Symptoms of brain tumours affecting the Frontal Lobe. The frontal lobes determine personality and contain the area called the motor cortex that controls movement of the muscles of the body (the motor cortex on the right half of the brain controls the left side of the body and vice versa).
Electrocardiogram Definition. A recording of the electrical activity of the heart. Abbreviated ECG and EKG. An ECG is a simple, noninvasive procedure. Electrodes are placed on the skin of the chest and connected in a specific order to a machine that, when turned on, measures electrical activity all over the heart.
Electrical axis and recording lead vectors (see Figures 2 and 3) The ECG is measured by placing a series of electrodes on the patientâs skin â so it is known as the âsurfaceâ ECG. The wave of electrical depolarisation spreads from the atria down though the IVS to the ventricles. So the direction of this depolarisation is usually from the superior to the inferior aspect of the heart.