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June 22, 2009
Electroretinography ::
The Electroretinography interprets the electrical activities in the eye. It records all the electrical activities and sends to the sense organs. The external retina is associated with the cerebral cortex. The potentials are easily measured with the positive relative action. Both the interior and exterior sections are measured accurately. The potential changes in the distant electrodes leads to the contact lens. The eye ball illumination has large variations for every potential changes. The slight variations are recorded accurately with care.
Heart Sounds ::
The heart sounds and murmurs are divided into various categories such as low range, medium range and high range. The low range heart sounds in the range of 10 – 60 hertz. It is represented by fourth and third heart sounds. The medium range heart sounds in the range of 60 – 150 hertz. It is represented by second and first heart sounds. The high range heart sounds in the range of 150 – 1000 hertz. It is represented by diastolic, snaps and clicks in the pulmonary insufficiency.
