The following figures below, show the ‘omohyoid muscle.’ Which is a flat muscle, located at the front of the neck, that belongs to the infrahyoid muscle group. This muscle moves significantly when straining.
When I measured the degree and total amount of movement (see images below) this muscle displays, it was approximately 0.6inches and the muscle became straight. Although, when the muscle is relaxed it became bent. I observed the omohyoid muscle was swollen when moving up.
Furthermore, the muscle hardened double and the laryngeal prominence appeared slightly indented.
This phenomenon makes the performance of vocalization decline. In turn, causing a hoarse voice and narrowing in the space of each resonance chamber, producing a thick voice.
This process and outcome is very similar to a hypertonic voice.
The solution is to create more flexible muscles, when relaxing by initiating only a pinpoint stretch when straining.
The conglutination, which is located between the sternocleidomastoid and the omohyoid muscle, is also equally important.
The sternohyoid muscle(2) lifts up the hyoid bone assisting in swallowing and vocalizing. This role is the same with the omohyoid muscle(1).
This vector movement can be described as large.
The following picture shows where these muscles are located in the throat.
(3)The thyrohyoid muscle and the sternothyroid muscle.
The sternocleidomastoid diverges from the sternal head and the clavicular head. The omohyoid muscle diverges from the epigastrium and the abdomen.
Innervation then occurs. This is the same with the sternocleidomastoid muscle, which diverges from the accessory nerve and the cervical nerves. The omohyoid muscle diverges from the cervical nerves and the hypoglossal nerve.
In conclusion the omohyoid muscle secures the hyoid bone, pulling down the larynx and therefore is a vital muscle used in the process of swallowing and eating.
However, be aware if you strain or use these muscles too much or excessively it will surely cause adverse effects to the voice.