Lumbrical

Definition

Lumbricals are small, worm-like muscles located in the hand and foot, primarily involved in flexing the metacarpophalangeal joints and extending the interphalangeal joints of the fingers. They play a pivotal role in fine motor control and the dexterous movements required for tasks such as typing or playing musical instruments.

Related terms

Metacarpophalangeal joints: These are flexible joints between the metacarpal bones of the hand and the proximal bones of the fingers, allowing for bending and straightening motions.

Interphalangeal joints: Hinge joints located between phalanx bones in fingers and toes, enabling bending and extension movements.

Fine motor skills: The coordination of small muscles, like those of the hands and fingers, with the eyes, enabling activities such as writing, grasping small objects, and fastening clothing