Topic: Somatosensory evoked potentials

The spatial coding of tactile information is functionally essential for touch-based shape perception and motor control. However, the spatiotemporal dynamics of how tactile information is remapped from the somatotopic reference frame in the primary somatosensory cortex to the spatiotopic reference frame remains unclear. This study investigated how hand position in space or posture influences cortical somatosensory processing. Twenty-two healthy subjects received electrical stimulation to the right thumb (D1) or little finger (D5) in three position conditions: palm down on right side of the body

Imagery of sensations and attention to them are mental operations that have similarities but differ in function. Imagery generates internal sensory representations while attention prioritizes external or internal signals. This distinction is less clear in certain sensory systems such as the somatosensory system. Our study aimed to explore neural activity changes induced by tactile imagery (TI) and tactile attention (TA). Given the established facilitatory effect of TI on somatosensory processing, our study also aimed to investigate the effects of TA on somatosensory processing.Ten participants