1. Localization of Scopolamine Induced Electrocortical Brain Activity Changes, in Healthy Humans at Rest
- Author
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Pedro Reis, Matthias Lochmann, Friedrich Bodem, Pierre Denise, and Holger Eckhardt
- Subjects
Pharmacology ,medicine.diagnostic_test ,Brain activity and meditation ,business.industry ,medicine.drug_class ,Precuneus ,Electroencephalography ,medicine.disease ,Brain mapping ,medicine.anatomical_structure ,Motion sickness ,Anesthesia ,Cortex (anatomy) ,medicine ,Antiemetic ,Pharmacology (medical) ,business ,Scopolamine Hydrobromide - Abstract
To prevent the participants of parabolic flights from nausea they are optionally treated with subcutaneously injected antiemetic scopolamine. The range ofsideeffectsofthissubstanceincludereductionsofthea‐2frequencyband.Previousstudies,however,havegivennoinformationastowhichgenerator centers are responsible for this effect. The objective of this study therefore, is to identify the cortex area that may be responsible for this effect. Six participants were subcutaneously administered 0.7 mg of scopolamine. EEG was recorded for 10 minutes before to 20 minutes after injection. Data preprocessing followed including filtering and artifact minimization. A statistical analysis was performed with sLORETA/eLORETA software for each subjectoveratimewindowfrom3 minutesbeforeto17–20 minutesafterscopolamineinjection.Resultsshow,that inthe BA7,the precuneus,on both hemispheres suffered a a‐2 activity decrease in absolute power. The identified brain cortex center is an important hub with high connectivity and centrality values within the neural network. It contributes to the control of movement and to space orientation. Therefore, an activity alteration in this area can possibly explain the antiemetic effect of scopolamine and open a window to understand the origin of motion sickness.
- Published
- 2013
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