I shall first briefly review the literature on chorea, then summarize that literature, mention the older methods, show the newer methods and the results obtained, with my conclusions.
The earliest recorded reference to voice changes in chorea is by John Eberle,1 1841, who said, "The voice is altered and articulation is indistinct and stuttering." From this date it is interesting to follow the literature somewhat chronologically.
Dunglison2 in 1842 wrote, "The articulation is also affected at times so as to occasion stammering."
Romberg,3 1853 (Graves), cites three cases in which the respiratory function was profoundly affected.
Meigs and Pepper,4 1870, said, "The muscles of the internal and external respiratory apparatus are rarely affected."
Von Ziemssen,5 who, according to Graves, seems to be the first to have paid particular attention to the disturbed respiratory function in chorea, says, previous "views are too ambiguous to permit of
SWIFT WB. A VOICE SIGN IN CHOREAPRELIMINARY REPORT. Am J Dis Child. 1914;VII(6):422–427. doi:10.1001/archpedi.1914.04100420015002