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KMID : 1003620110030020051
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Journal of Korean Aging Health Friendly Policy Association
2011 Volume.3 No. 2 p.51 ~ p.57
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Pattern of Post-Stroke Swallowing Disorder According to the Brain Lesion
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Lee Ju-Yeon
Kang Ki-Tae
Yang Yeong-Ae
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Abstract
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Purpose : Post-stroke dysphagia occurs in the form of lingual discoordination, pharyngeal dysmotility, and delayed swallowing reflex. The purpose of this study is to define the pattern of post-stroke swallowing disorder according to the location of brain lesion.
Methods : Thiry-five post-stroke patients participated to perform the videofluroscopic swallowing study(VFSS). Brain lesions were classified by cortical, subcortical, or brainstem groups.
Results : There was no difference of swallowing pattern between the cortical and subcortical lesions. However patients with brainstem lesion more frequently showed incomplete laryngeal elevation, prolonged pharyngeal transit time and aspiration than with cortical and subcortical lesions( p<0.05). And patients with cortical lesion more frequently showed prolonged oral transit time than with subcortical and brainstem lesions(p<0.05). In the patients with cortical and subcortical lesions, aspiration occurred before the laryngeal elevation due to discoordination of laryngopharynx. Whereas in the brainstem lesion, aspiration occurred after the laryngeal elevation due to incomplete laryngeal closure.
Conclusion : Discoordination of the tongue, oropharynx, and laryngopharynx is predominant in the cortical and subcortical lesion, whereas in complete laryngeal closure and failure of cricopharyngeal muscle relaxation are predominant in the brianstem lesion.
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KEYWORD
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Videofluoroscopic swallowing study, VFSS, Dysphagia, Stroke
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