Hi tridacna,
Here's the reseach piece mentioned in my article:
"Acta Otolaryngol. 1988 Jan-Feb;105(1-2):45-9.
Ginger root against seasickness. A controlled trial on the open sea.
Grøntved A, Brask T, Kambskard J, Hentzer E.
Department of Oto-Rhino-Laryngology, Svendborg Hospital, Denmark.
In a double-blind randomized placebo trial, the effect of the powdered rhizome of ginger (Zingiber officinale) was tested on seasickness. Eighty naval cadets, unaccustomed to sailing in heavy seas reported during voyages on the high seas, symptoms of seasickness every hour for 4 consecutive hours after ingestion of 1 g of the drug or placebo. Ginger root reduced the tendency to vomiting and cold sweating significantly better than placebo did (p less than 0.05). With regard to vomiting, a modified Protection Index (PI) = 72% was calculated. Remarkably fewer symptoms of nausea and vertigo were reported after ginger root ingestion For all symptom categories, PI = 38% was calculated."
Also see:
1. "Am J Physiol Gastrointest Liver Physiol. 2003 Mar;284(3):G481-9.
"Effects of ginger on motion sickness and gastric slow-wave dysrhythmias induced by circular vection.
Lien HC, Sun WM, Chen YH, Kim H, Hasler W, Owyang C.
Department of Internal Medicine, Division of Gastroenterology Taichung Veterans General Hospital, National Yang-Ming University, Taipei, Taiwan.
Ginger has long been used as an alternative medication to prevent motion sickness. The mechanism of its action, however, is unknown. We hypothesize that ginger ameliorates the nausea associated with motion sickness by preventing the development of gastric dysrhythmias and the elevation of plasma vasopressin. Thirteen volunteers with a history of motion sickness underwent circular vection, during which nausea (scored 0-3, i.e., none to severe), electrogastrographic recordings, and plasma vasopressin levels were assessed with or without ginger pretreatment in a crossover-design, double-blind, randomized placebo-controlled study. Circular vection induced a maximal nausea score of 2.5 +/- 0.2 and increased tachygastric activity and plasma vasopressin. Pretreatment with ginger (1,000 and 2,000 mg) reduced the nausea, tachygastria, and plasma vasopressin. Ginger also prolonged the latency before nausea onset and shortened the recovery time after vection cessation. Intravenous vasopressin infusion at 0.1 and 0.2 U/min induced nausea and increased bradygastric activity; ginger pretreatment (2,000 mg) affected neither. Ginger effectively reduces nausea, tachygastric activity, and vasopressin release induced by circular vection. In this manner, ginger may act as a novel agent in the prevention and treatment of motion sickness."
2. University of Michigan Health System (UMHS) Alternative Medicine ratings for ginger
Motion Sickness : University of Michigan Health System
But, you are correct--ginger's antimotion sickness properties have yet to be consistently demonstrated across all studies.
Regards,
DocVikingo