Myographia nova sive Muscolorum omnium (in copore humano hactenus repertorum) accuratissima descripto, in...

An anatomical illustration labeled Tab. 10, showing the musculature of the human larynx and hyoid bone area from a posterior or lateral perspective, integrated into the text block of the third lecture.

THIRD LECTURE.

Elevator of the Larynx.

It arises from the entire side of the Os Hyoides Hyoid bone near the base, from where the side runs down with straight fibers, and is inserted into the lowest and lateral part of the Cartilago scutiformis shield-shaped cartilage, i.e., thyroid cartilage, which, by lifting it, dilates its slit. If you were to completely detach this muscle from its origin and insertion, you would the more easily find the muscles of the Larynx voice box, which this muscle pulls upward with its natural movement.

Depressor of the Larynx.

It arises fleshy and broad from the upper and lower part of the Sternum breastbone, and, keeping the same size throughout, it creeps along the length of the Aspera Arteria trachea or windpipe with straight-line fibers, and is inserted into the lower side of the shield-shaped cartilage, making its slit narrower.

Constrictor of the Larynx.

It arises from the anterior part of the Cartilago Annularis ring-shaped cartilage, i.e., cricoid cartilage, and ends in the sides of the shield-shaped one, pulling the annular one, as anatomists commonly establish, obliquely downward, and thus extending it, opening its slit, so that the voice becomes louder and higher.

Closer of the Arytenoid.

It arises from the lower part of the ring-shaped cartilage, and from there, turning upward, is inserted into the external side of the Arytænoides pitcher-shaped cartilage, opening the larynx by obliquely pulling its cartilage apart, and it is commonly believed to extend the larynx by lateral expansion.