携帯電話は、無線周波電磁界(EMF)を発生するが、そのヒト脳への生理的影響は知られていない。PETスキャンを使用して、携帯電話使用事の健常者の局所脳血流(rCBF)への影響を調べた。PETデータは、12名の男性被験者で二重盲検法環境下で、コンピュータ制御付き言語記憶作業で求めた。試験的、客観的なボクセルベースの統計分析からは、使用中の携帯電話アンテナ下でrCBFの局所的な減少を引き起こしたことが得られた。結果はす商業用の携帯電話のEMFは人のrCBFに影響を及ぼすことが分かった。これらの結果は、EMFがニューロンの活動変化をもたらすという仮説と一致する。
The detailed summary of this article is not available in your language or incomplete. Would you like to see a complete translation of the summary? Then please contact us →
To study the effects of a mobile phone on regional cerebral blood flow in 12 healthy humans during exposure to electromagnetic field, while performing a verbal working memory task.
A substantially more sensitive experimental design (concerning the exposure) than in a previous study (publication 10384) was used.
周波数 | 902 MHz |
---|---|
タイプ |
|
波形 |
|
ばく露時間 | 51 mins |
Modulation type | pulsed |
---|---|
Pulse width | 0.577 ms |
Repetition frequency | 217 Hz |
Additional information |
Discontinuous mode was not activated. |
ばく露の発生源/構造 |
|
---|---|
Distance between exposed object and exposure source | 17 mm |
ばく露装置の詳細 | The phone was placed between the subject`s head and the head rest of a positron emission tomography (PET) scanner parallel to the medial plane. The antenna was located circa 17 mm from the surface of the skull over the subject`s left inferior temporal lobe. |
Sham exposure | A sham exposure was conducted. |
Additional information | In order to eliminate audio clues the phone`s loudspeaker was removed and its battery was removed. It was operated with an external power source located 3 m away. The subjects were asked to insert an ear plug into the left ear. The EMF/sham exposure was started at the same moment as the transmission scan. After a 9 min transmission scan, each subject was scanned 14 times, out of which the first or the last seven scans were obtained during a constant EMF or sham exposure. |
The data suggest that the electromagnetic field emitted by a mobile phone affects regional cerebral blood flow in humans. The results revealed that a mobile phone in operation induces a local decrease in regional cerebral blood flow beneath the antenna in the inferior temporal cortex and an increase more distantly in the prefrontal cortex.
The electromagnetic field had no effects on reaction times or the accuracy of responses in the working memory task.
このウェブサイトはクッキー(Cookies)を使って、最善のブラウジングエクスペリエンスを提供しています。あなたがこのウェブサイトを継続して使用することで、私たちがクッキーを使用することを許可することになります。