Depression and Resting Masticatory Muscle Activity

Area of Science:

• Neurology
• Psychology
• Dentistry

Background:

• Investigating the link between mental health and physical function is crucial.
• The Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMDs) Axis II is a tool used to assess psychological factors.
• Understanding the impact of depression on masticatory muscles is important for overall health.

Purpose of the Study:

• To determine if moderate depression influences the resting bioelectrical activity of temporal and masseter muscles.
• To examine the relationship between psychological status and muscle function in healthy adults.

Main Methods:

• 68 healthy adult women were recruited, with 46 meeting inclusion criteria.
• Participants were divided into a moderate depression group (23) and a control group (23) based on RDC/TMDs Axis II.
• Electromyography (BioEMGIII) assessed resting muscle activity; Shapiro-Wilk and Mann-Whitney U tests were used for analysis.

Main Results:

• The group with moderate depression exhibited higher mean tensions in temporal and masseter muscles.
• These differences in muscle tension were not statistically significant (p > 0.05).

Conclusions:

• Moderate depression, as assessed by RDC/TMDs II, is not significantly related to the resting activity of masticatory muscles.
• Larger studies are needed to further investigate the connection between psychological factors and the bioelectrical activity of masticatory muscles.