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Muscles of the fingers can be subdivided into extrinsic and intrinsic muscles. The extrinsic muscles are the long flexors and extensors. They are called extrinsic because the muscle belly is located on the forearm. The fingers have two long flexors, located on the underside of the forearm. They insert by tendons to the phalanges of the fingers.
Mallet finger. Pain or tenderness in your palm at the base of your finger, stiffness, clicking when you move your finger. Trigger finger. Ache, numbness, tingling or weakness in your fingers or hands. Carpal tunnel syndrome. Sudden, sharp pain, swelling, a popping or snapping sound during the injury. Broken finger.
