Stringhalt Stringhalt Stringhalt is a sudden flexion of one or both hind legs in the horse, most easily seen while the horse is walking or trotting. It is most evident when the horse is backing up slowly, turning on the affected leg, or suddenly frightened. It can involve one or both hind legs of the horse. It is a spasmodic contraction of the lateral extensor tendons of the hind legs. There are four forms of stringhalt: Treatment varies. Australian stringhalt was described and differentiated from classical stringhalt in 1884. Australian stringhalt is differentiated from classical stringhalt by the severity, occurrence of
Premenstrual dysphoric disorder with PMDD are more sensitive to normal levels of hormone fluctuations, predominantly estrogen and progesterone which produces biochemical events in the nervous system that cause the premenstrual symptoms. These symptoms are more predominant in women who have a predisposition to the disorder. While the etiology of the PMDs is still under investigation, it is apparent that these disorders are biologically driven and are not simply psychological or cultural phenomena. PMDD is found in women worldwide, indicating a biological basis. Most psychologists infer that this disorder is caused by both reaction to hormone influx and genetic components. There is evidence of