EMG-Assessed Paratonia: A New Approach to Response Inhibition

University of Genoa (UniGe)

Status: Completed

Conditions: Healthy

Treatments: Diagnostic Test: EMG-based assessment of paratonia

Study type: Interventional

Funder types: Other

Identifiers

NCT06573918

EMG-DINOGMI-2024

Details and patient eligibility

About

Paratonia is the inability to relax muscles during the assessment of muscle tone in the absence of spasticity and parkinsonian rigidity. It can be evaluated qualitatively using clinical scales and objectively through surface electromyography (EMG-assessed paratonia). It is widely accepted that paratonia represents a manifestation of impaired motor response inhibition due to frontal lobe dysfunction.

Traditionally, motor response inhibition has been assessed using experimental protocols such as go/no-go and stop-signal tasks. Research has shown that athletes, particularly those engaged in open-skill sports, demonstrate superior motor response inhibition compared to sedentary individuals. Even amateur athletes exhibit better motor response inhibition than sedentary individuals, though to a lesser extent than professional athletes.

Given that the etiology of paratonia involves a defect in motor response inhibition, it is hypothesized that EMG-assessed paratonia could become a novel approach for evaluating motor response inhibition. The present study was designed to validate this hypothesis. Specifically, we first tested whether EMG-assessed paratonia in healthy subjects can reveal a well-known aspect of motor response inhibition, namely its correlation with the level of physical activity.

Full description

EMG-assessed paratonia was analyzed and compared to assess motor response efficiency in three groups of healthy young adults with different levels of physical activity: professional athletes engaged in closed and open skills sports, amateurs, and sedentary individuals. To analyze EMG-assessed paratonia, two surface electrodes were attached to the biceps and triceps brachii muscles during passive flexion-extension movements of the elbow while the participant remained in a state of maximum relaxation. Any EMG activity detected during these movements was attributed to an inability to relax, thereby reflecting their degree of paratonia.

Enrollment: 120 patients

Sex: All

Ages: 18 to 30 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

Sedentary Individuals: Defined as those engaging in less than 16.67 metabolic equivalent of task (MET) hours per week.

Amateur Athletes: Defined as individuals who engage in 16.67 to 25 MET hours per week.

Professional Athletes: Defined as individuals who engage in more than 25 MET hours per week.

Exclusion criteria

Presence of any pathology or pain in the flexor or extensor muscles of the arm. Use of muscle stimulants, relaxants, steroids, tobacco, alcohol, or any other drugs.

Trial design

Primary purpose: Other

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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120 participants in 1 patient group

EMG-assessed paratonia group

Experimental group

Description:

The study evaluated EMG-assessed paratonia to measure motor response efficiency across three groups of healthy young adults with varying physical activity levels: professional athletes (in both open and closed skills sports), amateurs, and sedentary individuals. Surface electrodes were placed on the biceps and triceps brachii muscles during passive elbow movements while participants remained relaxed. EMG activity detected during these movements was used to quantify the level of paratonia, indicating the participants' ability to relax their muscles.

Treatment:

Diagnostic Test: EMG-based assessment of paratonia