Attentional impairments following right hemisphere damage with and without hemispatial neglect: A comparative study

Area of Science:

• Neuroscience
• Cognitive Psychology
• Rehabilitation Medicine

Background:

• Right hemisphere damage (RHD) can lead to cognitive deficits, including hemispatial neglect (HN).
• Hemispatial neglect significantly impacts daily functioning and requires targeted assessment.
• Cancellation tasks are commonly used to evaluate visual attention and spatial awareness.

Purpose of the Study:

• To compare the performance of patients with RHD, with and without HN, on a cancellation task.
• To identify specific error patterns and search strategies associated with HN in RHD patients.
• To understand the impact of HN on visual scanning and target identification.

Main Methods:

• 31 patients with RHD and 31 age/education-matched controls participated.
• Participants completed a cancellation task assessing omission and random errors.
• Performance metrics included error types, error location, and time to completion.
• Comparison between RHD patients with and without HN, and between RHD patients and controls.

Main Results:

• Patients with RHD and HN made more left-sided omission errors and overall omission errors than RHD patients without HN.
• The initial target cancellation location differed between RHD patients and controls, and between patients with and without HN.
• No significant difference was found in the use of organized versus disorganized search strategies between groups.

Conclusions:

• Hemispatial neglect in RHD patients is associated with increased omission errors, particularly on the left side.
• Spatial attention deficits in HN affect the initial search pattern during visual tasks.
• Further research is needed to explore the performance of patients with varying degrees of hemispatial neglect.