この研究は、超低周波電磁界(ELF-EMF)がラットの海馬での長期増強(LTP)の誘導およびペアパルス比(PPR)を変化させるか否かを、29匹の成獣雄ウィスターラットで実験的に調べた。ラットをELF-EMFばく露群、擬似ばく露群、対照群に分け、ELF-EMF(50Hz、100 μT)を1日2時間、90日間連続で与えた。ばく露終了後、各個体に麻酔下で刺激用の双極電極(貫通枝)と測定用電極(歯状回)を植え込み、高周波刺激により海馬にLTPを誘導した。その結果、ELF-EMFばく露群ではLTP誘導が増加した;ばく露群と他の2群の間には、シナプス後電位のスロープおよび集合スパイク電位の振幅の有意差が見られた;刺激の前後でのPPRには差がなかった、と報告している。
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 investigate the effects of an extremely low frequency magnetic field exposure on the synaptic plasticity in the hippocampus of rats.
Three groups of rats were examined: 1.) magnetic field exposure (n=10), 2.) sham exposure (n=9) and 3.) cage control (n=10).
At the end of the exposure period, rats were anesthetized and a stimulating electrode and a recording electrode were inserted in the brain of the rats. Stimulation was performed using a stimulation protocol of 400 Hz (10 bursts of 20 stimuli, 0.2 ms duration).
ばく露 | パラメータ |
---|---|
ばく露1:
50 Hz
ばく露時間:
2 hours/day for 3 month
|
|
周波数 | 50 Hz |
---|---|
タイプ |
|
波形 |
|
ばく露時間 | 2 hours/day for 3 month |
ばく露の発生源/構造 | |
---|---|
ばく露装置の詳細 | solenoid coil with length of 2 m, radius 20 cm and 100 turns/meter; diameter of copper wire 2 mm; adjustable resistance curcuit was connected to the power source to generate electric and magnetic field |
Sham exposure | A sham exposure was conducted. |
測定量 | 値 | 種別 | Method | Mass | 備考 |
---|---|---|---|---|---|
磁束密度 | 100 µT | - | 測定値 | - | - |
In exposed rats, the excitatory postsynaptic potential slope and the compound action potential were significantly higher in comparison to the sham exposure and the cage control group. No significant differences were observed between the sham exposure and the cage control.
No significant difference in the paired-pulse ratio of the magnetic field exposed rats was observed before and after the stimulation.
The authors conclude that extremely low frequency magnetic fields may change the synaptic plasticity in the hippocampus of rats.
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。