Rajendiran Subashini, Rajappa Srinivasan, Jaichandran Sandhiya, Bhat Anil, Thatte Mukund
Department of Hand Surgery, Sri Ramachandra Institute of Higher Education and Research, Porur, Chennai, Tamil Nadu, India.
Department of Hand Surgery, Kasturba Medical College, Manipal, Karnataka, India.
Indian J Plast Surg. 2024 Aug 16;57(4):324-328. doi: 10.1055/s-0044-1788932. eCollection 2024 Aug.
The absence of the palmaris longus (PL) varies with race. The presence of a functional flexor digitorum superficialis (FDS) of the little finger also varies widely. The aim of this study is to determine the prevalence of the absence of the PL and functional FDS of the little finger in the Indian population. This is a prospective observational study conducted as a part of the Indian normative data project of the Indian Society for Surgery of the Hand. The presence of the PL was assessed by Schaeffer's test. The function of the FDS was assessed by the standard test and modified test and its function designated as absent, present independently, or present combinedly with the ring finger FDS. A total of 200 volunteers including 84 males and 116 females in the 21- to 60-year age group were examined. Of the 400 hands examined, the PL was absent in 26 upper limbs (6.5%). The PL was absent unilaterally in 12 individuals (6%) and bilaterally in 7 individuals (3.5%). Of the 400 little fingers examined, FDS function was absent in 72 fingers (18%), while 67 fingers (16.75%) had a common function and 261 fingers (65.25%) had an independent function. Only 2% had a bilateral absence of both the PL and functional FDS tendons and 5% had a unilateral absence of both tendons. The PL and FDS of the little finger were more absent in the right side than in the left side, but the difference was not statistically significant. There was no significant association between the absence of the PL and the absence of the functional FDS of the little finger.
掌长肌（PL）缺如情况因种族而异。小指的功能性指浅屈肌（FDS）的存在情况也有很大差异。本研究的目的是确定印度人群中PL缺如及小指功能性FDS缺如的发生率。
这是一项前瞻性观察性研究，作为印度手外科学会印度标准数据项目的一部分进行。通过谢弗试验评估PL的存在情况。通过标准试验和改良试验评估FDS的功能，并将其功能指定为缺如、独立存在或与环指FDS共同存在。
共检查了200名年龄在21至60岁之间的志愿者，其中包括84名男性和116名女性。在检查的400只手中，26条上肢（6.5%）PL缺如。12人（6%）为单侧PL缺如，7人（3.5%）为双侧PL缺如。在检查的400根小指中，72根手指（18%）FDS功能缺如，67根手指（16.75%）有共同功能，261根手指（65.25%）有独立功能。只有2%的人双侧PL和功能性FDS肌腱均缺如，5%的人单侧两根肌腱均缺如。
小指的PL和FDS在右侧比左侧更易缺如，但差异无统计学意义。PL缺如与小指功能性FDS缺如之间无显著关联。
