Adjust Text Size:change font sizechange font sizechange font sizechange font sizechange font sizechange font size

Featured Research

What can we learn by studying genetics and Parkinson's? PDF-funded researchers Drs. Mata and Zabetian share their progress six years after launching the first large-scale survey of PD genetics in Latin America.

Learn More

PDF Grant Programs

Are you interested in furthering Parkinson's science? View PDF's open grant programs.

Learn More


Stimulation of the pedunculopontine nucleus area in Parkinson's disease: effects on speech and intelligibility.

PDF's targeted PubMed search provides you with access to journal articles from the last 90 days that may be pertinent to Parkinson's disease research. 

Not what you're looking for? Do you need informational publications about Parkinson's targeted for people living with Parkinson's, caregivers and family members?  Please browse PDF's educational materials and programs - which are all available electronically or in print.  Order for yourself, a loved one or in bulk for your patients or support group.

Brain 2014 Oct; 137(Pt 10):2759-72

Authors: Serge Pinto, Murielle Ferraye, Robert Espesser, Valérie Fraix, Audrey Maillet, Jennifer Guirchoum, Deborah Layani-Zemour, Alain Ghio, Stéphan Chabardès, Pierre Pollak, Bettina Debû

Improvement of gait disorders following pedunculopontine nucleus area stimulation in patients with Parkinson's disease has previously been reported and led us to propose this surgical treatment to patients who progressively developed severe gait disorders and freezing despite optimal dopaminergic drug treatment and subthalamic nucleus stimulation. The outcome of our prospective study on the first six patients was somewhat mitigated, as freezing of gait and falls related to freezing were improved by low frequency electrical stimulation of the pedunculopontine nucleus area in some, but not all, patients. Here, we report the speech data prospectively collected in these patients with Parkinson's disease. Indeed, because subthalamic nucleus surgery may lead to speech impairment and a worsening of dysarthria in some patients with Parkinson's disease, we felt it was important to precisely examine any possible modulations of speech for a novel target for deep brain stimulation. Our results suggested a trend towards speech degradation related to the pedunculopontine nucleus area surgery (off stimulation) for aero-phonatory control (maximum phonation time), phono-articulatory coordination (oral diadochokinesis) and speech intelligibility. Possibly, the observed speech degradation may also be linked to the clinical characteristics of the group of patients. The influence of pedunculopontine nucleus area stimulation per se was more complex, depending on the nature of the task: it had a deleterious effect on maximum phonation time and oral diadochokinesis, and mixed effects on speech intelligibility. Whereas levodopa intake and subthalamic nucleus stimulation alone had no and positive effects on speech dimensions, respectively, a negative interaction between the two treatments was observed both before and after pedunculopontine nucleus area surgery. This combination effect did not seem to be modulated by pedunculopontine nucleus area stimulation. Although limited in our group of patients, speech impairment following pedunculopontine nucleus area stimulation is a possible outcome that should be considered before undertaking such surgery. Deleterious effects could be dependent on electrode insertion in this brainstem structure, more than on current spread to nearby structures involved in speech control. The effect of deep brain stimulation on speech in patients with Parkinson's disease remains a challenging and exploratory research area.

PMID: 25080284 [PubMed - as supplied by publisher]

See More

Back to PubMed Articles