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Table 1 The number of key active MTPs in fibromyalgia (N = 30)

From: Reproduction of overall spontaneous pain pattern by manual stimulation of active myofascial trigger points in fibromyalgia patients

Muscles Left side Right side Subtotal
Subocciput 4 5 9
Temporalis (TrP3) 1 1 2
Upper trapezius (TrP2) 20 21 41
Supraspinatus (mid) ) 15 14 30
Infraspinatus (mid) 12 13 25
Pectoris major (mid) 5 7 12
Posterior deltoid (mid) 6 8 14
Extensor digitorum (2 cm distal to lateral epicondyle) 22 23 43
Rhomboid major (mid) 2 3 5
Triceps (mid) 2 3 5
Biceps (mid) 2 2 4
Quadratus lumborum (tip of 3rd transverse process) 20 23 43
Gluteus medius (mid) 12 13 25
Vastus medialis (TrP1) 9 8 18
Rectus femoris (proximal attachment) 4 5 9
Tibialis anterior (proximal attachment) 2 3 5
Peroneous longus (mid) 2 2 4
Rectus abdominis (2 cm lateral to umbilicus) 1 1 2
Gastrocnemius (TrP1,2) 2 2 4
Plantar muscles (mid) 2 3 5
Subtotal 146 159 305
  1. MTPs, myofascial trigger points confirmed by intramuscular EMG examination.
  2. The italicized texts in the brackets indicate the actual locations of key MTPs. Mid, mid portion of the muscle. TrP1 or TrP2 or TrP3: trigger point locations defined in Travell and Simons book: Myofascial Pain and Dysfunction the Trigger Point Manual [11].