Lumbrical Muscles

The Lumbrical Muscles are a group of small, intrinsic hand muscles located in the palm. There are four lumbricals in each hand, corresponding to each finger. Originating from the tendons of the flexor digitorum profundus (FDP), these muscles pass distally to insert into the extensor hoods of the fingers. Their primary function is to flex the metacarpophalangeal (MCP) joints and extend the interphalangeal (IP) joints of the fingers, enabling precise movements crucial for activities like gripping and fine motor control. Innervated by the median and ulnar nerves, the lumbricals play a key role in hand dexterity. Injuries or dysfunctions affecting these muscles can impact hand function, emphasizing their significance in orthopaedics and rehabilitation. Understanding the anatomy and function of lumbrical muscles is crucial in the fields of orthopaedics, hand surgery, and rehabilitation. Therapeutic interventions and exercises targeting these muscles are employed to restore hand function after injuries or surgeries and to address conditions affecting hand dexterity.