What happens if the chorda tympani is damaged?
Chorda tympani damage may cause: Reduced saliva secretion on the affected side. Loss of taste to the front two-thirds of the tongue. Increased pain response in the tongue.
Is the chorda tympani a nerve?
The chorda tympani nerve is a branch of the facial nerve that innervates taste to the anterior two thirds of the tongue.
How do you test for lingual nerve damage?
A method for assessing lingual sensation is described, comprising sensory testing, using touch and moving two-point discrimination and patient subjective reporting. The clinical application is seen to be the evaluation of lingual nerve injury consequent upon lower third molar surgery.
Where does chorda tympani join lingual nerve?
the chorda tympani exits the petrotympanic fissure and joins the lingual nerve approximately 2 cm below the skull base.
How do you test for chorda tympani?
The accepted criterion of a functioning chorda tympani nerve is the ability to perceive taste on roughly the anterior two-thirds of the tongue on the corresponding side. In the process of testing, a patient, whose taste is found to be absent by one examiner, may have normal or subnormal taste when tested by another.
What CN is the chorda tympani?
Three cranial nerves carry taste information centrally: CN VII (chorda tympani and greater superficial petrosal branches), CN IX (lingual branch), and CN X (superior laryngeal branch).
Where do the chorda tympani joins the lingual nerve?
How long does it take for lingual nerve to heal?
The good news is that a majority of lingual nerve injuries are temporary. After eight weeks, approximately 90 percent of the injuries heal on their own. That’s so encouraging! If the injury lasts longer than six months, the damage, unfortunately, is probably permanent.
What is the chorda tympani branch of?
The chorda tympani is a branch of the facial nerve, the facial nerve is the nerve of the second arch. The chorda tympani carries taste fibres from the front part of tongue, a first arch derivative, therefore the chorda tympani is the pretrematic branch of the facial nerve.