Ambient sensory conditions: modification of receptive speech deficits in left-side stroke patients using bright light.

Previous research has demonstrated the potential for the use of ambient sensory conditions to improve cognitive functioning. Both light and sound have been shown to improve task performance in various populations including children, younger adults, and elderly participants; however, these cognitive gains may possibly be offset by detrimental cardiovascular reactivity in elderly persons. We now have some evidence for ambient sensory conditions affecting cognitive function following left- or right-side cerebrovascular accidents.