Walking and wheelchair navigation in patients with left visual neglect

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Cognitive Psychology

Background:

• Unilateral spatial neglect (USN) is a common deficit following right hemisphere stroke.
• Patients with USN often exhibit deviations in navigation, but literature presents conflicting findings regarding the direction of these deviations.
• Understanding these navigational patterns is crucial for effective rehabilitation strategies.

Purpose of the Study:

• To investigate the navigational trajectory of patients with USN in an ecological setting.
• To determine if the direction of deviation in USN is dependent on mobility status (walking vs. wheelchair) or the specific navigation task.

Main Methods:

• Fifteen patients with left-sided USN post-right hemisphere stroke were observed.
• Navigational paths and collisions were recorded while patients walked or used a powered wheelchair in a corridor.
• Two ambulant patients were tested in both walking and wheelchair conditions to assess task dependency.

Main Results:

• Patients using wheelchairs consistently deviated to the left of the corridor's center.
• Patients walking consistently deviated to the right of the corridor's center.
• The same patients showed leftward deviation when using a wheelchair and rightward deviation when walking, supporting task dependency.

Conclusions:

• The direction of navigational deviation in patients with USN is task-dependent, not solely patient-dependent.
• Mobility status significantly influences the direction of deviation in spatial neglect.
• Further research is needed to elucidate the specific features of walking versus wheelchair navigation that cause this dissociation.