Effects of a Saffron Alcoholic Extract on Visual Short-Term Memory in Humans: a Psychophysical Study
The effects of an extract from saffron (Crocus sativus L.) on visual short-term memory (STM) were examined in 20 volunteers. The extract was obtained from saffron petals using 100% ethylic alcohol, concentrated by vacuum evaporation, dried, and encapsulated (30 mg per capsula). Ten participants r...
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Видавець: | Інститут фізіології ім. О.О. Богомольця НАН України |
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Дата: | 2014 |
Автори: | , , , |
Формат: | Стаття |
Мова: | English |
Опубліковано: |
Інститут фізіології ім. О.О. Богомольця НАН України
2014
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Назва видання: | Нейрофизиология |
Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/148281 |
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Цитувати: | Effects of a Saffron Alcoholic Extract on Visual Short-Term Memory in Humans: a Psychophysical Study / M. Ghodrat, H. Sahraei, J. Razjouyan, G.H. Meftahi // Нейрофизиология. — 2014. — Т. 46, № 3. — С. 271-278. — Бібліогр.: 22 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of UkraineРезюме: | The effects of an extract from saffron (Crocus sativus L.) on visual short-term memory
(STM) were examined in 20 volunteers. The extract was obtained from saffron petals using
100% ethylic alcohol, concentrated by vacuum evaporation, dried, and encapsulated (30 mg
per capsula). Ten participants received the extract each day for three weeks, while other
10 subjects received encapsulated placebo. Then, the contrast sensitivity of a subject was
estimated; sinusoidal grating patches with different contrast levels (0 – 100%) were used
(experiment 1). In experiment 2, the retention of STM was assessed in two-force choice
tests, using a delayed match to sample paradigm. In experiment 3, the n-back memory test
with different interstimulus intervals (up to 14 sec) was used. It was found that subjects after
medication with the saffron extract demonstrated better correct memorizing of the preceding
visual stimuli (from two to five). At the same time, extract medication somewhat improved
retention of visual STM, but only for several intermediate interstimulus intervals, and the
effect was not very remarkable. Our findings buphasize the expedience to research of the
effects of physiologically active dietary constituents in humans. |
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