Biomedical subjects

W M Jay

Publications and source records attributed to W M Jay.

57 records · Page 4Linked to original sources

PubMedDate not supplied

Vision and motion sickness.

The development of motion sickness appears intimately related to the visual system. The Sensory Rearrangement Theory states that situations which promote motion sickness are characterized by a condition in which the motion signals transmitted by the eyes, vestibular system, and the nonvestibular proprioceptors are at variance as to what was expected previously. The evolutionary significance of motion sickness rests in its linkage to an early warning system to avoid poisoning. Vision is capable of aiding in the development of suppression of motion sickness. Therapy of motion sickness includes posture, restriction of head movement, visual manipulations, concurrent activity, drugs, and adaptation.

Animals↗

PubMedDate not supplied

Bayes' theorem in ophthalmologic computer diagnosis.

Computers are being investigated as diagnostic aids in many fields of medicine. Models employing Bayes' theorem, a statistical formula, commonly are used to supply valuable information on the likelihood of each disease in the differential diagnosis to help the clinician make the diagnosis. However, knowledge of elementary decision analysis is beneficial to help understand the current and potential uses of these models. We discussed Bayes' theorem as an introduction to decision analysis. Moreover, we described a Bayesian model for the differential diagnosis of leukocoria to illustrate the application of computers to ophthalmologic diagnosis.

Decision Making↗

PubMedDate not supplied

Primary position upbeat nystagmus with organophosphate poisoning.

Upbeat nystagmus is a vertical jerk nystagmus present in the primary position with a fast upward phase. It is to be distinguished from gaze-evoked upbeating nystagmus which is not present in the primary position, but is elicited only on upgaze. Drug toxicity commonly causes gaze-evoked upbeating nystagmus but rarely primary position upbeat nystagmus. A 21-month-old white girl swallowed Dermaton, an organophosphate pesticide, and developed primary position upbeat nystagmus, RBC and plasma cholinesterase levels were markedly depressed, confirming organophosphate poisoning. When the youngster was treated with intravenous atropine, the nystagmus quickly resolved.

Chlorfenvinphos↗