The universal, muscular chain reaction, muscle spasm, torsions, ruptures and extravasations. Chameleons of pathology and some manifestations of simple muscular disorders.
Most bodily functions require the coordinated actions of complementary and supplementary paired muscle groups. Where this essential muscular cooperation is lacking, hollow organs may burst and others become literally screwed up, giving rise to many similar spastic diseases such as Torticollis, Twisted ovarian cyst, Torsion of the Testis, Volvulus of the intestines, Varicose Veins, Megacolon, Aortamegaly, Scoliosis, Erb's Palsy, Peyronie's Disease, Main-en-Griffe, Undescended Foot (Pes Cavus), Talipes, Strabismus. Spasm is "panenepidemic" and unclassified examples of Torsion Dystonia and Dyskinesia really are as common as debt and taxes.
D005260:Female; D006801:Humans; D007592:Joint Diseases / Q000209:etiology; D008297:Male; D008954:Models, Biological; D009128:Muscle Spasticity / Q000150:complications*; D010049:Ovarian Diseases / Q000209:etiology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000209:etiology; D012422:Rupture, Spontaneous / Q000209:etiology*; D012600:Scoliosis / Q000209:etiology; D013733:Testicular Diseases / Q000209:etiology; D006848:Testicular Hydrocele / Q000209:etiology; D014102:Torsion Abnormality / Q000209:etiology*