_{54. Greenman PE: Principles of Manual Medicine. Ed. 2. Williams & Wilkins, Baltimore, 1996 (pp. 26, 316).}

_{55. Gunn CC, Milbrandt WE: Tenderness at motor points. J Bone Joint Surg 58A:815–825, 1976.}

_{56. Gunn CC, Milbrandt WE: Early and subtle signs in low-back sprain. Spine 3:267–281, 1978.}

_{57. Gutstein M: Diagnosis and treatment of muscular rheumatism. Br J Phys Med 1:302–321, 1938.}

_{58. Harman JB, Young RH: Muscle lesions simulating visceral disease. Lancet 1:1111–1113, 1940.}

_{59. Hench PK: Nonarticular rheumatism. In: Rheumatic Diseases: Diagnosis and Management. Edited by Katz WA. J. B. Lippincott, Philadelphia, 1977 (p. 624).}

_{60. Hirschberg GG, Froetscher L, Naeim F: Iliolumbar syndrome as a common cause of low back pain: Diagnosis and prognosis. Arch Phys Med Rehabil 60:415–419, 1979.}

_{61. Hollinshead WH: Anatomy for Surgeons. Ed. 3, Vol. 3, The Head and Neck. Harper & Row, Hagerstown, 1982 (p. 79, Fig. 2–2).}

_{62. Janda V: Evaluation of muscular imbalance. Chapter 6. In: Rehabilitation of the Spine: A Practitioner’s Guide. Edited by Liebenson C. Williams & Wilkins, Baltimore, 1996 (pp. 97-112).}

_{63. Jayasinghe WJ, Harding RH, Anderson JA, et al.: An electromyographic investigation of postural fatigue in low back pain — a preliminary study. Electromyo Clin Neurophysiol 18:191–198, 1978.}

_{64. Jenkins DB: Hollinshead’s Functional Anatomy of the Limbs and Back. Ed. 6. W. B. Saunders, Philadelphia, 1991 (pp. 203, 204).}

_{65. Jonsson B: Morphology, innervation, and electromyographic study of the erector spinae. Arch Phys Med Rehabil 50:638–641, 1969.}

_{66. Jonsson B: Topography of the lumbar part of the erector spinae muscle. Z Anat Entwickl Gesch 130:177–191, 1970.}

_{67 Jonsson B: Electromyography of the erector spinae muscle. In: Medicine and Sport, Vol. 8: Biomechanics III. Edited by Jold E. Karger, Basel, 1973.}

_{68. Kellgren JH: Observations on referred pain arising from muscle. Clin Sci 3:175–190, 1938 (pp. 180, 181, 185, 186; Figs. 3, 5, 9).}

_{69. Kellgren JH: The anatomical source of back pain. Rheumatol Rehabil 16:3—12, 1977 (p. 7, Fig. 3; and p. 9, Fig. 4).}

_{70. Kelly M: Pain in the chest: observations on the use of local anaesthesia in its investigation and treatment. Med J Aust 1:4–7, 1944 (pp. 5, 6, Case 4).}

_{71. Korr IM, Wright HM, Chace JA: Cutaneous patterns of sympathetic activity in clinical abnormalities of the musculoskeletal system. Acta Neurovegetativa 25:489–606, 1964.}

_{72. Korr 1M, Wright HM, Thomas PE: Effects of experimental myofascial insults on cutaneous patterns of sympathetic activity in man. Acta Neurovegetativa 23:329–355, 1962.}

_{73. Kraus H: Clinical Treatment of Back and Neck Pain. McGraw-Hill, New York, 1970 (pp. 83, 98, 105, 106).}

_{74. Lange M: Die Muskelhdrten (Myogelosen); lhre Entstehung und Heilung. J. F. Lehmanns, Monchen, 1931(pp. 30, 91, 137, 138, 152, 158).}

_{75. Letts RM, Quanbury AO: Paraspinal muscle activity. Phys Sportsmed 6(9):80–90, 1978.}

_{76. Lewis T, Kellgren JH: Observations relating to referred pain, viscero-motor reflexes and other associated phenomena. Clin Sci 1:47–71, 1939.}

_{77. Lewit K: Muscular pattern in thoraco-lumbar lesions. Manual Med 2:105–107, 1986.}

_{78. Lewit K: Manipulative Therapy in Rehabilitation of the Locomotor System. Ed. 2. Butterworth Heinemann, Oxford, 1991 (pp. 205–207).}

_{79. Lindstedt F: Zur Kenntnis der Aetiologie und Pathogenese der Lumbago and ahnlicher Ruckenschmerzen. Acta Med Scand 55:248–280, 1921.}

