Smartphone Addiction on the Biomechanical Properties of Thumb Muscles and Thumb Sensory Sensitivity

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

36 participants

Study Classification

OBSERVATIONAL

Study Start Date

2025-07-01

Study Completion Date

2026-07-01

Brief Summary

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This study will aim to assess the effects of smartphone addiction on thumb muscle biomechanics and sensory sensitivity among university students. The research will investigate whether excessive smartphone use leads to significant differences in muscle tone, stiffness, elasticity, and sensory discrimination capabilities.

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Detailed Description

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This will be a prospective, non-randomized, controlled observational study designed to examine the impact of smartphone addiction on the neuromuscular and sensory function of the thumbs. A total of 36 university students aged 18 to 30 will be recruited and categorized into two groups based on their scores from the Smartphone Addiction Scale - Short Version (SAS-SV): addicted and non-addicted.

Participants' weekly screen times will be recorded, and the smartphone applications used will be categorized. The MyotonPro™ device will be used to measure the biomechanical properties of three thumb muscles (abductor pollicis brevis, flexor pollicis brevis, and opponens pollicis) in both hands. Sensory function will be assessed bilaterally using the Baseline Aesthesiometer via two-point discrimination testing.

This study will evaluate whether significant biomechanical or sensory changes are observable among addicted users compared to non-addicted users, and whether screen time is correlated with any muscular or sensory outcomes.

Conditions

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Smartphone Addiction Thumb Injury

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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Smartphone-Addicted Group

This group will consist of university students who will be identified as addicted to smartphones based on their scores on the Smartphone Addiction Scale - Short Version (SAS-SV). Participants scoring above the cut-off threshold will be assigned to this group. Weekly screen time will also be recorded.

Thumb evaluations

Intervention Type DIAGNOSTIC_TEST

There is no therapeutic or experimental intervention in this study. All procedures will be limited to diagnostic evaluations. The study will include non-invasive biomechanical and sensory assessments to compare the thumb muscle characteristics and sensory discrimination between smartphone-addicted and non-addicted university students.

Specifically, muscle tone, stiffness, and elasticity will be measured using the MyotonPro™ device, and thumb sensory sensitivity will be evaluated using a Baseline Aesthesiometer with a two-point discrimination test. These assessments will be conducted during a single laboratory visit and will not involve any treatment, medication, or behavioral intervention.

This is a purely observational study aimed at identifying potential associations between smartphone usage patterns and thumb neuromuscular or sensory changes.

Non-Addicted Control Group

This group will consist of university students who will be identified as not addicted to smartphones based on their SAS-SV scores, scoring below the determined cut-off point. Weekly screen time will also be recorded.

Thumb evaluations

Intervention Type DIAGNOSTIC_TEST

There is no therapeutic or experimental intervention in this study. All procedures will be limited to diagnostic evaluations. The study will include non-invasive biomechanical and sensory assessments to compare the thumb muscle characteristics and sensory discrimination between smartphone-addicted and non-addicted university students.

Specifically, muscle tone, stiffness, and elasticity will be measured using the MyotonPro™ device, and thumb sensory sensitivity will be evaluated using a Baseline Aesthesiometer with a two-point discrimination test. These assessments will be conducted during a single laboratory visit and will not involve any treatment, medication, or behavioral intervention.

This is a purely observational study aimed at identifying potential associations between smartphone usage patterns and thumb neuromuscular or sensory changes.

Interventions

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Thumb evaluations

There is no therapeutic or experimental intervention in this study. All procedures will be limited to diagnostic evaluations. The study will include non-invasive biomechanical and sensory assessments to compare the thumb muscle characteristics and sensory discrimination between smartphone-addicted and non-addicted university students.

Specifically, muscle tone, stiffness, and elasticity will be measured using the MyotonPro™ device, and thumb sensory sensitivity will be evaluated using a Baseline Aesthesiometer with a two-point discrimination test. These assessments will be conducted during a single laboratory visit and will not involve any treatment, medication, or behavioral intervention.

This is a purely observational study aimed at identifying potential associations between smartphone usage patterns and thumb neuromuscular or sensory changes.

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

* Aged 18-30 years
* Currently enrolled university students
* Regular smartphone users

Exclusion Criteria

* Presence of systemic, chronic, or neuromuscular disorders
* History of upper limb surgery or trauma
* Neurological or orthopedic conditions affecting upper extremities
* Subcutaneous fat over target muscles \>20 mm
* Presence of wounds or burns on the measurement area

Minimum Eligible Age

18 Years

Maximum Eligible Age

30 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No