特发性面神经麻痹bellpalsy ppt课件.pptVIP

Bell palsy ------Mark Bell palsy Which side of the face have problem? Idiopathic facial palsy Bell palsy You wake up one morning, and your face feels stiff，when you look in a mirror, half your face appears to droop. You can only manage half a smile, your eye is dripping tears and doesnt want to close. What in the world is going on? Bell palsy No silly it’s Bell Palsy Scottish anatomist, surgeon, and physiologist, born November 1774; died 28th April, 1842. Who is Bell? Charles Bell Well known for his studies on the nervous system and the brain. In the 19th century he discovered that lesions of the 7th cranial nerve causes facial paralysis. Bell palsy What nerve was that again? The 7th cranial nerve is paired with the structure that travels through a narrow, bony canal (called the Fallopian canal) in the skull beneath the ear Bell palsy The nerve is mostly encased in this bony shell. Bell palsy Facial Nerve Each nerve controls: Eye blinking and closing Facial expressions Smiling and frowning Tear glands(腺体) Taste sensations Function Bell palsy Varies from person to person Comes on suddenly Mild to total paralysis Weakness, twitching (抽搐) on one of both sides of the face Facial and eyelid droop Drooling Dryness of eye or mouth Impairment of taste Excessive tearing of eye Symptom 1/2 Bell palsy Pain in behind the ear Ringing in one or both ears Impaired speech Difficulty eating and drinking Symptom 2/2 Bell palsy What Causes this? It occurs when the facial nerve is swollen