Does lower limb amputation affect lateralization and motor imagery ability in prosthesis users and nonusers? A...

Area of Science:

• Cognitive neuroscience
• Rehabilitation medicine
• Prosthetics and orthotics

Background:

• Lower limb amputation (LLA) impacts body representation, motor planning, and sensorimotor integration.
• The effect of prosthesis use on cognitive functions like laterality judgment and motor imagery post-amputation is not well understood.

Purpose of the Study:

• To investigate the influence of LLA and prosthesis use on laterality judgment and motor imagery.
• To compare cognitive-motor performance between prosthesis users (PU), non-prosthesis users (N-PU), and able-bodied controls.

Main Methods:

• Three participant groups: PU (n=?), N-PU (n=?), and controls (n=?).
• Assessment tools included a laterality judgment task, Vividness of Movement Imagery Questionnaire-2 (VMIQ-2), and imagined Timed Up and Go (iTUG) test.
• Statistical analysis involved ANOVAs and t-tests to compare group performance.

Main Results:

• Non-prosthesis users (N-PU) showed impaired laterality judgment (longer reaction times, lower accuracy) compared to controls.
• Prosthesis users (PU) performed comparably to controls on laterality judgment.
• Both amputee groups exhibited reduced imagery vividness, but PU had better kinesthetic imagery than N-PU. PU and controls showed no significant difference in iTUG performance.

Conclusions:

• Prosthesis use appears to preserve motor imagery and spatial representation abilities in individuals with LLA.
• Findings suggest significant cognitive-motor advantages associated with prosthetic integration.
• Imagery-based assessments should be considered in rehabilitation programs for amputees.