Abstract
Patients with specific neural subsystem involvement are often reported to present with particular perceptual characteristics of voice. This has been true even for diseases such as amyotrophic lateral sclerosis (ALS), a progressive disease in which mixed neurologic signs are present. This paper reports acoustic data on the phonatory performance of four women diagnosed with ALS who all had initial bulbar signs and progressive phonatory deterioration. The data pre sent ed in this paper demonstrate that the phonatory char ac ter is tics of women with ALS are not uniform, but in fact may vary greatly from patient to patient.

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