Median Nerve Function During Phalen's Test

Recruiting

• Conditions: Carpal Tunnel Syndrome
• Interventions: Diagnostic Test: Phalen's wrist flexion test

• Registration Number: NCT05965791
• Lead Sponsor: Ahram Canadian University

Brief Summary

This study will use electromyography and nerve conduction studies to evaluate median nerve function during the Phalen's wrist flexion test in different wrist positions.

Detailed Description

The Phalen's test is commonly used to assess carpal tunnel syndrome. However, it is unclear which wrist position during this test best isolates median nerve function. This study will measure thenar muscle activation and median nerve conduction in 30 healthy participants performing the Phalen's test. Different wrist flexion angles will be evaluated to determine which position optimally targets the median nerve. Results may enhance utilization of the Phalen's test in clinical practice and research.

Study Timeline

• Status Verified: 2023-07
• Study First Submitted: 2023-07-20
• Study First Submitted QC: 2023-07-20
• Last Update Submitted: 2023-07-20
• Study Start: 2023-07-25
• Study First Posted: 2023-07-28
• Last Update Posted: 2023-07-28
• Primary Completion: 2023-11-25
• Study Completion: 2023-12-15

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 30

Inclusion Criteria

• Healthy adults aged 18-45 years
• No history of hand/wrist disorders

Exclusion Criteria

• Contraindications to EMG or NCV
• Neurological or muscular disorders

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Healthy Adults	Phalen's wrist flexion test	30 healthy adult participants aged 18-45 years performing the Phalen's wrist flexion test

Primary Outcome Measures

Name	Time	Method
Median Nerve Conduction Velocity during Phalen's Test	Baseline	Median nerve conduction velocity (measured in meters per second, m/s) assessed using surface electrodes at the wrist and elbow during the Phalen's test wrist flexion maneuver. Measured bilaterally at each wrist flexion angle during a single study visit.
Median Nerve Distal Latency during Phalen's Test	Baseline	Median nerve distal latency (measured in milliseconds, ms) assessed using surface electrodes over the abductor pollicis brevis and stimulating the median nerve at the wrist during the Phalen's test. Measured bilaterally at each wrist flexion angle during a single study visit.
Thenar Muscle Activation	Baseline	Mean EMG activity of the thenar muscles during the Phalen's test at different wrist angles. Measured in microvolts (μV).

Trial Locations

Locations (1)

Outpatient clinic of faculty of physical therapy, Ahram Canadian University; 🇪🇬 Al Ḩayy Ath Thāmin, Giza, Egypt