The neural substrate for working memory of tactile surface texture.

Human Brain Mapping
Amanda L KaasRainer Goebel

Abstract

Fine surface texture is best discriminated by touch, in contrast to macro geometric features like shape. We used functional magnetic resonance imaging and a delayed match-to-sample task to investigate the neural substrate for working memory of tactile surface texture. Blindfolded right-handed males encoded the texture or location of up to four sandpaper stimuli using the dominant or non-dominant hand. They maintained the information for 10-12 s and then answered whether a probe stimulus matched the memory array. Analyses of variance with the factors Hand, Task, and Load were performed on the estimated percent signal change for the encoding and delay phase. During encoding, contralateral effects of Hand were found in sensorimotor regions, whereas Load effects were observed in bilateral postcentral sulcus (BA2), secondary somatosensory cortex (S2), pre-SMA, dorsolateral prefrontal cortex (dlPFC), and superior parietal lobule (SPL). During encoding and delay, Task effects (texture > location) were found in central sulcus, S2, pre-SMA, dlPFC, and SPL. The Task and Load effects found in hand- and modality-specific regions BA2 and S2 indicate involvement of these regions in the tactile encoding and maintenance of fine surface texture...Continue Reading

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Citations

Jun 26, 2013·Journal of Physiology, Paris·Liping WangYong-Di Zhou
Jan 19, 2016·NeuroImage·Hua-Chun SunMassimiliano Di Luca
Aug 6, 2013·Human Brain Mapping·Bernhard SpitzerFelix Blankenburg
Aug 25, 2015·The European Journal of Neuroscience·Veronika ZlatkinaMichael Petrides
Sep 21, 2013·Cerebral Cortex·Francesca MauleLuigi Cattaneo
Feb 6, 2020·Frontiers in Neuroscience·Xinjian JiangHuimin Wang
Dec 1, 2016·Hong Kong Journal of Occupational Therapy : HKJOT·Si-Nae AhnSujin Hwang

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