Howard et al., "The functional impact on voice of
sternothyroid muscle division during thyroidectomy," Annals of Surgical Oncology, vol.
Vocalise patterns that involve bridging out of falsetto into full voice, particularly on /u/, which tends to have a lower laryngeal position, can be very helpful for developing the extrinsic stabilizing muscles (omohyoid, sternohyoid,
sternothyroid).
The strap muscles (Sternohyoid,
sternothyroid and superior belly of the omohyoid) are located anteriorly and are innervated by the ansa cervicalis (Ansa hypoglossi).
The sternohyoid muscle was separated and the
sternothyroid muscle was mobilized to provide room for a dissection plane.
Contraction of the sternohyoid and
sternothyroid muscles can lead to a rise in subglottic pressure, shortened cricothyroid distance, lengthening of the vocal folds, and a resultant increase in frequency and intensity, for example.
After reflecting the sternohyoid and
sternothyroid muscles the thyroid gland was exposed.
According to videoendoscopy, other parts of the vocal mechanism often show oscillations in sync with the vibrato, including: (1) laryngeal depressor muscles, such as the
sternothyroid and sternohyoid muscles; (2) the lateral pharyngeal wall; (3) the velum or soft palate; (4) the base of the tongue; (5) and the epiglottis.
unusual insertion of the stylohyoid & digastric muscles, an unusual occurrence of levator submandibuli muscle (Banjo muscle), duplicated or other anomalies of omohyoid, anomalous belly of
sternothyroid muscle or appearance of levator claviculae muscle (1-6).
Sternohyoid and
Sternothyroid were well developed and were seen in their usual forms.