Central and Attachment Trigger Points

Central Trigger Points

Central TrPs are in the middle portion of the muscle belly, near the center of muscle fibers. They are strongly associated with dysfunctional endplates, contain many electrically active points, and many contraction knots.

Central Trigger Points can be found near midfiber (not necessarily in the middle of a muscle) in various portions of the muscle.

Attachment Trigger Points

Trigger Points which are in a region of muscle attachment (at the musculotendinous junction or/and at the osseous attachment of the muscle) are called attachment trigger points. They are believed to be caused by unrelieved tension of the taut band that is associated with a central TrP.