Effects of secobarbital and d-amphetamine on tracking performance during angular acceleration.
نویسندگان
چکیده
Thirty young men were randomly assigned in equal numbers to one .of the following groups: placebo (lactose), secobarbital (100 mg), or d-amphetamine (10 mg). The drugs or placebo were administered in capsules in a double-blind procedure following practice at a tracking task and baseline determinations of tracking performance levels in both static (stationary) and dynamic (angular acceleration) conditions. Tests were scheduled 1' 2' and 4 hours after capsule ingestion; all tests were conducted inside a Stille-Werner rotator and were in total darkness with the exception of the illuminated tracking display. With the rotator stationary, d-amphetamine subjects performed significantly better than controls during the 2-hour and 4-hour post-drug sessions; no other static differences among the groups were significant. However, during angular acceleration, secobarbital subjects made significant l y more tracking errors and had significantly more vestibular nystagmus than both tl-:e control and the d-amphetamine groups for all post-drug sessions. These findings agree with our previous studies of alcohol effects: depressant drugs may have little or no deleterious influence on tracking performance in static environments, but may produce marked performance degradation during angular motion. The primary cause of this performance impairment appears to be a vestibulo ocular one; ~=he ability to inhibit vestibular nystagmus by visual fixation is impaired.
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ورودعنوان ژورنال:
- Ergonomics
دوره 17 5 شماره
صفحات -
تاریخ انتشار 1974