ArticleJournal of athletic training2024
Thin and Plain Supplementary Motor Area in Chronic Ankle Instability: A Volume- and Surface-Based Morphometric Study.
Article in Journal of athletic training, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors at 3 institutions in 1 country.
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Abstract
contextThe supplementary motor area (SMA) is involved in the functional deficits of chronic ankle instability (CAI), but the structural basis of its abnormalities remains unclear.
objectivesTo determine the differences in volume- and surface-based morphologic features of the SMA between patients with CAI and healthy controls and the relationship between these features and the clinical features of CAI.
designCross-sectional study.
settingSports medicine laboratory. PATIENTS OR OTHER
participantsA total of 32 patients with CAI (10 women, 22 men; age = 32.46 ± 7.51 years) and 31 healthy controls (12 women, 19 men; age = 29.70 ± 8.07 years) participated. MAIN OUTCOME MEASURE(S): We performed T1-weighted structural magnetic resonance imaging of participants and calculated volume- and surface-based morphologic features of SMA subregions. These subregions included anterior and posterior subdivisions of the medial portion of Brodmann area 6 (6 ma and 6 mp, respectively) and supplementary and cingulate eye fields. Between-group comparisons and correlation analysis with clinical features of CAI were performed.
resultsModerately thinner 6 mp (motor-output site; Cohen d = -0.61; 95% CI = -1.11, -0.10; P = .02) and moderately plainer 6 ma (motor-planning site; Cohen d = -0.70; 95% CI = -1.20, -0.19; P = .01) were observed in the CAI than the control group. A thinner 6 mp was correlated with lower Foot and Ankle Ability Measure Activities of Daily Living subscale scores before (r = 0.400, P = .02) and after (r = 0.449, P = .01) controlling for covariates.
conclusionsPatients with CAI had a thinner 6 mp and a plainer 6 ma in the SMA compared with controls. The thin motor-output site of the SMA was associated with ankle dysfunction in patients. This morphologic evidence of maladaptive neuroplasticity in the SMA might promote more targeted rehabilitation of CAI.
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