The effects of bolus viscosity on geniohyoid muscle movements in healthy subjects as evaluated by ultrsonography / 中华物理医学与康复杂志

ABSTRACT

Objective To observe the movement patterns of the geniohyoid muscle in swallowing of healthy subjects by using the real-time B/M-mode ultrasound imaging.Methods Thirty healthy subjects were recruited and the movement patterns of their geniohyoid muscles in swallowing of 5 ml juice-like,thin liquid,honey-like and budding-like bolus.The parameters included the range and the duration of geniohyoid muscle movement.Each subject was measured for 3 times to get the average.Results The range of geniohyoid muscle movement in swallowing of the above bolus was (6.993 ± 1.776)mm,(7.463 ± 1.947)mm,(8.446 ±2.293)mm and (8.905 ±2.057)mm,respectively,with significant differences among them except that between juice-like and thin liquid bolus swallowing,as well as between honey-like and budding-like bolus swallowing.The duration of geniohyoid muscle movement was (0.899 ±0.129)s,(1.019 ±0.149)s,(1.119 ±0.111)s and (1.211 ±0.141)s in juice-like,thin liquid,honey-like and budding-like bolus swallowing,with significant differences among them.When swallowing the same bolus,the range and duration of geniohyoid muscle movement of males were significantly longer than those of females.Conclusions B/M-mode imaging provides a useful technique for assessment the movement of the geniohyoid muscle.The bolus viscosity has an impact on the movement of the geniohyoid muscle.Compared with the range of movement,the duration of geniohyoid muscle movement is a better index for evaluating the effect of bolus viscosity on the geniohyoid muscle movement.