Physiologic and phonatory characteristics of 23 subjects with adductor spastic dysphonia were studied, including examination of the laryngeal appearance by fiberoptic nasoendoscopy, neurologic examination, and measurement of phonatory airflow and speaking fundamental frequency. These characteristics displayed considerable heterogeneity among the subjects investigated. Three patterns of laryngeal appearance during phonation were observed: vocal fold adduction, associated ventricular fold constriction, and approximation of the laryngeal inlet. Eight of 13 subjects demonstrated some neurologic abnormality. For the majority of subjects, the airflow demonstrated marked variability during sustained phonation; for different subjects, this variability was observed to be associated with either an oscillatory or irregular airflow pattern. The modal speaking fundamental frequency for the women and men with adductor spastic dysphonia was not significantly different from that for age- and sex-matched controls.
A high-precision molecular-beam-resonance experiment has been carried out to look for a violation of P and T invariances in a molecule. The null result can be interpreted in terms of the electric dipole moment of the proton to give |d^ |= (7 ±9) xiO""2ig cm.
An analysis of longitudinal data shows that there are marked changes in the variability of stature and stature velocity during growth in stature, as measured by the coefficient of variation. Variability in stature velocity tends to rise after birth but from age 2 years it gradually declines until the end of adolescence, once variation in the timing of adolescence is taken into account. Comparison of velocity variation in an affluent western society (UK) with velocity variation in two poorer societies (India and Thailand) shows the former to be systematically smaller.
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