In the United States, J. Marion Sims followed Browns work and in 1862 slit the neck of a womans uterus and amputated her clitoris, "for the relief of the nervous or hysterical condition as recommended by Baker Brown". When Brown published his views in On the Curability of Certain Forms of Insanity, Epilepsy, Catalepsy, and Hysteria in Females (1866), doctors in London accused him of quackery and expelled him from the Obstetrical Society.Later in the 19th century, A. J. Bloch, a surgeon in New Orleans, removed the clitoris of a two-year-old girl who was reportedly masturbating. According to a 1985 paper in the Obstetrical & Gynecological Survey, clitoridectomy was performed in the United States into the 1960s to treat hysteria, erotomania and lesbianism. From the mid-1950s, James C. Burt, a gynaecologist in Dayton, Ohio, performed non-standard repairs of episiotomies after childbirth, adding more stitches to make the vaginal opening smaller. From 1966 until 1989, he performed "love surgery" by cutting womens pubococcygeus muscle, repositioning the vagina and urethra, and removing the clitoral hood, thereby making their genital area more appropriate, in his view, for intercourse in the missionary position. "Women are structurally inadequate for intercourse," he wrote; he said he would turn them into "horny little mice". In the 1960s and 1970s he performed these procedures without consent while repairing episiotomies and performing hysterectomies and other surgery; he said he had performed a variation of them on 4,000 women by 1975. Following complaints, he was required in 1989 to stop practicing medicine in the United States.
The human balance system integrates proprioceptive, vestibular and nearby visual cues to reckon position and motion. As height increases, visual cues recede and balance becomes poorer even in normal people. However, most people respond by shifting to more reliance on the proprioceptive and vestibular branches of the equilibrium system. Some people are known to be more dependent on visual signals than others. People who rely more on visual cues to control body movements are less physically stable. An acrophobic, however, continues to over-rely on visual signals whether because of inadequate vestibular function or incorrect strategy. Locomotion at a high elevation requires more than normal visual processing. The visual cortex becomes overloaded, resulting in confusion. Some proponents of the alternative view of acrophobia warn that it may be ill-advised to encourage acrophobics to expose themselves to height without first resolving the vestibular issues. Research is underway at several clinics. Recent studies found that participants experienced increased anxiety not only during elevation in height, but also when they were required to move sideways in a fixed height.A recombinant model of the development of acrophobia is very possible, in which learning factors, cognitive factors (e.g. interpretations), perceptual factors (e.g. visual dependence), and biological factors (e.g. heredity) interact to provoke fear or habituation. Assessment
ICD-10 and DSM-5 are used to diagnose acrophobia. Acrophobia Questionnaire (AQ) is a self report that contains 40 items, assessing anxiety level on a 0–6 point scale and degree of avoidance on a 0–2 point scale.