Hemispheric Differences in Self-evaluation Errors of Upper Extremity Movement in Patients with Chronic Stroke

Area of Science:

• Neuroscience
• Rehabilitation Medicine

Background:

• Brain lesion side impacts upper extremity motor control, movement behavior, and emotional/cognitive function post-stroke.
• Self-evaluation errors, the discrepancy between patient and clinician assessments, are crucial for understanding recovery and rehabilitation needs.

Purpose of the Study:

• To compare self-evaluation errors in patients with left hemisphere damage (LHD) versus right hemisphere damage (RHD) post-stroke.
• To investigate if hemispheric damage influences how stroke survivors perceive their motor performance.

Main Methods:

• Twenty-eight chronic stroke patients (16 with LHD) performed a motor task twice.
• Videotaped movements were evaluated by both patients and clinicians to quantify self-evaluation errors.

Main Results:

• Self-evaluation errors were significantly lower in LHD patients compared to RHD patients (p=.019).
• LHD patients were more likely to underestimate their movement quality, whereas RHD patients tended to overestimate (p=.002 and p=.006, respectively).
• No correlations were found between self-evaluation error and age, cognitive function, physical impairment, emotional control, or time since stroke onset.

Conclusions:

• Hemispheric damage influences self-evaluation accuracy in stroke survivors.
• Therapeutic strategies should consider these differences: encouraging LHD patients to use their affected arm more and addressing impaired self-awareness in RHD patients.