Testing Precision and Accuracy of an Upper Extremity Proprioceptive Targeting Task Assessment

Area of Science:

• Neuroscience
• Rehabilitation Engineering
• Human Motor Control

Background:

• Proprioception, the sense of body position, is vital for motor control.
• Extended physiological proprioception (EPP) is a learned ability to extend this sense to external tools, critical for prosthetic device use.
• Developing reliable assessments for EPP is essential for clinical translation and rehabilitation.

Purpose of the Study:

• To develop and validate an assessment tool for measuring extended physiological proprioception (EPP).
• To evaluate the precision, accuracy, and test-retest reliability of an upper extremity (UE) proprioceptive targeting task.
• To establish normative data for EPP assessment in a nonamputee population.

Main Methods:

• Participants (N=20) performed a UE proprioceptive targeting task in two sessions, separated by one week.
• The task was assessed with eyes open and eyes closed, using dominant and nondominant hands.
• Precision (targeting consistency) and accuracy (closeness to target) were the primary outcome measures.

Main Results:

• Both precision and accuracy significantly decreased when participants closed their eyes (P<.001).
• Dominance affected accuracy in the eyes-open condition, but not in the eyes-closed condition.
• No significant differences in precision or accuracy were found between the two test sessions, indicating good test-retest reliability.

Conclusions:

• The developed assessment is feasible for measuring EPP, demonstrating reliance on proprioception, hand symmetry, and reliability.
• The findings support the use of this assessment for longitudinal measurements and establishing normative values in healthy young adults.
• Further validation in clinical populations is recommended to assess its utility in individuals with limb differences or impairments.