Al Risi Abdul-Malik, Al Busaidi Sara, Al Aufi Hamood, Al Hashmi Lubna, Sirasanagandla Srinivasa Rao, Das Srijit
Department of Human & Clinical Anatomy, College of Medicine & Health Sciences, Sultan Qaboos University, Al Khoud, Muscat 123, Oman.
Diagnostics (Basel). 2025 Jan 27;15(3):304. doi: 10.3390/diagnostics15030304.
The palmaris longus (PL) is a long, thin muscle in the forearm's flexor compartment, known for its variations. The present study aimed to study the PL muscle in Omani medical students and its correlation with grip strength. A cross-sectional prospective study was conducted among 240 medical students (120 males, 120 females) at Sultan Qaboos University, comprising 480 upper limbs. Participants were between 18 and 25 years old and had no history of forearm surgery. We considered 480 upper limbs irrespective of left or right side, and our main aim was to compare the grip strength according to the presence or absence of PL. We assessed the presence of the PL muscle using Schaeffer's Test and Pushpakumar's test and measured the grip strength using the CAMRY digital hand dynamometer. The data were analyzed using descriptive statistics, Chi-square tests, and independent -tests. The PL was present in 92.50% of the subjects (irrespective of side), with a higher prevalence in the females. The PL was absent in 24 (10.00%) males and 12 (5.00%) females, respectively. Average grip strength was 21.4 ± 5.25 kg in females and 40.92 ± 7.79 kg in males without considering PL presence or absence. If PL was present, then the mean grip strength was 30.84 ± 11.71 kg, and if the PL was absent, then the mean grip strength was 35.05 ± 12.44 kg. However, the -value did not show any significant differences ( = 0.057). : The PL is highly prevalent, especially in females, and its absence does not significantly affect grip strength. Hence, PL may be used for successful reconstructive surgeries without affecting hand function.
掌长肌（PL）是位于前臂屈肌间隙的一块细长肌肉，以其变异情况而闻名。本研究旨在对阿曼医学生的掌长肌进行研究，并探讨其与握力的相关性。在苏丹卡布斯大学对240名医学生（120名男性，120名女性）进行了一项横断面前瞻性研究，共涉及480条上肢。参与者年龄在18至25岁之间，无前臂手术史。我们将480条上肢纳入研究，无论其为左侧还是右侧，主要目的是根据掌长肌的有无比较握力。我们使用谢弗氏试验和普什帕库马尔氏试验评估掌长肌的存在情况，并使用康瑞数字式握力计测量握力。数据采用描述性统计、卡方检验和独立样本t检验进行分析。92.50%的受试者（无论哪一侧）存在掌长肌，女性的患病率更高。分别有24名（10.00%）男性和12名（5.00%）女性不存在掌长肌。不考虑掌长肌的有无，女性的平均握力为21.4±5.25千克，男性为40.92±7.79千克。如果存在掌长肌，平均握力为30.84±11.71千克；如果不存在掌长肌，平均握力为35.05±12.44千克。然而，p值未显示出任何显著差异（p = 0.057）。结论：掌长肌高度普遍存在，尤其是在女性中，其缺失对握力没有显著影响。因此，掌长肌可用于成功的重建手术而不影响手部功能。
