CSD-2260 Lecture Notes - Lecture 21: Functional Magnetic Resonance Imaging, Central Pattern Generator, Electropalatography
11 Nov 2016
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Document Summary
Production of speech: requires an integrated sequence of events. Lips: the lower lip versus the upper lip. Faster and stronger than the upper lip. Does most of the work in lip closure. Can accommodate a variety of jaw positions. Mandible: plays slight role in speech. Position for speech is one of dynamic tension. Requires coordinated activation of elevators and depressors. Tongue: very versatile, most important of the articulators, produces most english phonemes, extrinsic muscles. Involve shaping of the tongue: tongue tip elevation. Superior longitudinal muscle: tongue tip depression. Inferior longitudinal muscle: tongue dip deviation left and right. Left superior and inferior longitudinal muscle: lateral margin relaxation. Posterior genioglossus to produce /l: tongue narrowing. Genioglossus, hyoglossus, chondroglossus: tongue has muscle spindles, golgi tendon organs, and tactile sensor, sensitive to touch. Velum: referred to as the soft palate, performs wide range of movements, production of most speech sounds. Must remain in a moderately elevated position: non-nasal speech.
