Dominant and subdominant hand exhibit different cortical activation patterns during tactile stimulation: An fNIRS study

Vibration Alert to the Brain: Evoked and Induced MEG Responses to High-Frequency Vibrotactile Stimuli on the Index Finger of Dominant and Non-dominant Hand

“…Interestingly, a significant difference in the alpha suppression effect between conditions was observed in more broadly distributed areas in the right hemisphere, mainly driven by alpha suppression in response to left index finger stimulation. Our result supports previous observations that more broadly distributed cortical areas are activated for tactile perception of the subdominant hand and that a more efficient and cortically concentrated neural process is developed for tactile perception of the dominant hand (Pihko et al, 2009;Yang et al, 2018). On the other hand, no significant difference was found during left or right index finger stimulations in bilateral enhancements of alpha activity in the posterior areas.…”

Hemispheric asymmetry in hand preference of right-handers for passive vibrotactile perception: an fNIRS study

“…However, they didn't present any statistical support for the hemispheric asymmetry between two hands while tactile sensation. Our previous study of hemispheric asymmetry in tactile perception for small group of right-handed participants (n = 10) supplied a clue that preferred (right) hand could represent greater hemispheric asymmetry in haptic perception than less-preferred (left) hand 18 . Therefore, for larger group of subjects (n = 31), it was predicted that in cutaneous haptic perception, preferred hand would be more strongly lateralized than less-preferred hand and that cortical facilitation would be larger when touching with the less-preferred hand as compared to the preferred hand.…”

“…The results only suggested that passive touch could activate the sensorimotor cortex, but didn't show the hemispheric asymmetry of cutaneous perception for hand preference. From our pilot study of cortical activation observation during vibrotactile stimulation on finger, less-preferred hand showed broader cortical activation than preferred hand and it suggested that cutaneous tactile stimulation by quantitative tactile display could induce different hemispheric facilitation 18 . In this study, a solenoid resonance actuator and stimulation controller were custom-made in order to provide controllable stimulation with its constant amplitude and accurate timing.…”

“…Haptic perception accompanies cutaneous perception, that is, sensory information coded by cutaneous and proprioceptive mechanoreceptors is transmitted to the central nervous system by two separate major ascending pathways. On the aforementioned evidences of the hemispheric asymmetry of right-handers in haptic perception [10][11][12][13][14][15] and the clue of the hemispheric asymmetry of right-handers in cutaneous perception 18 , it is postulated that preferred hand of right-handers would show stronger hemispheric asymmetry in cutaneous perception without any task-relevant conditions.…”

OptoNet: a MATLAB-based toolbox for cortical network analyses using functional near-infrared spectroscopy

“…This is indicative of the fact that there is much stronger and wider activation from the left-hand movements than the right-hand, and it appears to be in accordance with efficient activities of the dominant hand, which represents a small area because it is using the brain efficiently and because it is used for the action. [51][52][53] However, the elicited outcomes cannot be clearly demonstrated based only on brain activation maps. Lee, Park, and Jung: OptoNet: a MATLAB-based toolbox for cortical network analyses.…”