Christophe Habas1, Emmanuel Alain Cabanis. 1. Service de NeuroImagerie, Hôpital des Quinze-Vingts, UPMC Paris 6, 28, rue de Charenton, 75012 Paris, France. chabas@quinze-vingts.fr
Abstract
INTRODUCTION: The cerebral and cerebellar network involved in a bimanual object recognition was studied in blood oxygenation dependent level functional magnetic resonance imaging (fMRI). METHODS: Nine healthy right-handed volunteers were scanned (1) while performing bilateral finger movements (nondiscrimination motor task), and (2) while performing a bimanual tactile-tactile matching discrimination task using small chess pieces (tactile discrimination task). RESULTS: Extensive activations were specifically observed in the parietal (SII, superior lateral lobule), insular, prefrontal, cingulate and neocerebellar cortices (HVIII), with a left predominance in motor areas, during the tactile discrimination task in contrast to the findings during the nondiscrimination motor task. CONCLUSION: Bimanual tactile-tactile matching discrimination recruits multiple sensorimotor and associative cerebral and neocerebellar networks (including the cerebellar second homunculus, HVIII), comparable to the neural circuits involved in unimanual tactile object recognition.
INTRODUCTION: The cerebral and cerebellar network involved in a bimanual object recognition was studied in blood oxygenation dependent level functional magnetic resonance imaging (fMRI). METHODS: Nine healthy right-handed volunteers were scanned (1) while performing bilateral finger movements (nondiscrimination motor task), and (2) while performing a bimanual tactile-tactile matching discrimination task using small chess pieces (tactile discrimination task). RESULTS: Extensive activations were specifically observed in the parietal (SII, superior lateral lobule), insular, prefrontal, cingulate and neocerebellar cortices (HVIII), with a left predominance in motor areas, during the tactile discrimination task in contrast to the findings during the nondiscrimination motor task. CONCLUSION: Bimanual tactile-tactile matching discrimination recruits multiple sensorimotor and associative cerebral and neocerebellar networks (including the cerebellar second homunculus, HVIII), comparable to the neural circuits involved in unimanual tactile object recognition.
Authors: M Cornelia Stoeckel; Bruno Weder; Ferdinand Binkofski; Giovanni Buccino; N Jon Shah; Rüdiger J Seitz Journal: Neuroimage Date: 2003-07 Impact factor: 6.556
Authors: Leighton B Hinkley; Leah A Krubitzer; Srikantan S Nagarajan; Elizabeth A Disbrow Journal: J Neurophysiol Date: 2006-11-22 Impact factor: 2.714