JOURNAL ARTICLE

Masseter muscle hyperactivity and pain sensitization during smartphone use: A cross-sectional study of thenar–trigeminal interaction.

  • Published In: Journal of Back & Musculoskeletal Rehabilitation, 2025, v. 38, n. 6. P. 1522 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Celık Guzel, Hazel; Kecelıoglu, Sule; Kaya Mutlu, Ebru; Durukan, Mert; Satı Kırkan, Tulay 3 of 3

Abstract

This article investigates the effects of repetitive thumb movements during smartphone use (SU) on the masseter muscle through thenar muscle activity in university students. Using pressure pain threshold measurements and electromyography (EMG), the study found that five minutes of thumb tapping significantly decreased pressure pain thresholds in the thenar and masseter muscles and increased masseter muscle activation, particularly on the dominant (right) side. The findings suggest that repetitive thumb movements may induce central sensitization within the trigeminal system, potentially linking SU to increased risk of temporomandibular dysfunction (TMD) and bruxism. The study highlights a functional thenar-masseter relationship that could inform future therapeutic approaches targeting orofacial musculoskeletal disorders associated with modern smartphone use.

Additional Information

  • Source:Journal of Back & Musculoskeletal Rehabilitation. 2025/11, Vol. 38, Issue 6, p1522
  • Document Type:Article
  • Subject Area:Psychology
  • Publication Date:2025
  • ISSN:1053-8127
  • DOI:10.1177/10538127251360869
  • Accession Number:188807013
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