Objective: Past research suggests that among older adults increased hyperkinetic perseveration (HKP) is associated with atypical asymmetry in fronto-subcortical circuits (Suchy, Lee, & Marchland, 2013), which also play a role in walking. This study extended this past work by investigating relationships between HKP and performance on an obstructed walking task. Method: Twenty neurologically healthy older adults (61 to 79 years) completed a computerized motor sequencing task (Push Turn Taptap task; PTT) known to elicit HKP and an obstructed walking task, under both single and dual-task (serial-subtraction) conditions. Completion times, number of steps, and number of obstacle contacts were recorded. Results: Collapsing across single and dual conditions, HKPs correlated with total completion time (r = .52, p = .020) and total number of obstacle contacts (r = .54, p = .015), with only a trend for number of steps (r = .42, p = .065). To examine interactions with condition (single...

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