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Altered states of consciousness represent significant deviations from one's normal mental state. These deviations can range from subtle changes in awareness to profound transformations in perception, thought processes, and sensory experiences. Altered states of consciousness can be triggered by various factors, including drug use, meditation, hypnosis, illness, or even intense fatigue.
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Brain waves are electrical signals generated by the neurons in the brain, which are regularly monitored to measure mental activities. Brain waves and their frequency ranges can be measured using an electroencephalogram or EEG. There are four main types of brain waves, each with distinct characteristics:
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Related Experiment Video

Updated: May 3, 2026

Experimental Methods to Study Human Postural Control
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[Trance(s)--music and more].

Ziva Stahl1, Itamar Grotto2, Dany Moran2

  • 1Department of Nutrition, Israeli Ministry of Health, Jerusalem, Israel. ziva.stahl@moh.health.gov.il

Harefuah
|February 4, 2014
PubMed
Summary

Israel

Area of Science:

  • Nutrition Science
  • Public Health Policy
  • Cardiovascular Health

Context:

  • Growing evidence links trans fatty acids to heart disease.
  • Global and Israeli health authorities aim to reduce chronic disease.
  • Packaged food labeling regulations are evolving worldwide.

Purpose:

  • To review global and Israeli efforts to reduce trans fatty acid consumption.
  • To examine the impact of new Israeli nutrition labeling regulations.
  • To discuss trends in the food industry and public health policies.

Summary:

  • This review covers the negative health effects of trans fatty acids.
  • It highlights updated recommendations on fat consumption from health organizations.
  • It details global food industry shifts and national policies for trans fat reduction.

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Impact:

  • Informs public health strategies for chronic disease prevention.
  • Supports the implementation and understanding of new food labeling laws.
  • Provides insights into industry adaptation and policy effectiveness in reducing trans fat intake.