The cognitive and neural correlates of "tactile consciousness": a multisensory perspective.
People's awareness of tactile stimuli has been investigated in far less detail than their awareness of stimuli in other sensory modalities. In an attempt to fill this gap, we provide an overview of studies that are pertinent to the topic of tactile consciousness. We discuss the results of research that has investigated phenomena such as "change blindness", phantom limb sensations, and numerosity judgments in tactile perception, together with the results obtained from the study of patients affected by deficits that can adversely affect tactile perception such as neglect, extinction, and numbsense. The similarities as well as some of the important differences that have emerged when visual and tactile conscious information processing have been compared using similar experimental procedures are highlighted. We suggest that conscious information processing in the tactile modality cannot be separated completely from the more general processing of spatial information in the brain. Finally, the importance of considering tactile consciousness within the larger framework of multisensory information processing is also discussed.
Gallace
Alberto
A
Crossmodal Research Laboratory, Department of Experimental Psychology, Oxford University, South Parks Road, Oxford OX1 3UD, UK. alberto.gallace@psy.ox.ac.uk
Spence
Charles
C
D001288:Attention; D003243:Consciousness; D006801:Humans; D008568:Memory; D010468:Perceptual Disorders; D010469:Perceptual Distortion; D013003:Somatosensory Cortex / Q000502:physiology; D013028:Space Perception / Q000502:physiology; D013998:Time Perception; D014110:Touch / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology