Sucking |
Vertical lingual motion (coupled with mandibular motion) generates negative pressure in the oral cavity. |
Draw liquid bolus into oral cavity prior to swallowing. |
Non-nutritive: 1-2 Hz Nutritive: 1 Hz |
Mastication |
Lingual motion positions the bolus; mandibular motion generates occlusal force. |
Break down a solid bolus prior to swallowing. |
0.88-2.11 Hz |
Speech |
Rapid and more independent motions of the lips, tongue, jaw, soft palate, and pharynx modulate vocal tract resonance and aeroacoustic valving. |
Aerodynamic expiratory energy, transformed to acoustic energy at the larynx; the spectral shape of this acoustic energy is shaped by the relative positions of the articulators. |
3-4 Hz |