COGNITIVE NEUROSCIENCE AND NEUROPSYDOLOGYTemporal course of vibrotactile imageryChow, Kari W.S.a; Chan, Chetwyn C.H.a; Huang, Yu-Xiaa b; Liu, Karen P.Y.a; Li, Leonard S.W.c; Lee, Tatia M.C.d Author Information aApplied Cognitive Neuroscience Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University bState Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University cTung Wah Hospital, Hospital Authority dLaboratory of Neuropsychology, The University of Hong Kong, Pokfulam, Hong Kong, China Correspondence to Dr Professor Chetwyn C.H. Chan, PhD, Applied Cognitive Neuroscience Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China Tel: +852 2766 6727; fax: +852 2774 5131; e-mail: [email protected] Received 13 February 2007; accepted 26 February 2007 NeuroReport: July 2, 2007 - Volume 18 - Issue 10 - p 999-1003 doi: 10.1097/WNR.0b013e32815277d7 Buy Metrics Abstract This study examined the temporal courses of imagery processes by having participants imagining vibrotactile sensation as if perceived by the right-hand second finger. The results indicate that the imagery condition elicited a less negative going N400 and then a less positive going P600 than the control condition (perceived without imagining). This is suggestive of a sequential process of retrieving experiences from memory, generating images, and then maintaining the images. Dipole analysis further supports that N400 and P600 (or long latency P300) can be respectively regarded as part of the generic ‘imagery network’ and as modality-specific processes of imagery. © 2007 Lippincott Williams & Wilkins, Inc.