In vivo evidence of lumbricals incursion into the carpal tunnel in healthy hands: An ultrasonographic cross sectional study

Named after the Latin word “lumbricus” meaning earthworm, the lumbricals are 4 thin and elongated intrinsic muscles that originate from the palm area of the tendons of Flexor Digitorum Profundus (FDP) on the volar side of digits 2-5, and extend radially to insert into the lateral band of the extensor hood mechanism at the base of the proximal phalanx.1 This makes the lumbricals unique in their position as both of their attachments are mobile and do not attach to bone.
Source: Journal of Hand Therapy - Category: Rehabilitation Authors: Source Type: research