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AJNR - American Journal of Neuroradiology

Published ahead of print on July 3, 2008
doi: 10.3174/ajnr.A1191

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Dissociation of the Neural Networks Recruited during a Haptic Object-Recognition Task: Complementary Results with a Tensorial Independent Component Analysis

C. Habas^a and E.A. Cabanis^a

^a From the Service de NeuroImagerie, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris, France

View larger version (46K): [in this window] [in a new window]   Fig 1. A–B, For the motor task, multisubject (n = 14) spatial maps (A1–B1, axial sections) and time courses (A2–B2) of the independent components computed during the nondiscrimination task. A2–B2, Horizontal red and blue bars represent the first rest and activity phases, each lasting 15 seconds. A2–B2, Axial sections. Z-score is represented by a color gradient (vertical colored bar). Boxplots (on the extreme right side of the figures) display the relative response amplitude across the multisubject domain for the corresponding independent component sorted in decreasing order of the median response (median and upper and lower quartile are shown). CER indicates cerebellum; CING, cingulate cortex; GR, geniculate region; INS, insula; M1/S1, sensorimotor cortex; OCC, occipital cortex; PAR, parietal cortex; PFC, prefrontal cortex; PMC, premotor cortex; SII, secondary sensory area; SMA, supplementary motor area; ST, striatum; TEMP, temporal cortex; THAL, thalamus; TOC, temporo-occipital cortex; a, anterior; p, posterior.

View larger version (65K): [in this window] [in a new window]   Fig 2. Multisubject (n = 14) time-courses (A1–F1) and spatial maps (A2–F2, A3) of the independent components (A–F) computed during the tactile discrimination task. A1–F1, Horizontal red and blue bars represent the first rest and activity phases, each lasting 15 seconds. A2–F2, Axial sections. A3, Coronal section passing through the cerebellum. Z-score is represented by a color gradient (vertical colored bar). Boxplots (on the extreme right side of the figures) display the relative response amplitude across the multisubject domain for the corresponding independent component sorted in decreasing order of the median response (median and upper and lower quartile are shown). CER indicates cerebellum; CING, cingulate cortex; GR, geniculate region; INS, insula; M1/S1, sensorimotor cortex; OCC, occipital cortex; PAR, parietal cortex; PFC, prefrontal cortex; PMC, premotor cortex; SII, secondary sensory area; SMA, supplementary motor area; ST, striatum; TEMP, temporal cortex; THAL, thalamus; TOC, temporo-occipital cortex; a, anterior; p, posterior.