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Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Until recently, it was commonly held that the morphologic differences between male and female brains arise due to secretion of sex-specific gonadal hormones during fetal development. However, recent studies have shown that there are sex differences in genetic expression before the development of sex gonads.
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Sex-Differences in the Brain and Motor Control

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Sex-Differences in the Brain and Motor Control | Pediatric Research

Age and sex affect the neuromuscular system including performance fatigability. Data on performance fatigability and underlying mechanisms in hand muscles are scarce. Therefore, we determined the effects of age and sex on force decline, and the mechanisms contributing to force decline, during a sustained isometric maximal voluntary contraction MVC with the index finger abductor first dorsal interosseous, FDI. Abduction force and root mean squared electromyographic activity rms-EMG were recorded in both hands. Double-pulse stimulation was applied to the ulnar nerve during superimposed twitch and after doublet-force the brief and sustained MVCs. Age did not affect MVC, force decline and superimposed twitch.
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Metrics details. Musculoskeletal disorders are more prevalent among women than among men, which may be explained by aspects of motor control, including neuromuscular requirements and motor variability. Using an exploratory approach, this study aimed to evaluate sex differences in neuromuscular responses and motor variability during a repetitive task performed on 3 days. Thirty women and 27 men performed the non-fatiguing, repetitive, 1-h screwing task. For neuromuscular responses, the mean and difference values of static, median, and peak percentile muscle activity levels normalized to a reference voluntary contraction force and, for motor variability, the mean and difference values of relative and absolute cycle-to-cycle variability across days were compared between both sexes for each muscle.
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