Variation of Electrical Activity of Bovine Cerebrum and Cerebellum Tissue with Temperature

Abstract

The variation of the electrical activity of Bovine cerebrum and
cerebellum tissues within the physiological temperature range of 5°C to
40°C was investigated. Fresh cerebrum and cerebellum samples were
excised from a healthy cow and measurements were carried out on the
tissues within six hours with a Jenway 4010 conductivity meter and
Jenway 2030 pH/bulk electric Potential meter. Data was obtained and
graphs of variation of pH, bulk electric potential and conductivity with
temperature were plotted. The graph of the pH and bulk electric potential
showed an exponential decay and exponential rise with temperature
respectively. The conductivity graph showed a two-phase behaviour as
an Ohmic conductor from 5°C to 25°C and as a semiconductor from
25°C to 40°C displaying a transition temperature.The measurement for
conductivity was carried out in the presence of a static magnetic field of
1.92 mT. The gragh showed that the conductivity significantly changed in
the presence of the field with general increase in values and with distort
comparatively. The key implication of this finding is that the brain tissue
appears to behave like a conductor and a semiconductor with a sharp
transition temperature at (25±1) °C. The brain tissue appears to be
magnetosensitive to magnetic field in it vicinity