Dynamic aspects of lingual propulsive activity in swallowing |
| |
Authors: | Sandra L Hamlet PhD |
| |
Institution: | (1) Department of Otolaryngology, 5E University Health Center, Wayne State University, 48201 Detroit, MI, USA |
| |
Abstract: | This investigation concerned the effect of different bolus volumes on the characteristics of lingual propulsive activity in
swallowing. Young normal subjects were asked to perform dry swallows and swallows of 5, 10, and 15 ml of water. Tongue activity
was recorded by tracking multiple gold pellets affixed to the tongue, utilizing the specialized research capabilities of the
X-ray Microbeam facility at the University of Wisconsin. The major differences were between dry and liquid swallows, with
dry swallows showing smaller range of movement, higher tongue position at the initiation of lingual propulsive activity, a
slightly different direction of motion, a humped or flat rather than grooved cross-sectional contour of the tongue, lower
peak velocity of motion, and slower progression of activity from tongue blade to dorsum. Within the 5–15 ml range of liquid
bolus volumes, fewer consistent differences were found as a function of bolus size, and some marked individual differences
in swallowing patterns were seen. Data are presented on normal within-subject variability in swallowing, with discussion of
the possible contribution of sensory assessment of bolus size to the modification of oral and pharyngeal characteristics of
swallowing. |
| |
Keywords: | Tongue Deglutition Bolus size |
本文献已被 SpringerLink 等数据库收录! |
|