For needle procedures, a hollow cannula is inserted near the corner of the mouth. If the pain requires further evaluation, a consultation with a neurologist or a neurosurgeon may be recommended. Facial motor activity is often abnormal in neuropsychiatric conditions. Localizing a Lower Motor Neuron Cranial Nerve VII Lesion If the lesion is at the stylomastoid foramen termination of facial canal, where the facial nerve leaves skullall muscles of facial expression are paralyzed. It is passed through the cheek and into a hole in the skull to reach the trigeminal ganglion.
Although the exact cause of trigeminal neuralgia is not fully understood, a blood vessel is often found compressing the nerve.
What Causes Numbness on the Right Side of the Face?