LING 2604 Lecture Notes - Lecture 1: Eardrum, Oval Window, Inner Ear
26 Apr 2016
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Lecture 1 - overcoming problems with speech, hearing and vision. Speech uses same muscles for swallowing and eating. Air vibrates through vocal cords in the larynx, air passes the pharynx and palate causing both to vibrate which also play key roles in creating speech. If muscles do not receive messages from brain, speech will become abnormal or absent. Palate must be able to close off completely in order to have normal speech that does not come off nasally . Parkinson"s: degeneration of cells reduce da release, and thus muscle movement is reduced. Cerebral palsy: other nerves send down a constant stream of impulses to the muscles used in talking causing a stiffness (also stiffness/spasticity in arms and legs). The speech then has an abnormal, explosive quality known as spastic dysarthia. Located on dominant side of the brain (right dominant hand, left dominant brain)
