CHRONIC BULBAR PALSY

The lesion is located in the medulla around the bulbar nuclei of last four cranial nerves. So there will be progressive weakness and wasting of the tongue, palate, pharynx, lips and larynx giving rise to dysarthria, dysphagia, aphonia and difficulty in coughing, breathing, chewing and talking etc. The tongue is so much atrophied that it may occupy one corner of the mouth. It will show fasciculation and wasting which are diagnostic signs of this disease. The mouth will remain full of saliva and often there will be secondary infection. This condition is also known as labioglossopharyngo-laryngeal paralysis. In this state the average life expectancy is about one and half years. In all these three types intellectual function, external ocular muscles and sphincters are not involved.

Lips are atrophic as the labial branches of the facial nerve course along the hypoglossal nerve which are also affected.

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