Functional outcomes can vary by dose: learning-based sensorimotor training for patients stable poststroke.

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Physical Therapy

Background:

• Stroke survivors often experience persistent upper limb deficits.
• Learning-based sensorimotor training (LBSMT) leverages neuroplasticity principles to enhance motor recovery.
• Optimizing LBSMT dosage is crucial for maximizing functional gains in stable poststroke patients.

Purpose of the Study:

• To investigate the dose-response relationship between LBSMT intensity and upper limb functional recovery in stable poststroke individuals.
• To determine if varying LBSMT dosages significantly impact functional independence, strength, sensory discrimination, and fine motor skills.

Main Methods:

• A cohort of 45 stable poststroke patients participated in a 6-8-week LBSMT program with varied dosages: low (1x/week), moderate (3x/week), and high (4x/week).
• All participants engaged in home-based practice to supplement supervised training sessions.
• Primary outcome measures included assessments of functional independence, muscle strength, sensory discrimination, and fine motor skills.

Main Results:

• All participants demonstrated significant improvements across all measured variables (9.0%-38.9% gain; P < .001).
• The high-intensity group (4x/week) showed superior gains in functional independence, sensory discrimination, and fine motor skills compared to lower-intensity groups.
• A significant linear trend indicated that increased LBSMT dosage correlated positively with greater functional independence.

Conclusions:

• Learning-based sensorimotor training is an effective intervention for improving upper limb function in patients stable poststroke.
• The observed functional improvements are dose-dependent, with higher intensity LBSMT yielding the most significant benefits.
• Higher intensity training protocols may offer a more efficient pathway to substantial functional recovery.