title: An additional muscle belly of the first lumbrical muscle.
abstract: BACKGROUND
  Lumbrical muscles play a vital role in the precision movements of the hand, along with the thenar, hypothenar and interossei muscles. The variation in the lumbrical muscle is clinically significant.
  
  
  METHODS
  During routine dissection of an adult male cadaver, we observed an additional muscle belly of the first lumbrical muscle took origin from the tendon of the flexor digitorum superficialis (FDS) to the index finger, close to the proximal margin of the flexor retinaculum.
  
  
  CONCLUSIONS
  The presence of such an additional muscle in the carpal tunnel should be considered in the aetiology of carpal tunnel syndrome (CTS).
authors: Department of Anatomy, Centre for Basic Sciences, Kasturba Medical College, Bejai, Mangalore, Karnataka, 575004, India. ranjanbhatana@gmail.com.
authors: Soubhagya R
authors: SR
authors: Nayak
authors: Ramya
authors: R
authors: Rathan
authors: Rachana
authors: R
authors: Chauhan
authors: Ashwin
authors: A
authors: Krishnamurthy
authors: Latha V
authors: LV
authors: Prabhu