Table 1

 Neuropsychological performance for the seven subjects with amyotrophic lateral sclerosis who had abnormal findings over a six month period early in their disease course

Cognitive domainSubject No
x: z score ⩾−1 standard deviation.
Selective verbal attentionx
Verbal working memoryxx
Verbal short term memoryxxxx
Verbal learningxx
Verbal long term memoryxx
Visuoperception–object decisionxx
Visuoperception–visual discrimination
Executive–visual organisationxx
Executive–hypothesis generationxxxx