EFFECTS OF BRAIN DAMAGE ON SWALLOWING AND SPEECH

语言和吞咽障碍经常在神经系统疾病中共存。 受损患者 然而，神经运动之间的关系， 语言和吞咽的功能并不明确 之间的相互作用 在本项目中，通过测试 吞咽过程中紊乱的结构运动可能是 由相同的语音运动的声学相关预测， 结构. 吞咽和言语的研究在3组受试者中进行， 持续性脑血管意外在不同水平的神经轴 （皮质、内囊-基底神经节、脑干）和一组 神经系统正常的人 病变定位由以下确定： 核磁共振（NMR）成像，运动模式将被 通过视频透视成像。 舌-软腭、下咽和喉部运动的范围和持续时间 在说话和吞咽过程中将被量化并检查与 神经损伤部位和运动模式 声学特性 语音产生，包括摩擦的持续时间和幅度， 舌-软腭辅音的释放，口-鼻耦合的指数， 测量最大发声时间（s/z比）和音高范围将是 用数字信号处理技术检测。 该组声学 参数将用于预测选定的范围和持续时间的措施， 吞咽 舌-腭、咽和喉吞咽的预测 从语音的声学相关的运动，应该提供练习 语言病理学家或吞咽治疗师， 语言和吞咽，并可能导致新的治疗方法。 其成果将 增加了关于头颈部神经组织的现有知识 完成吞咽和言语产生的结构。

Speech and swallowing disorders frequently co-exist in neurologically impaired patients. However, a neuromotor relationship between the function of speech and swallowing is not well-defined. The interaction between speech and swallowing is investigated in the present project by testing the hypothesis that disordered structural movement during swallowing may be predicted from the acoustic correlates of speech movement by the same structures. Deglutition and speech are studied in 3 groups of subjects who have sustained cerebro-vascular accidents at different levels of the neuraxis (cortical, internal capsule-basal ganglia, brainstem) and a group of neurologically normal subjects. Lesion localization is determined with nuclear magnetic resonance (NMR) imaging, and movement patterns will be imaged with videofluoroscopy. Range and duration of lingua-velar, velopharyngeal, and laryngeal movements during speech and swallowing will be quantified and examined in relation to site of neurologic damage and movement patterns. Acoustic properties of speech productions, including duration and amplitude of frication at the release of a lingua-velar consonant, an index of oral nasal coupling, a measure of maximum phonation time (s/z ratio), and pitch range will be examined with digital signal processing techniques. The set of acoustic parameters will be used to predict selected range and duration measures of swallowing. Prediction of lingua-velar, velopharyngeal and laryngeal swallowing movements from the acoustic correlates of speech, should provide practicing speech pathologists or swallowing therapists with better tools to assess speech and swallowing and could lead to new treatment. The findings will add to current knowledge concerning neural organization of head and neck structures to accomplish swallowing and speech production.