Trigger Points: An Anatomical Substratum

Figure 2

Gross anatomy image corresponding to the previous scheme. Dissection of the trapezius muscle and the areas corresponding to the clinical trigger points. Reflection of the right trapezius muscle showing the entry points of the spinal accessory nerve branches that coincide with the MTrPs 1, 2, 3, 3.1, 5, 5.1, and 5.2. Trapezius muscle, levator scapulae, rhomboid major, and rhomboid minor are identified.