Odor-Driven Attractor Dynamics in the Antennal Lobe Allow for Simple and Rapid Olfactory Pattern Classification Export

@article{citeulike:696271, abstract = {The antennal lobe plays a central role for odor processing in insects, as demonstrated by electrophysiological and imaging experiments. Here we analyze the detailed temporal evolution of glomerular activity patterns in the antennal lobe of honeybees. We represent these spatiotemporal patterns as trajectories in a multidimensional space, where each dimension accounts for the activity of one glomerulus. Our data show that the trajectories reach odor-specific steady states (attractors) that correspond to stable activity patterns at about 1 second after stimulus onset. As revealed by a detailed mathematical investigation, the trajectories are characterized by different phases: response onset, steady-state plateau, response offset, and periods of spontaneous activity. An analysis based on support-vector machines quantifies the odor specificity of the attractors and the optimal time needed for odor discrimination. The results support the hypothesis of a spatial olfactory code in the antennal lobe and suggest a perceptron-like readout mechanism that is biologically implemented in a downstream network, such as the mushroom body.}, author = {Roberto and Sachse, Silke and Galizia, Giovanni C. and Herz, Andreas V. M.}, citeulike-article-id = {696271}, citeulike-linkout-0 = {http://www.mitpressjournals.org/doi/abs/10.1162/089976604773135078}, day = {13}, journal = {Neural Computation}, keywords = {neuro, sensory}, month = {March}, number = {5}, pages = {999--1012}, posted-at = {2006-06-15 00:32:48}, priority = {3}, publisher = {MIT Press Journals}, title = {Odor-Driven Attractor Dynamics in the Antennal Lobe Allow for Simple and Rapid Olfactory Pattern Classification}, url = {http://www.mitpressjournals.org/doi/abs/10.1162/089976604773135078}, volume = {16}, year = {2004} }

TY - JOUR ID - citeulike:696271 L3 - citeulike-article-id:696271 N2 - The antennal lobe plays a central role for odor processing in insects, as demonstrated by electrophysiological and imaging experiments. Here we analyze the detailed temporal evolution of glomerular activity patterns in the antennal lobe of honeybees. We represent these spatiotemporal patterns as trajectories in a multidimensional space, where each dimension accounts for the activity of one glomerulus. Our data show that the trajectories reach odor-specific steady states (attractors) that correspond to stable activity patterns at about 1 second after stimulus onset. As revealed by a detailed mathematical investigation, the trajectories are characterized by different phases: response onset, steady-state plateau, response offset, and periods of spontaneous activity. An analysis based on support-vector machines quantifies the odor specificity of the attractors and the optimal time needed for odor discrimination. The results support the hypothesis of a spatial olfactory code in the antennal lobe and suggest a perceptron-like readout mechanism that is biologically implemented in a downstream network, such as the mushroom body. IS - 5 JF - Neural Computation EP - 1012 TI - Odor-Driven Attractor Dynamics in the Antennal Lobe Allow for Simple and Rapid Olfactory Pattern Classification PB - MIT Press Journals VL - 16 SP - 999 KW - neuro KW - sensory AU - Roberto AU - Sachse, Silke AU - Galizia, Giovanni AU - Herz, Andreas PY - 2004/03/13/ UR - http://www.mitpressjournals.org/doi/abs/10.1162/089976604773135078 ER -