EEG synchronization induced by high frequency midbrain reticular stimulation in anesthetized cats.
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Anesthetics↗
Biomedical subjects
K Wester
Publications and source records attributed to K Wester.
Serious ski jumping injuries in Norway.
Injuries caused by ski jumping have been poorly investigated. Among approximately 2,200 licensed jumpers in Norway, there occurred at least 12 injuries with a permanent medical disability of greater than or equal to 10%. The risk of being seriously injured is approximately 5% in a 5 year period (1977 to 1981); it is higher in the age group 15 to 17 years. Seven injuries were very serious [four central nervous system (CNS) lesions, two leg amputations, and one blindness of one eye], and five were less serious (sequelae to fractures of the lower extremities). The first jump of the day is particularly dangerous, and so is the beginning and end of the season. It seems dangerous to use more than one standard heel block. Poor preparation of the jump may have contributed to the accidents. Based on the findings, several prophylactic measures are suggested.
Adolescent↗
Improved safety in ski jumping.
Among approximately 2,600 licensed Norwegian ski jumpers, only three injuries that caused a permanent medical disability of at least 10% were incurred during the 5 year period from 1982 through 1986. When compared to the previous 5 year period (1977 to 1981), a dramatic improvement in safety is seen, as both number and severity of such injuries were markedly reduced. There are several probable reasons for this improved safety record: better preparation of the jumps, the return to using only one standard heel block, and the fact that coaches are being more responsible, especially with younger jumpers.
Adolescent↗
Sympathetic functions in parkinsonism treated with stereotactic surgery: observations in ten patients.
Ipsilateral sympathetic deficits, that is symptoms and signs consistent with a diagnosis of Horner's syndrome, have been described in patients who have undergone thalamotomy for dyskinesia as well as for parkinsonism. The present patient material consists of 10 patients with parkinsonism who had undergone stereotactic surgery. Since anhidrosis and miosis are two integral components of Horner's syndrome, forehead sweating and pupillometric response to sympathicomimetic agents have been investigated in this preliminary work. The tests were carried out a considerable time postoperatively. Sweating was stimulated in two different ways: by body heating and by parenterally administered pilocarpine. OH-amphetamine and phenylephrine (an indirectly and a directly acting sympathicomimetic agent) were used in the pupillometric tests. The results were compared with those obtained in a healthy control group. With the OH-amphetamine test, there were some indications of a changed sympathetic activity on the surgical side. However, when comparing these results with those obtained by the phenylephrine test, the inference seems to be allowable that parkinsonian patients operated in this way (target area: ventro-oral thalamic nuclei (Voa and Vop) and the reticular thalamic nucleus) show no definite sympathetic supersensitivity at the late postoperative stage. Our data suggest that the response pattern of the pupils and the sweat glands may be related to the surgical method used and/or to the interval from operation to investigation.
Aged↗