Median and Ulnar Nerve Function in Tattoo Artists

This observational cross-sectional case-control study evaluates neurosensory and motor function differences between professional tattoo artists exposed to long-term occupational vibration and healthy controls. Chronic exposure to hand-arm vibration (HAV) has been associated with peripheral neuropathy, entrapment neuropathies, and sensory receptor dysfunction.

Participants will undergo standardized assessment including:

Tinel, Phalen, reverse Phalen, and elbow flexion tests

Semmes-Weinstein monofilament testing

Two-point discrimination

Vibration perception testing (30 Hz and 256 Hz)

Grip and pinch strength measurements

Brief Michigan Hand Outcomes Questionnaire

Boston Carpal Tunnel Questionnaire

The study aims to determine whether occupational vibration exposure is associated with measurable alterations in median and ulnar nerve sensory and motor function.

Inclusion criteria

• Age ≥ 18 years
• Professional tattoo artists with at least 1 year of occupational experience (case group)
• Healthy individuals without occupational vibration exposure (control group)
• Voluntary participation and provision of informed consent
• No upper extremity trauma or surgery within the last 6 months

Exclusion criteria

• Diagnosis of diabetes mellitus
• Diagnosis of peripheral neuropathy
• History of cervical radiculopathy or cervical disc herniation
• History of upper extremity surgery or injury
• Presence of rheumatologic or systemic inflammatory diseases
• Pregnancy
• Substance or alcohol abuse
• Engagement in a second occupation involving repetitive hand use or vibration exposure