Influence of balance on oral-motor control of speech: a pilot investigation.

In this exploratory study, the interaction between motor coordination for balance and oral-motor control for speech was investigated in 31 typical college-aged women, ages 20 to 29 years (M = 22.3, SD = 2.1), recruited through the local university. Since speech is dependent on the control and coordination of the subsystems of the speech production mechanism, it was hypothesized that a difficult balance task would interfere with speech motor control. Oral-motor control was measured by diadochokinesis while participants were in a nonchallenging balance position (floor standing) and a challenging balance position (balance disk on one leg). Results indicated that individuals compensated for speech rate while having to maintain their balance for the syllable repetitions. However, the number of syllables repeated was significantly fewer while on the balance disk. In addition, a correlational analysis indicated that history of speech therapy services was related to poorer balance screening score. Directions for future research are discussed.