and limb skeletal muscle: Lessons in contrast.
Carbon dioxide laser-assisted thyroarytenoid
8) It is interesting to note that in 2 of these patients, botulinum toxin was injected into the thyroarytenoid muscle to "diminish forces pulling the vocal process away from the body of the arytenoid cartilage.
The posterior cricoarytenoid muscle is the single abductor t of the vocal fold, and the lateral cricoarytenoid muscle s contributes to adduction in concert with the action of the thyroarytenoid muscle.
1 ml normal saline) were injected into each of two locations on each thyroarytenoid
muscle with a 25-gauge laryngeal injection needle at the time of direct laryngoscopy.
Findings on laryngeal EMG were essentially normal except for the detection of a few large-amplitude motor units within the left thyroarytenoid
muscle that were not consistent with a focal laryngeal mononeuropathy.
Flexible and rigid stroboscopy demonstrated severe atrophy and weakness of the right thyroarytenoid
muscle, incomplete adduction of the left vocal fold, bilateral vocal fold scarring, reflux laryngitis, a left vocal fold mass, supraglottic compression, and bilateral varicosities (figure).
The injection should be deep enough to reach into the substance of the thyroarytenoid
muscle at the level of the free edge of the vocal fold.
A colorimetric assay for malondialdehyde (MDA) and 4-hydroxy-2-nonenal (4HNE) was performed on extracts taken from thyroarytenoid
muscle harvested from fresh cadaveric laryngeal specimens.
26] The third motor branch innervates the lateral cricoarytenoid muscle (LCA), passing through it to terminate in the thyroarytenoid
7] This is in contrast to other evidence that suggests that fast-twitch fibers in the thyroarytenoid
and lateral cricoarytenoid muscles are reinnervated more rapidly and to a greater degree than slow-twitch fibers.
These findings suggest either deep thyroarytenoid
muscle or cricothyroid joint involvement.