_{80. Lindstedt F: Ober die Nature der muskelrheumatischen (myalgischen) Schmerzsymptome. Acta Med Scand 30(Suppl):1—180, 1929.}

_{81. Livingston WK: Pain Mechanisms, A Physiologic Interpretation of Causalgia and Its Related States. Macmillan, New York, 1943, reprinted by Plenum Press, New York, 1976 (pp. 134, 135).}

_{82. Llewellyn LJ, Jones AB: Fibrositis. Rebman, New York, 1915 (Fig. 39).}

_{83. Lundervold A: Electromyographic investigations during sedentary work, especially typing. Br J Phys Med 14:32–36, 1951.}

_{84. Lynn P: Personal communication, 1995.}

_{85. Macintosh JE, Bogduk N: The biomechanics of the lumbar multifidus. Clinical Biomechanics 1:205–213, 1986.}

_{86. Macintosh JE, Valencia F, Bogduk N, et al.: The morphology of the human lumbar multifidus. Clinical Biomechanics 7:196–204, 1986.}

_{87. Maigne R: Diagnosis and Treatment of Pain of Vertebral Origin: A Manual Medicine Approach. Williams & Wilkins, Baltimore, 1996 (pp. 480–502).}

_{88. McMinn RM, Hutchings RT, Pegington J, et al.: Color Atlas of Human Anatomy. Ed. 3. Mosby-Year Book, St. Louis, 1993 (p. 96).}

_{89. Ibid. (p. 95).}

_{90. Mennell JM: Back Pain. Little, Brown & Company, Boston, 1960.}

_{91. Morris JM, Banner G, Lucas DB: An electromyographic study of the intrinsic muscles of the back in man. J Anat (Lond) 96:509–520, 1962.}

_{92. Morris JM, Lucas DB, Bresler B: Role of the trunk in stability of the spine. J Bone Joint Surg 43A:327–351, 1961.}

_{93. Nachemson A, Lindh M: Measurement of abdominal and back muscle strength with and without low back pain. Scand J Rehabil Med 1:60–65, 1969.}

_{94. №meth G: On hip and lumbar biomechanics. A study of joint load and muscular activity. Scand J Rehabil Med 10(Suppl):1—35, 1984.}

_{95. Nichols PJ: Short-leg syndrome. Br Med J 1:1863–1865, 1960.}

_{96. Okada M: An electromyographic estimation of the relative muscular load in different human postures. J Human Ergol 1:75–93, 1972.}

_{97. Orr LM, Mathers F, Butt T: Somatic pain due to fibrolipomatous nodules, simulating ureterorenal disease: a preliminary report. J Urol 59:1061–1069, 1948.}

_{98. Osier W: The Principles and Practice of Medicine. D. Appleton and Co., New York, 1912 (p. 1131).}

_{99. Patton IJ, Williamson JA: Fibrositis as a factor in the differential diagnosis of visceral pain. Can Med Assoc J 58:162–166, 1948 (Cases 2 and 3).}

_{100. Pauly JE: An electromyographic analysis of certain movements and exercises, I — some deep muscles of the back. Anat Rec 155:223–234, 1966.}

_{101. Pemkopf E: Atlas of Topographical and Applied Human Anatomy, Vol. 2. W. B. Saunders, Philadelphia, 1964 (Fig. 30).}

_{102. Ibid. (p. 35).}

_{103. Price JP, Clare MN, Ewerhardt FH: Studies in low backache with persistent muscle spasm. Arch Phys Rehabil Med 29:703–709, 1948.}

_{104. Rachlin ES; Injection of Specific Trigger Points. Chapter 10. In: Myofascial Pain and Fibromyalgia. Edited by Rachlin ES. Mosby, St. Louis, 1994, pp. 197–360 (see p. 203).}

_{105. Reynolds MD: Myofascial trigger point syndromes in the practice of rheumatology. Arch Phys Med Rehabil 62:111–114, 1981.}

_{106. Richter HR: Fettgewebe «Hemien.» In: Der Weichteilrheumatismus. Vol. 1. Fortbildungskunde Rheumatol. Karger, Basel, 1971 (pp. 49–59).}

_{107. Richter HR: Einklemmungsneuropathien der Rami Dorsales als Ursache von akuten und chronischen Rueckenschmerzen. Ther Umsch 34:435–438, 1977.}

_{108. Rosomoff HL, Fishbain D, Goldberg M, et al.: Myofascial findings in patients with «chronic intractable benign pain» of the back and neck. Pain Manage 3(2):114–118, 1990.}

_{109. Rubin D: An approach to the management of myofascial trigger point syndromes. Arch Phys Med Rehabil 62:107–110, 1981 (p. 110).}