1/15. motion sickness susceptibility due to a small hematoma in the right supramarginal gyrus.We describe a unique case of a woman who twice experienced episodes of susceptibility to motion sickness that lasted for several months. Both times a small hemorrhage from a cavernous angioma in the supramarginal gyrus (SMG) was detected by MRI. Because the SMG is part of area 7, which belongs to a network of multisensory visual-vestibular cortical areas, we conclude that a small lesion there can cause motion sickness susceptibility.- - - - - - - - - - ranking = 1keywords = mal (Clic here for more details about this article) |
2/15. vertigo in virtual reality with haptics: case report.A researcher was working with a desktop virtual environment system. The system was displaying vector fields of a cyclonic weather system, and the system incorporated a haptic display of the forces in the cyclonic field. As the subject viewed the rotating cyclone field, they would move a handle "through" the representation of the moving winds and "feel" the forces buffeting the handle as it moved. Stopping after using the system for about 10 min, the user experienced an immediate sensation of postural instability for several minutes. Several hours later, there was the onset of vertigo with head turns. This vertigo lasted several hours and was accompanied with nausea and motion illusions that exacerbated by head movements. Symptoms persisted mildly the next day and were still present the third and fourth day, but by then were only provoked by head movements. There were no accompanying symptoms or history to suggest an inner ear disorder. physical examination of inner ear and associated neurologic function was normal. No other users of this system have reported similar symptoms. This case suggests that some individuals may be susceptible to the interaction of displays with motion and movement forces and as a result experience motion illusions. Operators of such systems should be aware of this potential and minimize exposure if vertigo occurs.- - - - - - - - - - ranking = 0.16666666666667keywords = mal (Clic here for more details about this article) |
3/15. Drop attacks secondary to superior canal dehiscence syndrome.Two patients with unprovoked drop attacks were found to have dehiscence of the superior semicircular canal on CT of the temporal bone. Both had conductive hearing loss, preservation of stapedius reflex, and abnormal vestibular evoked myogenic potentials. Neither had sound- or pressure-induced nystagmus. Repair of the dehiscence in one case stopped the drop attacks, supporting a causal relationship between the dehiscence and the drop attacks.- - - - - - - - - - ranking = 0.16666666666667keywords = mal (Clic here for more details about this article) |
4/15. Mal de debarquement presenting in the Emergency Department.Mal de debarquement (MDD) is a common, benign, and self-limited syndrome suffered by many people after disembarkation from an oceangoing vessel. It is characterized by a continuing sensation of being on an unsteady pitching and rolling deck, even after a return to solid ground. Symptoms typically dissipate over several hours or days, but can linger for weeks. There is no effective treatment for MDD, no work-up is required, and patients can be reassured that the symptoms are transient. We present a case of MDD in a previously healthy 22-year-old male, and discuss the approach to MDD in the emergency department setting.- - - - - - - - - - ranking = 0.16666666666667keywords = mal (Clic here for more details about this article) |
5/15. Scopolamine withdrawal syndrome.As travel by air and ship becomes increasingly popular, more and more travelers are using transdermal scopolamine to avoid motion sickness. In fact, it has become almost fashionable for ocean travelers to sit on the sun deck with a patch behind the ear. This article describes withdrawal symptoms in a patient who used transdermal scopolamine beyond the recommended 3 days.- - - - - - - - - - ranking = 0.33333333333333keywords = mal (Clic here for more details about this article) |
6/15. Control of simulator sickness in an AH-64 aviator.An active 33-year-old Army AH-64 aviator with simulator sickness refractory to routine preventive measures was successfully managed with transdermal scopolamine. Although adaptation is the ultimate means for control of simulator sickness, the use of anti-motion sickness medication, specifically transdermal scopolamine, may be a useful adjuvant in selected aviators.- - - - - - - - - - ranking = 0.33333333333333keywords = mal (Clic here for more details about this article) |
7/15. Transdermal scopolamine-induced psychosis.Transdermal scopolamine (Transderm-Scop) is being increasingly used for effective prophylaxis of motion sickness. It is reported to have a lower incidence of CNS side effects than orally administered scopolamine. Although uncommon, such side effects occur more often in the elderly, in those with preexisting psychiatric disease, and in patients concurrently taking other medications with anticholinergic activity. Correct diagnosis may be delayed by the occult location of the delivery system, delayed onset of symptoms, prolonged action, absence of peripheral manifestations, and negative toxicologic screening tests. Treatment is usually supportive. physostigmine should be reserved for the treatment of severe symptoms.- - - - - - - - - - ranking = 0.83333333333333keywords = mal (Clic here for more details about this article) |
8/15. Persistent mal de debarquement syndrome: a motion-induced subjective disorder of balance.Six patients with a distinct syndrome of persistent sensations of imbalance are presented. Common features included onset following a period of motion exposure, symptoms lasting months to years, mild unsteadiness and anxiety, minimal relief from antivertiginous medication, and normal neurologic and quantitative vestibulo-ocular examinations. One patient experienced recurrent episodes. Mal de debarquement refers to sensations of motion experienced on return to stable land after adaptation to motion lasting from hours to days in normal individuals. The presented patients exemplify a syndrome of persistent mal de debarquement. The entity is found in a relatively small number of dizzy patients. Persistent mal de debarquement is discussed in the context of what is known about long-term vestibulo-ocular adaptation to alterations of visual or vestibular environments.- - - - - - - - - - ranking = 1.6666666666667keywords = mal (Clic here for more details about this article) |
9/15. Self-control desensitization with cue-controlled relaxation for treatment of a conditioned vomiting response to air travel.A 33 yr old female with a flying phobia which involved frequent conditioned vomiting and fainting was successfully treated by a combination of self-control desensitization and cue-controlled relaxation. A 12 and 18 month follow-up indicated that treatment effects were maintained. Implications are discussed of this procedure for the treatment of conditioned nausea and vomiting resulting from cancer chemotherapy.- - - - - - - - - - ranking = 0.16666666666667keywords = mal (Clic here for more details about this article) |
10/15. Transdermal scopolamine delivery system (TRANSDERM-V) and acute angle-closure glaucoma.A 58-year-old woman developed unilateral acute angle-closure glaucoma four days after the application of a patch of transdermal scopolamine delivery system (TRANSDERM-V).- - - - - - - - - - ranking = 0.83333333333333keywords = mal (Clic here for more details about this article) |
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