Laryngeal Injury
There was a recent question about what someone with laryngeal injury would sound like and how that injury might occur. There are numerous excellent medical resources on this so I want to distill it down for a story writing audience.
The larynx refers to a section of the anatomy rather than a single discrete item. It contains cartilage, muscles, and the vocal cords/folds. The most notable piece of cartilage is the epiglottis, which covers the larynx to prevent food and liquid from going into the respiratory tract while swallowing. The vocal cords control sound generation and the muscles of the larynx control airflow.
Vocal cords primarily control pitch, volume, and limited phonation during speech. There are certain phonemes or word sounds produced in the larynx but most of the ones used in English are created in other parts of the respiratory tract, usually in the mouth.
Injury:
Just like every other organ, there are number ways of injuring the larynx. Blunt force trauma from the outside, irritation by a medical device, a penetrating injury from a blade, or damage from surgery are all possible ways of temporarily or permanently damaging the structures in the larynx. Some important things to think about when you’re writing your laryngeal injury:
- Someone with a laryngeal injury will have a breathy, raspy, and/or quiet voice caused by limitation of airflow. This may not be evident unless the person is tired or has been speaking for some time. The person is unlikely slur words and will be understandable.
- If you just want someone to have difficulty speaking, don’t use a laryngeal injury. The person will have issues with speaking but they’re in serious danger of suffocating due to lack of airflow.
Most laryngeal injuries come from blunt trauma, such as smashing the neck on a steering wheel after a car accident. Those injuries can shatter the cartilage, collapsing the airway, or cause bleeding and swelling in the tissues of the larynx, also closing the airway. The good news is this is an excuse for an emergency tracheotomy. The bad news is the movies have lied to you about the effectiveness of pens in a pinch.
- Paralysis of the vocal cord is not just a speech problem. It’s a breathing problem. The vocal cords help with regulation of airflow. If they are damaged, people will have trouble breathing. It is also likely whatever caused the paralysis interferes with the function of the epiglottis. Prepare for lots of choking on food or even saliva if someone has bilateral paralysis.
- Endotracheal tubes used in artificial ventilation go through the larynx and irritate the structures inside. Long-term intubation through the mouth leads to damage to the vocal cords, either temporarily or permanently. This is one of the many reasons people who will be on a ventilator for a long time receive a tracheostomy: this will preserve vocal cord function for when the person is able to breathe on their own again.
Story idea: someone who has been in the ICU for over a week is recently taken off the ventilator. This person has difficulty speaking not only because their respiratory muscles are weak but also because their vocal cords are damaged. Lots of whispered, tiring conversations. They’re not going to be speaking for very long or very loudly.
- Unilateral paralysis of the vocal cord can be achieved by cutting one of the recurrent laryngeal nerves, a delicate structure that is damaged during throat surgeries. It is also possible to damage just this nerve with a sharp blade. Being stabbed in the throat to cause cord paralysis is not a remarkable story technique because it’s more likely the person will be stabbed in the throat and bleed out due to nicking the carotid or jugular.













