title: Balance impairment does not necessarily coexist with gait apraxia in mild and moderate Alzheimer's disease.
abstract: OBJECTIVE
  To assess correlations among gait apraxia, balance impairment and cognitive performance in mild (AD1, n = 30) and moderate (AD2, n = 30) AD.
  
  
  METHODS
  The following evaluations were undertaken: gait apraxia (Assessment Walking Skills); balance performance (Berg Balance Scale); Clinical Dementia Rating and Mini-mental State Examination (MMSE).
  
  
  RESULTS
  While disregarding AD subgroups, Berg Balance Scale and the MMSE correlated significantly with Assessment Walking Skills and 23% of all subjects scored below its cut-off. After stratification, Berg Balance Scale correlated significantly with Assessment Walking Skills in both AD subgroups, and with the MMSE only in AD1.
  
  
  CONCLUSIONS
  Balance impairment does not necessarily coexist with gait apraxia. Gait apraxia is more prevalent in moderate AD when compared with mild AD.
authors.affiliation: Universidade Federal de São Paulo, Universidade Federal de São Paulo, São Paulo SP , Brasil, Universidade Federal de São Paulo, Escola Paulista de Medicina, Departamento de Neurologia e Neurocirurgia, São Paulo SP, Brasil.
authors.forename: Fernando Vieira
authors.initials: FV
authors.lastname: Pereira
authors.affiliation: Universidade Federal de São Paulo, Universidade Federal de São Paulo, São Paulo SP , Brasil, Universidade Federal de São Paulo, Escola Paulista de Medicina, Departamento de Neurologia e Neurocirurgia, São Paulo SP, Brasil.
authors.forename: Fabricio Ferreira de
authors.initials: FF
authors.lastname: Oliveira
authors.affiliation: Universidade Federal de São Paulo, Universidade Federal de São Paulo, São Paulo SP , Brasil, Universidade Federal de São Paulo, Escola Paulista de Medicina, Departamento de Neurologia e Neurocirurgia, São Paulo SP, Brasil.
authors.forename: Rodrigo Rizek
authors.initials: RR
authors.lastname: Schultz
authors.affiliation: Universidade Federal de São Paulo, Universidade Federal de São Paulo, São Paulo SP , Brasil, Universidade Federal de São Paulo, Escola Paulista de Medicina, Departamento de Neurologia e Neurocirurgia, São Paulo SP, Brasil.
authors.forename: Paulo Henrique Ferreira
authors.initials: PH
authors.lastname: Bertolucci
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000150:complications* / Q000503:physiopathology; D060825:Cognitive Dysfunction / Q000209:etiology* / Q000503:physiopathology; D005260:Female; D020235:Gait Apraxia / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D015577:Geriatric Assessment; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D004856:Postural Balance / Q000502:physiology*; D012720:Severity of Illness Index