The theory promulgated by a number of pedagogues, including me, is that when the zygomatic muscles elevate during inhalation, the shape of the vocal tract is altered, particularly in the faucial (velar region).
There appeared to be a direct relationship between zygomatic muscle elevation and velar position.
37) Miller suggests that changes in the zygomatic musculature may alter the shape of the vocal tract and, while the authors of this study do not refer to "zygomatic" changes, they do suggest that the cheek muscles play an important role in the call technique.
These common instructions adhere to the raised position of the zygomatic muscles as opposed to the idea of the "megaphone mouth" where the muscles of the face are pulled down, resulting in the obvious lowering of the jaw and upper lip in singing.
This project used spectrographic analysis to compare voice spectra that resulted from two different positions of the zygomatic musculature during a series of sung tones.
Zygomatic arches very robust and diverging anteriorly.
2) include: total length of skull (TLS); length of nasals (LNA); length of zygomatic arch (LZA); length of braincase (LBC); length of maxillary diastema (LDI); anterior zygomatic breadth (AZB); middle zygomatic breadth (MZB); posterior zygomatic breadth (PZB); breadth across bullae (BAB); height of maxillary crest (HMC); and middle height of braincase (HMB).
Canonical coefficients (Table 3) of the variables indicate that the height of the maxillary crest (HMC), the middle zygomatic breadth (MZB) and the breadth across the bullae (BAB) are the most important criteria among the 11 variables for discriminating the age groups.
The 11 variables obtained in the analysis of variance and Duncan's test (Table 1) are closely related to such characters, especially with regard to the development of the zygomatic arches, the rostrum, and the maxillary crests (Figs.