Abstract
Superior and anterior hyoid movements are important events in pharyngeal deglutition. This cross-sectional study uses a cadaver model to document the structural properties of the muscles underlying these movements in an effort to understand how their morphology influences function. Measurements to determine physiological cross-sectional areas (PCSAs) of swallowing muscles were taken from hemisected head and neck formalin-fixed cadaver specimens (n = 13). Coordinates of muscle attachment sites and PCSAs were used to calculate $$ \hat{i} $$ and $$ \hat{j} $$ unit force vectors, where $$ \hat{i} $$ and $$ \hat{j} $$ represent anterior-posterior and superior-inferior directions, respectively. The suprahyoid muscle subsamples were grouped for analysis as follows: digastric (DG), geniohyoid (GH), mylohyoid (MH), and stylohyoid (SH). The ANOVA with Tukey HSD post hoc analysis of unit force vectors showed the following results: GH (-0.44 ± 0.15 cm 2) >MH (-0.02 ± 0.21 cm 2), DG (-0.05 ± 0.11 cm 2), SH (0.14 ± 0.04 cm 2), with negative values representing the anterior direction (p < 0.01); and MH (0.91 ± 0.28 cm 2) >DG (0.29 ± 0.14 cm 2), SH (0.22 ± 0.08 cm 2), GH (12 ± 0.08 cm 2), with positive values representing the superior direction (p < 0.01). The morphology of the suprahyoid muscles suggests that based on structural properties, the geniohyoid has the most potential to displace the hyoid in the anterior direction and the mylohyoid has the most potential to displace the hyoid in the superior direction. These data in complement with physiological findings may provide greater insight into these movements for those developing novel treatments for dysphagia.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 345-351 |
| Number of pages | 7 |
| Journal | Dysphagia |
| Volume | 26 |
| Issue number | 4 |
| DOIs | |
| State | Published - Dec 1 2011 |
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Keywords
- Deglutition
- Deglutition disorders
- Hyoid movement
- Physiological cross-sectional area
- Structural properties
- Suprahyoid muscles
ASJC Scopus subject areas
- Otorhinolaryngology
- Gastroenterology
- Speech and Hearing
Cite this
Evaluating the structural properties of suprahyoid muscles and their potential for moving the hyoid. / Pearson, William Gordon; Langmore, Susan E.; Zumwalt, Ann C.
In: Dysphagia, Vol. 26, No. 4, 01.12.2011, p. 345-351.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Evaluating the structural properties of suprahyoid muscles and their potential for moving the hyoid
AU - Pearson, William Gordon
AU - Langmore, Susan E.
AU - Zumwalt, Ann C.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - Superior and anterior hyoid movements are important events in pharyngeal deglutition. This cross-sectional study uses a cadaver model to document the structural properties of the muscles underlying these movements in an effort to understand how their morphology influences function. Measurements to determine physiological cross-sectional areas (PCSAs) of swallowing muscles were taken from hemisected head and neck formalin-fixed cadaver specimens (n = 13). Coordinates of muscle attachment sites and PCSAs were used to calculate $$ \hat{i} $$ and $$ \hat{j} $$ unit force vectors, where $$ \hat{i} $$ and $$ \hat{j} $$ represent anterior-posterior and superior-inferior directions, respectively. The suprahyoid muscle subsamples were grouped for analysis as follows: digastric (DG), geniohyoid (GH), mylohyoid (MH), and stylohyoid (SH). The ANOVA with Tukey HSD post hoc analysis of unit force vectors showed the following results: GH (-0.44 ± 0.15 cm 2) >MH (-0.02 ± 0.21 cm 2), DG (-0.05 ± 0.11 cm 2), SH (0.14 ± 0.04 cm 2), with negative values representing the anterior direction (p < 0.01); and MH (0.91 ± 0.28 cm 2) >DG (0.29 ± 0.14 cm 2), SH (0.22 ± 0.08 cm 2), GH (12 ± 0.08 cm 2), with positive values representing the superior direction (p < 0.01). The morphology of the suprahyoid muscles suggests that based on structural properties, the geniohyoid has the most potential to displace the hyoid in the anterior direction and the mylohyoid has the most potential to displace the hyoid in the superior direction. These data in complement with physiological findings may provide greater insight into these movements for those developing novel treatments for dysphagia.
AB - Superior and anterior hyoid movements are important events in pharyngeal deglutition. This cross-sectional study uses a cadaver model to document the structural properties of the muscles underlying these movements in an effort to understand how their morphology influences function. Measurements to determine physiological cross-sectional areas (PCSAs) of swallowing muscles were taken from hemisected head and neck formalin-fixed cadaver specimens (n = 13). Coordinates of muscle attachment sites and PCSAs were used to calculate $$ \hat{i} $$ and $$ \hat{j} $$ unit force vectors, where $$ \hat{i} $$ and $$ \hat{j} $$ represent anterior-posterior and superior-inferior directions, respectively. The suprahyoid muscle subsamples were grouped for analysis as follows: digastric (DG), geniohyoid (GH), mylohyoid (MH), and stylohyoid (SH). The ANOVA with Tukey HSD post hoc analysis of unit force vectors showed the following results: GH (-0.44 ± 0.15 cm 2) >MH (-0.02 ± 0.21 cm 2), DG (-0.05 ± 0.11 cm 2), SH (0.14 ± 0.04 cm 2), with negative values representing the anterior direction (p < 0.01); and MH (0.91 ± 0.28 cm 2) >DG (0.29 ± 0.14 cm 2), SH (0.22 ± 0.08 cm 2), GH (12 ± 0.08 cm 2), with positive values representing the superior direction (p < 0.01). The morphology of the suprahyoid muscles suggests that based on structural properties, the geniohyoid has the most potential to displace the hyoid in the anterior direction and the mylohyoid has the most potential to displace the hyoid in the superior direction. These data in complement with physiological findings may provide greater insight into these movements for those developing novel treatments for dysphagia.
KW - Deglutition
KW - Deglutition disorders
KW - Hyoid movement
KW - Physiological cross-sectional area
KW - Structural properties
KW - Suprahyoid muscles
UR - http://www.scopus.com/inward/record.url?scp=83655164778&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=83655164778&partnerID=8YFLogxK
U2 - 10.1007/s00455-010-9315-z
DO - 10.1007/s00455-010-9315-z
M3 - Article
C2 - 21069388
AN - SCOPUS:83655164778
VL - 26
SP - 345
EP - 351
JO - Dysphagia
JF - Dysphagia
SN - 0179-051X
IS - 4
ER -