Previously1 a preliminary note has been published on the voice sign in chorea, and following that a further study2 of this sign in a series of cases.
As a number of requests have come, since these publications, for the technic of elicitation employed to find this sign in the voice, I therefore present here briefly the method used.
The patient is allowed to sit or stand easily. The purpose is to obtain a fair amount of body relaxation. The operator, as an example to the patient, takes a deep inhalation and sounds for from fifteen to twenty seconds the vowel "a" as in "are." Then instruction is given to the patient as follows: "Do that." This is an easy method to elicit the imitation of a prolonged vowel sound. If merely instructions are proffered they are usually not at first understood, and so it takes quite a
SWIFT WB. THE VOICE SIGN IN CHOREA—TECHNIC OF ELICITATIONSTUDIES IN NEUROLOGIC TECHNIC NO. 3. Am J Dis Child. 1915;IX(2):132–133. doi:10.1001/archpedi.1915.04100440053004
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