Normal speech production is relegated to near automaticity and is dependent upon a highly coordinated coupling of motor output with sensory input from auditory and somatosensory (i.e., sensory inputs from skin, mucosa, muscle and joint receptors) systems. Models of sensorimotor dysfunction, such as Parkinson's disease (PD), demonstrate substantially impoverished sensorimotor integration and degradation of motor control; however, few studies have examined the relationship between changes in sensorimotor integration with speech motor control in diseases such as PD. This study will use laryngeal sensory detection thresholds and laryngeal aerodynamics to examine the relationship between sensorimotor integration and control of speech-related laryngeal movements in a group of patients with idiopathic Parkinson's disease and a group of normal controls.
The specific aims of this study address three questions: (1) Do individuals with PD exhibit different timing of vocal fold medialization than normal controls? (2) Do individuals with PD exhibit different laryngeal sensory detection thresholds than normal controls? (3) What is the relationship between timing of vocal fold medialization and laryngeal sensory detection thresholds? The long-term goal is to improve our understanding of the role of somatosensory input in the precision of speech-related laryngeal movements and how these precise movements are disrupted by changes in sensory integration.

Agency
National Institute of Health (NIH)
Institute
National Institute on Deafness and Other Communication Disorders (NIDCD)
Type
Predoctoral Individual National Research Service Award (F31)
Project #
5F31DC007260-02
Application #
7026968
Study Section
Communication Disorders Review Committee (CDRC)
Program Officer
Sklare, Dan
Project Start
2005-03-01
Project End
2007-02-28
Budget Start
2006-03-01
Budget End
2007-02-28
Support Year
2
Fiscal Year
2006
Total Cost
$28,932
Indirect Cost
Name
University of Kansas Lawrence
Department
Type
Organized Research Units
DUNS #
076248616
City
Lawrence
State
KS
Country
United States
Zip Code
66045
Hammer, Michael J; Barlow, Steven M; Lyons, Kelly E et al. (2011) Subthalamic nucleus deep brain stimulation changes velopharyngeal control in Parkinson's disease. J Commun Disord 44:37-48
Hammer, Michael J; Barlow, Steven M; Lyons, Kelly E et al. (2010) Subthalamic nucleus deep brain stimulation changes speech respiratory and laryngeal control in Parkinson's disease. J Neurol 257:1692-702
Hammer, Michael J; Barlow, Steven M (2010) Laryngeal somatosensory deficits in Parkinson's disease: implications for speech respiratory and phonatory control. Exp Brain Res 201:401-9
Hammer, Michael J (2009) Design of a new somatosensory stimulus delivery device for measuring laryngeal mechanosensory detection thresholds in humans. IEEE Trans Biomed Eng 56:1154-9