Digit Symbol.30 This subtest of the Weschler Adult Intelligence Scale-Revised (WAIS-R) is a measure of a number of abilities, such as motor speed, sustained attention, verbal encoding skill, persistence, and visuomotor coordination. The multifaceted nature of this task results in a strong nonspecific sensitivity to brain dysfunction. Scores reflect the number of digit symbol pairs completed in 90 seconds.
Digit Span.30 Also a subtest of the WAIS-R, this task is actually a combination of two different tests, digits forward and digits backward. Although both involve auditory attention, digits backward is much more demanding of working memory, in addition to requiring simultaneous processing skills and internal scanning abilities. Scores are based on the number of digits correctly repeated for both forward and backward spans.
Corsi Block-Tapping. As a visuospatial analogue to the digits forward component of Digit Span (see above), this test primarily assesses the ability to attend to and immediately recall visuospatial relationships presented sequentially, but also helps detect the presence of visual field defects. The total score is the maximum number of blocks touched in correct sequence.
Category: Obstructive Sleep Apnea
Tags: cardiac arrhythmias, diastolic blood pressure, hypopnea, obstructive sleep apnea