頭がウニ!
うーーーーん煮詰まっております。・・・・・It is well known that psychiatric disorders have functional or organic causes involving the brain. But nystagmus tests have not been carried out routinely in psychiatric patients. In 2005, we started investigating the frequency and characteristics of nystagmus by video-oculography in 227 psychiatric patients (144 men, 83 women ) (age range, 16- 100; mean age±SD 62.5±14.0 years) 1). Nystagmus was observed in 56 (24.7%) of 227 patients on gaze, positional and positioning nystagmus tests. Nystagmus was seen in 16 (59.3%) of the 27 cases of alcoholism, 14 (22.2%) of the 63 cases of organic psychiatric disorders, 25 (20.2%) of the 124 cases of schizophrenia, 1 (20.0%) of the 5 cases of excited mental retardation, 0 (0.0%) of the 7 cases of mood disorders, 0 (0.0%) of the 1 case of anxiety disorders and 1 (0.9%) of the 107 subjects (26 men, 81 women, with an average age±SD of 35.6±10.0 years) used as our normal control sample (Figure 1). There was a significant difference between patients with psychiatric diseases and the normal control. Our research was published in European Archives of Otorhinolaryngology in 2008, where we discussed the relationship between the frequency and characteristics of nystagmus with respect to organic and functional psychiatric diseases. Neuro-otological tests are routinely carried out on patients with nystagmus in otolaryngologic departments. However, neuro-otological tests have not been carried out routinely in psychiatric patients.We therefore performed neuro-otological tests on psychiatric patients who exhibited nystagmus.