Cross Modal Re Organization in Clinical Populations with Hearing Loss
We review evidence for cross modal cortical re organization in clinical populations with hearing loss. Cross modal plasticity refers to the ability for an intact sensory modality (e.g. vision or somatosensation) to recruit cortical brain regions from a deprived sensory modality (e.g. audition) to carry out sensory processing. We describe evidence for cross modal changes in hearing loss across the age spectrum and across different degrees of hearing impairment, including children with profound, bilateral deafness with cochlear implants, single sided deafness before and after cochlear implantation, and adults with early stage, mild moderate, age related hearing loss. Understanding cross modal plasticity in the context of auditory deprivation, and the potential for reversal of these changes following intervention, may be vital in directing intervention and rehabilitation options for clinical populations with hearing loss.
Brain sciences