Dual-tasking postural control in patients with right brain damage

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomechanics

Background:

• Dual-tasking presents challenges in stroke neurorehabilitation, potentially impacting functional outcomes.
• The right hemisphere's dominant role in posture control makes right brain-lesioned individuals susceptible to dual-tasking deficits.

Purpose of the Study:

• To investigate cognitive-motor interference during standing in individuals with right brain lesions compared to healthy controls.
• To examine how varying attentional demands affect postural control in dual-tasking scenarios.

Main Methods:

• Subjects maintained a static standing position while performing a control task, a simple attentional task, or a complex attentional task.
• Postural sway was quantified using a force platform, measuring center of pressure and displacements.

Main Results:

• Stroke patients exhibited reduced postural sway compared to healthy subjects under dual-tasking conditions.
• Postural sway decreased in both groups as attentional load increased.
• Stroke patients showed increased stability with rightward weight deviation, particularly with high attentional load and lower limb impairments.

Conclusions:

• Both stroke patients and healthy individuals employ similar postural regulation strategies to maintain stability during dual-tasking with static standing.
• Attentional processes appear to play a facilitative role in static postural control.