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Journal of Speech and Hearing Research Vol.34 796-800 August 1991.
© American Speech-Language-Hearing Association
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Thalamic-Induced Stuttering (Surgical Observations)

Orlando J. Andy 1
Subhash C. Bhatnagar 2
1 Department of Neurosurgery University of Mississippi Medical Center
2 Department of Speech Pathology and Audiology Marquette University and Department of Neurosurgery University of Mississippi Medical Center

Repetitive dysfluencies of speech were elicited by mechanical perturbation of the thalamus in a patient, preparatory to therapeutic lesion placement for chronic pain Perturbation consisted of a 2 mm advancement of a 1 mm diameter electrode in the posteroventromedial thalamus. A thalamogram revealed electropathologic discharges at the site of perturbation. These findings are of special interest anatomically because in other patients, electrical stimulation at the same site was found to alleviate stuttering (Andy, 1987; Andy, 1989; Andy & Jurko, 1985; Bhatnagar & Andy, 1989). It is suggested that dysfluencies in this patient may have resulted from an electrophysiologic disturbance of the mesothalamic component of a speech-regulating corticomesothalamic feedback circuit.

KEY WORDS: electropathologic discharges, thalamus, acquired stuttering, mesothalamus, electrophysiological impairments

Submitted on May 15, 1990
Accepted on October 16, 1990


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