Angel Molina Leon*
Hospital of St. Lucia. Clinical Neurophysiology Service, Cartagena, Spain
Received date: August 14, 2015; Accepted date: August 18, 2015; Published date: August 25, 2015
Citation: Leon AM (2015) Dementias: Turning to Slowing of Background Plotting a Frequency Subalf. J Alzheimers Dis Parkinsonism 5: i101.doi:10.4172/2161-0460.1000i101
Copyright: © 2015 Leon AM. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Dementias; Firda; Thalamus –corticales; Encephalopathy
Often defragmentation parietal-occipital alpha rhythm to 9-10 Hz. Turning to slowing of background plotting a frequency subalfa.
Although firda is a nonspecific sign, it is highly suggestive of the early stages of a coma and is an early sign of dysfunction warning system. They are caused by interaction between the thalamus -corticales circuits. It indicates some degree of cortical alteration.