Intracutaneous Electrodes: Electrodes directly inserted into the nerves.
Electrocutaneous Display: A device that stimulates nerve afferents within the skin by electric current and can be constituted by several surface electrodes.
Electrocutaneous (or electrotactile) Stimulation: The evocation of a tactile sensation using an electric current flowing through the skin, via electrodes placed on the skin surface.
Merkel Cells: Slowly adapting (SA) afferents that are sensitive to points, edges, and curvature. They are responsible for form and texture perception.
Transcutaneous Electrodes: Electrodes placed in contact with the skin.
Functional magnetic resonance imaging (fMRI): Imaging technique based on blood oxygenation level dependent (BOLD) effect that allows localization of blood flow variations and oxygen consumption due to neuronal firing.
Mechanoreceptors: Cutaneous receptors that are sensitive to mechanical stimuli that are skin motion, skin stretch, pressure, vibration, points, edges, curvature.
Meissner Corpuscles: Rapidly adapting (RA) afferents that innervate the skin densely and are sensitive to dynamic skin deformation. They transmit a robust neural image of skin motion.