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Nerve to Tensor Veli Palatini

nervus musculi tensoris veli palatini

The nerve to tensor veli palatini is a branch of the medial pterygoid nerve from the mandibular division (V3) of the trigeminal nerve, supplying motor innervation to the tensor veli palatini muscle (the only palatal muscle not supplied by the vagus nerve via the pharyngeal plexus). The tensor veli palatini opens the Eustachian tube during swallowing and yawning by pulling the tube's cartilaginous wall open.

Region: Head & Skull

Clinical Relevance

Clinical Notes

The nerve to tensor veli palatini is relevant in palatal cleft repair and Eustachian tube dysfunction. In cleft palate, the tensor veli palatini muscle is abnormally oriented, inserting into the palatal aponeurosis laterally rather than crossing the hamulus to open the Eustachian tube; the associated Eustachian tube dysfunction produces recurrent middle ear effusion and conductive hearing loss in nearly all cleft palate children. Re-orientation of the tensor veli palatini during cleft repair is debated as a method of improving Eustachian tube function.

Pathology

Common Injuries & Conditions

Tensor Veli Palatini Dysfunction in Cleft Palate

Abnormal tensor veli palatini orientation in cleft palate impairs its Eustachian tube-opening function, producing universal otitis media with effusion requiring grommets in nearly all cleft palate children; functional palate repair attempts to restore the tensor's velar attachment, though its effect on Eustachian tube function remains debated.