Modularity in rehabilitation of working memory: a single-case study.

Area of Science:

• Neurorehabilitation
• Cognitive Psychology

Background:

• Working memory comprises distinct subdomains: phonological loop, visuo-spatial sketchpad, and central executive functions.
• Stroke can lead to impairments across these working memory subdomains.
• Understanding the specificity of rehabilitation is key for effective cognitive recovery.

Observation:

• A stroke patient with chronic working memory deficits underwent a phased rehabilitation program targeting each subdomain sequentially.
• The study employed a multiple-baseline across-behavior design to assess treatment specificity.
• Progress was monitored using domain-specific tests and a general working memory questionnaire.

Findings:

• Rehabilitation targeting the phonological loop significantly improved verbal working memory.
• Training the visuo-spatial sketchpad led to improvements in visuo-spatial tasks.
• Central executive functions showed enhancement primarily after dedicated training for this domain.
• General outcome measures showed improvement across all training phases, indicating generalization effects.

Implications:

• Working memory rehabilitation can yield domain-specific improvements.
• Rehabilitation strategies should be individualized to address specific patient deficits.
• Evidence suggests both specific and generalized effects in cognitive rehabilitation post-stroke.