TY - JOUR
T1 - Electromyography of swallowing with fine wire intramuscular electrodes in healthy human
T2 - Activation sequence of selected hyoid muscles
AU - Inokuchi, Haruhi
AU - González-Fernández, Marlís
AU - Matsuo, Koichiro
AU - Brodsky, Martin B.
AU - Yoda, Mitsumasa
AU - Taniguchi, Hiroshige
AU - Okazaki, Hideto
AU - Hiraoka, Takashi
AU - Palmer, Jeffrey B.
N1 - Funding Information:
The late Dr. Karen Hiiemae contributed immensely to this work. We would like to thank Chune Yang for her extraordinary support and assistance. We appreciate the advices offered by Drs. Rebecca Z. German and Allan Thexton. This research was supported in part by NIH/NIDCD award No. R01-DC02123. We partially presented this study at the 17th and 18th Joint Annual Meeting of the Japanese Society of Dysphagia Rehabilitation, Sapporo, Japan, August 31–September 1, 2012.
Publisher Copyright:
© Springer Science+Business Media New York 2014.
PY - 2014/8/21
Y1 - 2014/8/21
N2 - Few studies have reported the activation sequence of the swallowing muscles in healthy human participants. We examined temporal characteristics of selected hyoid muscles using fine wire intramuscular electromyography (EMG). Thirteen healthy adults were studied using EMG of the anterior belly of digastric (ABD), geniohyoid (GH), sternohyoid (SH), and masseter (MA, with surface electrodes) while ingesting thin liquid, banana, tofu, and cookie (3 trials each). Onset timing was measured from rectified and integrated EMG. Data were analyzed using repeated-measures ANOVA with Bonferroni correction. When drinking thin liquid, MA, GH, and ABD were activated almost simultaneously, but SH was activated later (using GH onset as 0 s, MA -0.07 (-0.20 to 0.17) second [median (interquartile range)]; ABD 0.00 (-0.10 to 0.07) second; SH 0.17 (0.02 to 0.37) second; P<0.01). With solid foods, MA contraction preceded GH and ABD; SH was last and delayed relative to liquid swallows (GH 0 s; MA -0.17 (-0.27 to 0.07) second; ABD 0.00 (-0.03 to 0.03) second; SH 0.37 (0.23 to 0.50) second; P<0.01). The role of the MA differs between solids and liquids so the variation in its timing is expected. The synchronous contraction of GH and ABD was consistent with their role in hyolaryngeal elevation. The SH contracted later with solids, perhaps because if the longer duration of the swallow. The consistent pattern among foods supports the concept of a central pattern generator for pharyngeal swallowing.
AB - Few studies have reported the activation sequence of the swallowing muscles in healthy human participants. We examined temporal characteristics of selected hyoid muscles using fine wire intramuscular electromyography (EMG). Thirteen healthy adults were studied using EMG of the anterior belly of digastric (ABD), geniohyoid (GH), sternohyoid (SH), and masseter (MA, with surface electrodes) while ingesting thin liquid, banana, tofu, and cookie (3 trials each). Onset timing was measured from rectified and integrated EMG. Data were analyzed using repeated-measures ANOVA with Bonferroni correction. When drinking thin liquid, MA, GH, and ABD were activated almost simultaneously, but SH was activated later (using GH onset as 0 s, MA -0.07 (-0.20 to 0.17) second [median (interquartile range)]; ABD 0.00 (-0.10 to 0.07) second; SH 0.17 (0.02 to 0.37) second; P<0.01). With solid foods, MA contraction preceded GH and ABD; SH was last and delayed relative to liquid swallows (GH 0 s; MA -0.17 (-0.27 to 0.07) second; ABD 0.00 (-0.03 to 0.03) second; SH 0.37 (0.23 to 0.50) second; P<0.01). The role of the MA differs between solids and liquids so the variation in its timing is expected. The synchronous contraction of GH and ABD was consistent with their role in hyolaryngeal elevation. The SH contracted later with solids, perhaps because if the longer duration of the swallow. The consistent pattern among foods supports the concept of a central pattern generator for pharyngeal swallowing.
KW - Deglutition
KW - Deglutition disorders
KW - Electrodes
KW - Electromyography
KW - Food
KW - Rheology
KW - Spatiotemporal analysis
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U2 - 10.1007/s00455-014-9566-1
DO - 10.1007/s00455-014-9566-1
M3 - Article
C2 - 25142242
AN - SCOPUS:84926667905
SN - 0179-051X
VL - 29
SP - 713
EP - 721
JO - Dysphagia
JF - Dysphagia
IS - 6
ER -