Karahan, Ali YavuzBakdik, SuleymanOzen, Kemal EmreArslan, SerdarKarpuz, SavasYilmaz, NihalYildirim, Pelin2024-02-232024-02-2320170959-30201878-5913https://doi.org/10.3233/IES-171139https://hdl.handle.net/20.500.12452/15730BACKGROUND: The palmaris longus (PLM) is a fusiform-shaped muscle that appears in the superficial flexor compartment of the forearm. It has been suggested that PLM is a phylogenetically degenerate metacarpophalangeal joint flexor. OBJECTIVE: The aim of this study was to compare the strength of wrist flexion and extension in healthy volunteers with and without the PLM. METHODS: Sixty-four healthy subjects, 30 men and 34 women, 18-22 years old were enrolled in this study. The database consisted of 128 wrist tests. The inclusion criteria were as follows: sedentary lifestyle, unknown musculoskeletal disorders and right-handedness. Musculoskeletal ultrasound imaging was used for assessing the presence of PLM. A hand-held digital dynamometer was used to assess the peak force of wrist extension and flexion. Data were analyzed separately for women and men RESULTS: The existence of right-sided PLM was 73.3% in male subjects and 55.9% in female subjects. For men, the strength of wrist flexion was 36.03 +/- 13.92 N and 34.24 +/- 12.23 N for the right and left side, respectively. For women, the respective strengths were 16.20 +/- 7.29 N and 15.26 +/- 6.79 N. For both sexes, there was no statistically significant difference between those with and without a PLM (p > 0.05). There was also no significant difference in the agonist/antagonist (flexion/extension) ratio of the wrist between those with and without a PLM in both sexes and sides. CONCLUSIONS: The existence or absence of PLM plays no role in the strength of either the flexors or extensors of the wrist.eninfo:eu-repo/semantics/closedAccessPalmaris Longus MuscleStrengthWristUltrasoundDynamometerAgonist AntagonistArticle2542432472-s2.0-85039148688Q3WOS:000418070500003Q410.3233/IES-171139