GPS brain seen in pigeon
Depend
on new research piogeon have 53 cell brain that respond to the direction and
strength of the earth magnetic field. Many question about how birds navigate using among other
signal magnetic field is the subject of much debate. These new “gps neuron” seem
to show how magnetic information is represented in birds brain.
Many scientis have the
reason about 53 neurons, first the neuron were candidate for sensor, so they
measured the electrical signal from each one as well as pointing directly. Every
neuron had its own characteristic response to the magnetic field, with each
giving a sort of 3-d compas reading along the
familiar north-short direction as
well as pointing directly upward or dawnward. Another theory suggest that a
magnetic sense may come in receptors in
birds eyes. When expose to light, the
theory says, molecules called
cryptochromes undergo a fleeting changed
in their atomic make up whose length depend on their elignment with a field.
