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Posturography in Differential Diagnosis of Normal Pressure Hydrocephalus and Brain Atrophy.
MedLine Citation:
PMID:  22826082     Owner:  NLM     Status:  Publisher    
Differentiation between normal pressure hydrocephalus (NPH) and brain atrophy is difficult in clinical practice. The purpose of this paper was to apply two advanced statistical, pattern recognition methods: discriminant analysis (DA) and k-nearest neighbour (K-NN) for the classification of NPH and atrophy patients to approach computer aided differential diagnosis. The classification is based on a few measures of the center of foot pressure (COP) movements (radius, area, and length). The posturography method gives a measure of current postural stability by a quantitative evaluation of postural sways. Measurements have been performed in the standing upright position in two conditions: with eyes open (EO) and closed (EC). The study comprises 18 patients (mean age 64 ±13 years) diagnosed as normal pressure hydrocephalus and qualifying for shunt implantation. The patients were evaluated by static posturography twice: before and after surgery. The NPH patients were compared with 36 atrophy patients (mean age 64±13 years) and 47 healthy persons (mean age 60 ±7 years). There were two basic dissimilarities in the NPH patients before surgery in comparison with the other groups: very large sways and their independence from vision. Over 90% of the NPH cases both before and after surgery were correctly classified. There also were over 90% of correctly classified patients if we compared the before surgery NPH and atrophy patients. Further posturographic measurements and data collection are needed to verify these results.
Leszek Czerwosz; Ewa Szczepek; Beata Sokolowska; Jerzy Jurkiewicz; Zbigniew Czernicki
Publication Detail:
Journal Detail:
Title:  Advances in experimental medicine and biology     Volume:  755     ISSN:  0065-2598     ISO Abbreviation:  -     Publication Date:  2013  
Date Detail:
Created Date:  2012-7-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0121103     Medline TA:  Adv Exp Med Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  311-324     Citation Subset:  -    
Department of Respiratory Research, Medical Research Center, Polish Academy of Sciences, Pawinskiego 5 St, 02-106, Warsaw, Poland,
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