title: Chest wall movements prior to phonation.
abstract: Movements of the chest wall during the interval between an acoustic stimulus and the subject's vocal response were examined and timed in eight normal males. The reaction-time interval was divisible into two phases, a latency period with duration independent on chest wall status at the time of stimulus and an adjustment period during which the rib cage and abdomen usually moved oppositionally to achieve a prephonatory postural set. The time required for this adjustment varied significantly with lung volume, but was independent of the ventilatory phaze previously in progress.
mesh_terms: D000005:Abdomen / Q000502:physiology; D000161:Acoustic Stimulation; D000328:Adult; D006801:Humans; D008176:Lung Volume Measurements; D008297:Male; D010699:Phonation; D011930:Reaction Time; D012119:Respiration; D013909:Thorax / Q000502:physiology*; D014831:Voice