mappings or transformations, linking source and target representations. The search is bi-directional, "bottom-up" as well as "top-down," and it explores in parallel a large numbe rof alternative sequences. This operation is implemented in a structure termed "counter streams," in which multiple sequences are explored along two separate, complementary pathways which seeking to meet. The first part of the paper discusses the general sequence-seeking scheme and a number of related processes, such as the learning of successful sequences, context effects, and the use of "express lines" and partial matches. The second part discusses biological implications of the model in terms of connections within and between cortical areas. The model is compared with existing data, and a number of new predictions are proposed. |
| first_indexed | 2024-09-23T13:56:21Z |
| id | mit-1721.1/6574 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:56:21Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | mit-1721.1/65742019-04-12T08:31:32Z Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex Ullman, Shimon This paper presents a model for the general flow in the neocortex. The basic process, called "sequence-seeking," is a search for a sequence of mappings or transformations, linking source and target representations. The search is bi-directional, "bottom-up" as well as "top-down," and it explores in parallel a large numbe rof alternative sequences. This operation is implemented in a structure termed "counter streams," in which multiple sequences are explored along two separate, complementary pathways which seeking to meet. The first part of the paper discusses the general sequence-seeking scheme and a number of related processes, such as the learning of successful sequences, context effects, and the use of "express lines" and partial matches. The second part discusses biological implications of the model in terms of connections within and between cortical areas. The model is compared with existing data, and a number of new predictions are proposed. 2004-10-08T20:28:49Z 2004-10-08T20:28:49Z 1991-12-01 AIM-1311 http://hdl.handle.net/1721.1/6574 en_US AIM-1311 4675690 bytes 3654794 bytes application/postscript application/pdf application/postscript application/pdf |
| spellingShingle | Ullman, Shimon Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex |
| title | Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex |
| title_full | Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex |
| title_fullStr | Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex |
| title_full_unstemmed | Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex |
| title_short | Sequence-Seeking and Counter Streams: A Model for Information Processing in the Cortex |
| title_sort | sequence seeking and counter streams a model for information processing in the cortex |
| url | http://hdl.handle.net/1721.1/6574 |
| work_keys_str_mv | AT ullmanshimon sequenceseekingandcounterstreamsamodelforinformationprocessinginthecortex |