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Direct linkHaley, Katarina L.; Jacks, Adam; Jarrett, Jordan; Ray, Taylor; Cunningham, Kevin T.; Gorno-Tempini, Maria Luisa; Henry, Maya L. – Journal of Speech, Language, and Hearing Research, 2021
Purpose: Of the three currently recognized variants of primary progressive aphasia, behavioral differentiation between the nonfluent/agrammatic (nfvPPA) and logopenic (lvPPA) variants is particularly difficult. The challenge includes uncertainty regarding diagnosis of apraxia of speech, which is subsumed within criteria for variant classification.…
Descriptors: Speech Communication, Aphasia, Intonation, Suprasegmentals
Jacks, Adam; Mathes, Katey A.; Marquardt, Thomas P. – Journal of Speech, Language, and Hearing Research, 2010
Purpose: To investigate the hypothesis that vowel production is more variable in adults with acquired apraxia of speech (AOS) relative to healthy individuals with unimpaired speech. Vowel formant frequency measures were selected as the specific target of focus. Method: Seven adults with AOS and aphasia produced 15 repetitions of 6 American English…
Descriptors: Vowels, Speech Impairments, Acoustics, North American English
Narayana, Shalini; Jacks, Adam; Robin, Donald A.; Poizner, Howard; Zhang, Wei; Franklin, Crystal; Liotti, Mario; Vogel, Deanie; Fox, Peter T. – American Journal of Speech-Language Pathology, 2009
Purpose: To explore the use of noninvasive functional imaging and "virtual" lesion techniques to study the neural mechanisms underlying motor speech disorders in Parkinson's disease. Here, we report the use of positron emission tomography (PET) and transcranial magnetic stimulation (TMS) to explain exacerbated speech impairment following…
Descriptors: Stimulation, Speech, Speech Impairments, Diseases
