User:Donmiles01/sandbox

Introduction

Introduction
The BESA program was founded in 1995 by Dr. Michael Scherg. It was originally named MEGIS Software GmbH. BESA combines the latest technology borrowing from the fields of computer sciences and well as Neurology to produce accurate images of the Brian. BESA is an EEG (electroencephalogram) that measure brain activity by attaching sensors the scalp of a patient. The electrodes are attached to a computer that deciphers and interprets brain waves by measuring the activity of different parts of the brain.

Preparation for BESA
Before the BESA test certain preparatory measure are taken. This is done so that variables do not interfere with the BESA program. Before a proper test is conducted using BESA, a doctor should ask whether the patient is taking any sedatives. Such sedatives as tranquilizers, muscle relaxers, and sleeping aids may interfere with BESA testing. Also, a doctor will issue that a patient does not use the stimulant caffeine, as this may also interfere with testing. Such items that contain caffeine include coffee, tea, cola and chocolate which are strictly prohibited 12 hours before the patient undergoes testing. Another precaution that is taken is that all hair products be completely removed from the patients scalp because this may also interfere with testing. In certain scenarios, it is important to not get a full nights rest. This is important because some tests can be taken while the patient sleeps in order to detect brain abnormalities.

How BESA Works
BESA works in the same manner in which other EEGs work. In the brain there are billions of neurons that fire across the entire network of the brain. In this manner, the neurons are constantly pushing against each other to cause a chain reaction. This chain reaction is actual an electrical current. This electrical current is also know as a brain wave. These changing currents generate electric and magnetic fields that can be recorded from the surface of the scalp. The electric fields are measured by attaching small electrodes to the scalp. Individual firings of these electrical currents are to small to calculate alone. Instead an EEG picks up on the spacial pattern of about one thousand to one million plus electrons that are being fired across the brain.