The brachioradialis runs from the lower, front part of the upper arm, across the elbow to the middle of the forearm. It flexes the forearm at the elbow. It is also capable of both pronation and supination, depending on the position of the forearm. Brachioradialis trigger points do not happen in isolation and are part of a pattern that includes the hand extensors and arm flexors.
Pain from brachioradialis trigger points often originates on the outside of the forearm, near the elbow, and then progresses down the arm toward the base and web of the thumb.
Brachialis trigger points are typically activated from a repetitive, forceful handgrip. This can include activities as diverse as weeding, excessive handshaking ironing, or throwing a frisbee for a long time. Once initial soreness develops, the tendency to “test” the muscle for improvement tends to worsen it.
The functional unit of the brachioradialis includes the biceps and brachialis, but its dysfunction typically develops in conjunction with trigger points in the hand extensors and the supinator muscle. Corrective actions include trigger point pressure release, stretching, and avoiding activities that overload the muscle.