Journal of Natural Medicines

, Volume 70, Issue 2, pp 190–197

Investigation of sedative and hypnotic effects of Amygdalus communis L. extract: behavioral assessments and EEG studies on rat

  • Fatemeh Abdollahnejad
  • Mahmoud Mosaddegh
  • Mohammad Kamalinejad
  • Javad Mirnajafi-Zadeh
  • Forough Najafi
  • Mehrdad Faizi
Original Paper

Abstract

Amygdalus communis L. (almond) has been traditionally used as a natural medicine in the treatment of various diseases. The present research studied the sedative and hypnotic effects of the aqueous fraction of seeds of almond in rats. In order to investigate these effects, a combination of behavioral methods (open field test and loss of righting reflex test) as well as quantitative and analytic methods (EEG and EMG) were applied. The results of the open field test showed that a dose of 400 mg/kg of the almond extract significantly inhibited the locomotion activity of rats compared to normal. The results also illustrated that the almond extract affected pentobarbital-induced sleep through increasing the number of fallings asleep and prolongation of sleeping time. Analysis of EEG recordings of the animals which had received the same dose of the almond extract as the open field test demonstrated marked changes in the animals’ sleep architecture. Significant prolongation of total sleeping time as well as significant increase in NREM sleep were the main observed changes compared to the normal condition. These results suggest that the aqueous extract of almond has significant sedative and hypnotic effects, which may support its therapeutic use for insomnia.

Keywords

Amygdalus communis L. Traditional medicine Aqueous extract Sedative and hypnotic effects 

Copyright information

© The Japanese Society of Pharmacognosy and Springer Japan 2015

Authors and Affiliations

  • Fatemeh Abdollahnejad
    • 1
  • Mahmoud Mosaddegh
    • 1
  • Mohammad Kamalinejad
    • 2
  • Javad Mirnajafi-Zadeh
    • 3
  • Forough Najafi
    • 4
  • Mehrdad Faizi
    • 5
  1. 1.School of Traditional MedicineShahid Beheshti University of Medical SciencesTehranIran
  2. 2.Department of Pharmacognosy, School of PharmacyShahid Beheshti University of Medical SciencesTehranIran
  3. 3.Department of Physiology Faculty of Medical SciencesTarbiat Modares UniversityTehranIran
  4. 4.Department of Biomedical EngineeringShahed University of Medical SciencesTehranIran
  5. 5.Department of Pharmacology and Toxicology, School of PharmacyShahid Beheshti University of Medical SciencesTehranIran

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