1 / 51

Neuroanatomic and Neurophysiologic Underpinnings of Acquired Dysarthrias

Speech is a Complex Motor Act. Disproportionate cortical sensorimotor space allotted to larynx, palate, tongue, lips.It recruits more motor fibers than any other human mechanical behavior. It generates multimodal feedback (auditory, tactile, kinesthetic, barometric, airflow), probably more than a

adele
Download Presentation

Neuroanatomic and Neurophysiologic Underpinnings of Acquired Dysarthrias

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

    1. Neuroanatomic and Neurophysiologic Underpinnings of Acquired Dysarthrias Oklahoma Speech-Language-Hearing Assoc. Sept. 30, 2010 Joe Duffy, Ph.D., BC-ANCDS Mayo Clinic Rochester MN

    2. Speech is a Complex Motor Act Disproportionate cortical sensorimotor space allotted to larynx, palate, tongue, lips. It recruits more motor fibers than any other human mechanical behavior. It generates multimodal feedback (auditory, tactile, kinesthetic, barometric, airflow), probably more than any other routine motor behavior. Large # of muscles & neuromuscular events per unit of time (perhaps the fastest discrete human motor behavior). 140,000 + neuromuscular events per sec Temporal precision in range of 10 msec.

    3. Motor Speech Disorders Include: Dysarthrias Apraxia of speech May be: Congenital or acquired Static, improving, worsening Associated with lesions in variety of CNS & PNS structures Caused by numerous diseases/conditions

    4. Dysarthria A collective name for a group of MSDs associated with disturbed muscular execution or control of the speech mechanism due to CNS and/or PNS damage. May include abnormalities in strength, speed, range, tone or accuracy of speech movements. May affect respiration, phonation, resonance, articulation, & prosody.

    5. Dysarthria…….. Includes several different types, each corresponding to damage to particular part(s) of the nervous system, & presumably each having different underlying neuropathophysiology. Each type has different auditory perceptual characteristics which can be distinguished clinically. Accurate identification has implications for localization & medical diagnosis; accurate description provides clues for management.

    6. Dysarthria Types

More Related