After the false-positive FDG-PET/CT, laryngoscopy showed normal vocal folds
Although there is one description of dyspnea due to a unilateral vocal fold
paralysis published (Laccourreye et al.
Casper, discusses the impact of vocal fold
paralysis from several aspects: physical, emotional, social and vocational.
An operation that cuts one of the nerves of the vocal folds
(the recurrent laryngeal nerve) has improved the voice of many for several months to several years but the improvement is often temporary.
When at rest, the vocal folds
are open to allow an individual to breathe.
Cellular-based approaches using tissue engineering and regenerative medicine techniques like Fibrocell's autologous fibroblasts are promising for the treatment of vocal scars because patients' own cells are made to work to re-create the extracellular matrix of the LP layer, potentially reestablishing normal mucosal pliability of the vocal folds
The researchers also saw some interesting "nonlinear phenomena" in the way the elephant vocal folds
The new study's key finding is that lions and tigers can roar loudly and deeply because their vocal folds
have a flat, square shape and can withstand strong stretching and shearing.
Patients received treatment with Radiesse for two types of voice disorders: paralysis of the vocal folds
in which one of the vocal cords doesn't move to meet the middle opening between the two vocal folds
; and glottal incompetence in which the two vocal cords move but are thin and weak and don't meet together to close the middle opening completely (usually due to muscle damage or muscle loss associated with aging).
Typically, paralysis of the vocal folds
results from a medical condition such as lung cancer or neck or chest surgery.
Instead, the researchers speculate that the fat gives the vocal folds
their square shape (as opposed to the more traditional triangular vocal folds
found in most species), and may cushion the vocal folds
and provide repair material when they are damaged.
Even the mildest abnormality of the vocal folds
can lead to hoarseness.