PMC:2940453 / 16969-18784
Annnotations
{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/2940453","sourcedb":"PMC","sourceid":"2940453","source_url":"https://www.ncbi.nlm.nih.gov/pmc/2940453","text":"Reconstruction: This is the final stage where information is decoded from AP phases. The decoding, again, relies on the interference principle. The compressed code reaches cortical neurons, such as granule cells in a V1 column, through multiple parallel axons, each terminating on individual neurons. We assume that cortical neurons, like sensory neurons, generate spatially and temporally coherent SMOs that propagate in a radial fashion. For the sake of simplicity, we further assume that the frequency and spatial phase gradient of this SMO field are the same as the SMO field at the sensory organ. Although each layer-4 neuron receives the same AP sequence, individual APs within the sequence may originate from different sensory neurons. The task of the cortical network is to sort these APs according to their origin and route them to specific supragranular layer neurons that will reproduce the input activity pattern. This may seem like an extremely complicated task considering the combinatorial complexity, but it is easily accomplished using the interference principle. By projecting the input APs on the SMO field and letting their coincidences select the neurons capable of firing an AP, the network will generate a coherent spatio-temporal pattern (Figure 2). Provided there is topographical isomorphism between the input SMO field and the target SMO field, any given AP from the input sequence will precisely coincide with the SMO peak of a neuron that represents the same anatomical distance as the input neuron to which it was originally aligned in Stage 2 (Figure 5). As a result, the output of these neurons in the supragranular layer of the cortex will reproduce the original sensory input and form a sparse representation (high spatial specificity and low firing rate; Sakata and Harris, 2009).","tracks":[{"project":"0_colil","denotations":[{"id":"20859525-19914188-532864","span":{"begin":1809,"end":1813},"obj":"19914188"}],"attributes":[{"subj":"20859525-19914188-532864","pred":"source","obj":"0_colil"}]},{"project":"2_test","denotations":[{"id":"20859525-19914188-38434991","span":{"begin":1809,"end":1813},"obj":"19914188"}],"attributes":[{"subj":"20859525-19914188-38434991","pred":"source","obj":"2_test"}]},{"project":"TEST0","denotations":[{"id":"20859525-223-231-532864","span":{"begin":1809,"end":1813},"obj":"[\"19914188\"]"}],"attributes":[{"subj":"20859525-223-231-532864","pred":"source","obj":"TEST0"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"0_colil","color":"#ecb593","default":true},{"id":"2_test","color":"#9b93ec"},{"id":"TEST0","color":"#a4ec93"}]}]}}