what is the muscle between your thumb and pointer finger

These muscles originate near the elbow, run through the forearm’s back, and insert onto the proximal phalanx. The muscles that control finger extension are called the extensor digitorum communialis. Extension happens when releasing an item from your grasp, pointing a finger, or pushing up from a flat surface. What is Finger Extension?įinger extension occurs when you straighten out your hand. Here are the muscles of your hand and wrist. They originate from the flexor digitorum profundus and attach to the extensor hood. The lumbricals control the proximal phalanx’s flexion and are the only muscles in the body that do not attach to the bone. These long flexors originate near the elbow and run through the forearm. Each finger has two muscles involved in flexion flexor digitorum profundus, which attaches to the distal phalanx, and flexor digitorum superficialis, which attaches to the middle phalanx. Flexion is the strongest movement that the fingers perform and is used during grasp and pinch. What is Finger Flexion?įinger flexion is what happens when you make a fist. The closest set of knuckles are known as the metacarpal phalangeal joints (MCP), and then moving distally are the proximal interphalangeal joint (PIP) and the distal interphalangeal joint (DIP). The thumb has just two bones, the proximal and distal phalanx. Each finger comprises three bones known as the proximal, middle, and distal phalanges (starting at the hand and moving outward).

What is the muscle between your thumb and pointer finger