Somatotopic map and inter- and intra-digit distance in Brodmann area 2 by pressure stimulation

The somatotopic representation of the tactile stimulation on the finger in the brain is an essential part of understanding the human somatosensory system as well as rehabilitation and other clinical therapies. Many studies have used vibrotactile stimulations and reported finger somatotopic representations in the Brodmann area 3 (BA 3). On the contrary, few studies investigated finger somatotopic representation using pressure stimulations. Therefore, the present study aimed to find a comprehensive somatotopic representation (somatotopic map and inter- and intra-digit distance) within BA 2 of humans that could describe tactile stimulations on different joints across the fingers by applying pressure stimulation to three joints-the first (p1), second (p2), and third (p3) joints-of four fingers (index, middle, ring, and little finger). Significant differences were observed in the inter-digit distance between the first joints (p1) of the index and little fingers, and between the third joints (p3) of the index and little fingers. In addition, a significant difference was observed in the intra-digit distance between p1 and p3 of the little finger. This study suggests that a somatotopic map and inter- and intra-digit distance could be found in BA 2 in response to pressure stimulation on finger joints.ope

fMRI to intraneural microstimulation of single mechanoreceptive afferents

fMRI raw time series acquired during intranerual microstimulation (INMS) of single mechanoreceptive units (11 datasets, named U1_INMS.nii.gz etc..). <div>fMRI raw time series acquired during vibrotactile stimulation to the corresponding unit's receptive field (U1_vibrotactile.nii.gz etc ...). <div>Structural whole head MRI scans for 4 participants for which fMRI data was acquired. </div><div>Full description of the type of mechanoreceptive units stimulated during fMRI per subject, paradigm used,  etc .. can be found in the following paper:  Sanchez Panchuelo RM, Ackerley R, Glover PM, Bowtell RW, Westberg J, Francis ST & McGlone F, "Mapping quantal touch using 7 Tesla functional magnetic resonance imaging and single-unit intraneural microstimulation" eLife, 2016;10.7554/eLife.12812. </div><p></p> </div