Magnetic field effects on spatial discrimination and melatonin levels in mice.

Previous research has demonstrated a decrement in spatial discrimination learning following exposure to a .30 Tesla magnetic field. It had been suggested that those findings might be the result of an interaction between the magnetic field and physiological ferromagnetic material (magnetite).

Magnetic field effects on spatial discrimination learning in mice.

A magnetic sense has been demonstrated in several species, including mice. It has been suggested that the basis of this sense, and its role in navigation, rests on the existence of ferromagnetic materials in the brain. Several researchers have shown changes in navigation during exposure to relatively weak magnetic fields, which presumably interact with magnetite in the brain.