J Korean Dysphagia Soc.  2013 Jul;3(2):86-91.

Kinematic Analysis of Hyo-laryngeal Complex in Parkinson’s Disease

• Kim SJ
• Kwon JY
• Han TR

Abstract

bjective: To find the swallowing characteristics in patients with Parkinson’s disease through the movement analysis of the hyo-laryngeal structures. Method: Thirteen patients who had been diagnosed as Parkinson’s disease and underwent videofluoroscopic swallowing study (VFSS) from January 2006 to December 2008 were selected in our study. Thirty five normal volunteers without any sign of neurological compromise or swallowing problem were recruited for control group. The functional dysphagia scale and the Dysphagia Outcome and Severity Scales (DOSS) were used for the evaluation of dysphagia severity. Maximal anterior and superior displacements of the hyoid (MADH and MSDH), and those of the larynx (MADL and MSDL) were acquired through the kinematic analysis using the Ariel Performance Analysis System. Result: MADH was 9.3 mm in Parkinson group, which was significantly less than that in the control group (p=0.003). Other parameters, MSDH, MADL, and MSDL were not significantly different from those in the control group. MADH was significantly correlated with disease duration (_ρ=0.649, p=0.016). However other kinematic parameters did not show any correlation with disease duration. Current diet status in Parkinson group did not affect the kinematic data in Kruskal-Wallis test (p=0.144 in MADH, p=0.188 in MSDH, p=0.255 in MADS, and p=0.378 in MSDS).
Conclusion
We found that anterior displacement of the hyoid decreased in Parkinson’s disease and this had correlation with the disease duration. Effort to increase the anterior displacement of the hyoid can be made to improve the dysphagia in Parkinson’s disease.

Keyword

Dysphagia; Hyo-laryngeal; Kinematic analysis; Parkinson