To investigate the effects of magnetic field exposure on neuron development in rat brain.
Rats were continously exposed to pulsed magnetic fields from two days before birth to one week after birth. At three weeks of age tissue slices of a special part of the brain (the parasolitary nucleus) were investigated.
Modulation type: pulsed
Exposure duration: continuous for 9 days ( 2 days befor and 7 days after birth)
|Exposure duration||continuous for 9 days ( 2 days befor and 7 days after birth)|
|Setup||two aluminum racks seperated by 2 m and arranged in either east-west or north-south direction, wrapped with 72 turns of 30-gauge copper wire Rats were exposed in plastic cages where the magnetic field was perpendicular to the horizontal plane.|
|Additional info||The amplitude of the magnetic fields changed every 30 min and were applied in the following order: 870 nT, 1.04 µT, 1.3 µT, 1.77 µT, 1.33 µT, 1.04 µT and 8 nT. This order was called one cycle and each day such six cycles were applied.|
|magnetic flux density||870 nT||unspecified||measured||-||-|
|magnetic flux density||1.04 µT||unspecified||measured||-||-|
|magnetic flux density||1.3 µT||unspecified||measured||-||-|
|magnetic flux density||1.77 µT||unspecified||measured||-||-|
|magnetic flux density||1.33 µT||unspecified||measured||-||-|
The parasolitary nucleus was found to be significantly smaller, and the number of neurones were significantly reduced in exposed rats. The results of this study suggest that magnetic fields, when applied in a nano-Tesla range and in a specific direction, might interact with the local geomagnetic field to affect cell structures in the rat brain.