Shoulder-Tap Test for Functional Gait Disorders: A Sign of Abnormal Anticipatory Behavior

Functional gait disorders (FGDs) involve gait abnormalities that are internally inconsistent and incongruent with other neurologic disease.1 The clinical pull (or retropulsion) test is commonly used to evaluate postural instability in patients with neurologic gait disorders.2,3 We describe the range of postural responses to the pull test in patients with FGD and explore a variation of the pull test—a “shoulder tap”—that might evoke abnormal anticipatory postural reactions in these patients.

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