Nerve Growth Factor-Induced Sensitization of the Sternocleidomastoid Muscle and Its Effects on Trigeminal Muscle Sensitivity and Pain Profiles: A Randomized Double-Blind Controlled Study

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

DOI

  • Fernanda Pereira de Caxias, University of São Paulo
  • ,
  • Fernando Gustavo Exposto
  • Karina Helga Leal Turcio, Scandinavian Center for Orofacial Neurosciences (SCON), Stockholm, Sweden.
  • ,
  • Daniela Micheline Dos Santos, Karolinska Institutet
  • ,
  • Peter Svensson

AIMS: To investigate whether localized sensitization of the sternocleidomastoid (SCM) muscle using nerve growth factor (NGF) would affect masseter and anterior temporalis muscle sensitivity and pain profiles.

METHODS: A total of 28 healthy participants attended two sessions (T0 and T1). At T0, the maximum voluntary occlusal bite force (MVOBF), as well as pressure pain thresholds (PPT), mechanical sensitivity, and referred pain/sensations for the SCM, masseter, and temporalis muscles, were assessed. Participants also completed the Pain Catastrophizing Scale (PCS), the Pain Vigilance and Awareness Questionnaire (PVAQ), and the Neck Disability Index (NDI). After these assessments, 14 participants received an injection of NGF into the SCM, and 14 received an injection of isotonic saline solution. At T1 (48 hours postinjection), the participants were again submitted to the same evaluations.

RESULTS: NGF caused significant mechanical sensitization in the SCM (P < .025), but not in the masseter or temporalis muscles (P > .208). It also caused significant increases in NDI score (P = .004). No statistically significant differences were found for MVOBF, frequency of referred pain/sensations, or questionnaire scores (P > .248).

CONCLUSION: These results suggest that 48 hours after localized sensitization of the SCM, the primary response is impairment of neck function, but not jaw function.

Original languageEnglish
JournalJournal of Oral & Facial Pain and Headache
Volume35
Issue1
Pages (from-to)7-16
Number of pages10
ISSN1064-6655
DOIs
Publication statusPublished - 18 Mar 2021

    Research areas

  • Bite Force, Electromyography, Humans, Masseter Muscle, Nerve Growth Factor, Pain Threshold, Temporal Muscle

See relations at Aarhus University Citationformats

ID: 213629244