Hand Dominance in Fibromyalgia
Condition: Fibromyalgia
MeSH terms: Fibromyalgia; Myofascial Pain Syndromes
Study type: Observational

Summary: 
      Evaluating laterality changes in different psychiatric and neurodevelopmental diseases has
      recently been one of the popular perspectives of laterality studies. There are studies
      reporting changes in functional and structural hemispheric asymmetries in some
      neurodevelopmental and psychiatric diseases, and thus relations with atypical lateralization
      patterns or handedness. There is no study in the literature evaluating brain lateralization
      or handedness in fibromyalgia. The aim of our study is to evaluate the relationship between
      handedness, which is an indicator of brain lateralization, and fibromyalgia disease severity
      and functional outcomes related to fibromyalgia in patients with fibromyalgia. This
      cross-sectional study included 40 fibromyalgia patients aged 20-50 years, meeting the
      American College of Rheumatology 2016 Fibromyalgia Diagnostic Criteria, and 40 healthy
      volunteers in the same age range as the control group. Information about the age, gender,
      height, weight, and comorbidities of the participants included in the study were recorded. In
      addition, information about the duration of fibromyalgia diagnosis and pharmacological and
      non-pharmacological treatments for fibromyalgia were also recorded in the patient group.

      Handgrip strengths with Jamar-type hand dynamometer, tip pinch strengths with pinch meter,
      and hand dexterities with the Nine-Hole Peg Test were evaluated for both hands of all
      participants. The Edinburgh Handedness Inventory, Beck Depression Inventory, and Beck Anxiety
      Inventory were administered to all participants. In addition, the American College of
      Rheumatology 2016 Fibromyalgia Diagnostic Criteria was questioned in the patient group, and
      the Revised Fibromyalgia Impact Questionnaire was applied.
    


Intervention name(s): Handgrip strengths measurements with Jamar-type hand dynamometer and, tip pinch strengths measurements with pinchmeter; The Nine Hole Peg Test
Intervention type(s): Other; Other
Intervention description(s): The handgrip strength and tip pinch strength of the participants were measured using the Jamar-type hand dynamometer and pinch meter available in our clinic. The handgrip strengths were measured with shoulders in adduction and neutral rotation, elbows in 90 degrees flexion, and forearms and wrists in a neutral position, while the tip pinch strengths were measured by squeezing a pinch meter between the thumb and index finger. Participants took a deep breath and then applied gripping force with maximal force while exhaling. In the analysis, the average of the three measurements made with an interval of five minutes was taken as the basis for the analysis.; This test was used to evaluate the hand dexterity of the participants. This test consists of a square area and nine holes in this area, nine cylinders suitable for these holes, and a storage box. Participants quickly took the nine cylinders from the storage box and placed them in the holes, and after placing all the cylinders, they put the cylinders back in the storage box one by one. In the evaluation of the test, the time elapsed during these operations was measured in seconds with a chronometer, and shorter times were considered to indicate better hand dexterity.
Observational model: Case-Control
Time perspective: Cross-Sectional
Sampling method: Probability Sample
Study population: 
        This cross-sectional study included 40 fibromyalgia patients aged 20-50 years, meeting the
        American College of Rheumatology (ACR) 2016 Fibromyalgia Diagnostic Criteria, and 40
        healthy volunteers in the same age range as the control group.