Is recalibration more important than realignment in prism adaptation training for visuospatial neglect? A randomized...

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Cognitive Psychology

Background:

• Visuospatial neglect (VSN) is a cognitive disorder impacting attention to one side of space.
• Prism adaptation training (PAT) is a potential treatment for VSN, involving recalibration and realignment.
• The effectiveness of different PAT protocols, particularly regarding movement visibility, requires investigation.

Purpose of the Study:

• To evaluate the efficacy of different Prism adaptation training (PAT) protocols for visuospatial neglect (VSN).
• To compare single-step versus multi-step PAT protocols with varying degrees of movement visibility.
• To determine if conscious awareness of movement errors is crucial for VSN remediation.

Main Methods:

• A randomized controlled trial involving 25 VSN patients.
• Four PAT protocols were administered: multi-step with terminal exposure, single-step with concurrent exposure, single-step without movement visibility, and sham PAT.
• Primary outcome: response time (RT) in a Posner task; secondary outcome: sensorimotor aftereffect.

Main Results:

• Protocols minimizing movement visibility yielded significant sensorimotor aftereffects.
• The single-step protocol without movement visibility showed a trend towards improving leftward visuospatial attention.
• No significant differences were found between the most promising PAT protocol and sham PAT.

Conclusions:

• Maximizing conscious awareness of movement errors may be a key factor in VSN treatment.
• Preliminary evidence suggests potential benefits of specific PAT protocols for visuospatial attention.
• Further research is necessary to confirm the specificity and optimize PAT for VSN remediation.