Stump sensibility in children with upper limb reduction deficiency

Area of Science:

• Pediatric rehabilitation
• Upper limb prosthetics
• Sensory reinnervation

Background:

• Children with upper limb reduction deficiency often face challenges in sensory perception and functional use of their residual limb.
• Understanding stump sensibility is crucial for optimizing prosthetic fitting and functional outcomes.

Purpose of the Study:

• To compare stump tactile and kinesthetic sensibility in children with upper limb reduction deficiency against their unaffected limb.
• To investigate the relationship between stump sensibility, stump length, and overall activity level.

Main Methods:

• A cross-sectional study involving 31 children and young adults (aged 6-25) with upper limb reduction deficiency.
• Sensory assessments included Semmes-Weinstein monofilaments for touch threshold and the Shape-Texture Identification test for stereognosis.
• Functional status was evaluated using the Child Amputee Prosthetics Project - Functional Status Inventory and the Prosthetic Upper Extremity Functional Index.

Main Results:

• Stump circumference exhibited significantly higher tactile sensitivity (lower touch threshold) compared to the unaffected arm and hand.
• Longer stumps were associated with lower tactile sensitivity.
• Stereognosis and kinesthesia were comparable between affected and unaffected sides; sensibility did not correlate with activity level.

Conclusions:

• Children with upper limb reduction deficiency demonstrate excellent tactile, stereognostic, and kinesthetic sensibility in their affected limb.
• Superior stump sensitivity, particularly at the circumference, may contribute to effective non-prosthetic function and influence prosthesis acceptance.
• These findings highlight the importance of residual limb sensory capabilities in this population.