Facial Nerve || Cranial Nerve 7 pathway, Branches, Bell's Palsy скачать в хорошем качестве

Facial Nerve || Cranial Nerve 7 pathway, Branches, Bell's Palsy

Facial nerve palsy, also known as Bell's palsy, is a condition characterized by sudden, unilateral paralysis or weakness of the muscles of the face. It is the most common cause of acute facial paralysis and is caused by damage or dysfunction of the seventh cranial nerve, also called the facial nerve or nervus facialis. The key points about facial nerve palsy and Bell's palsy are: 1. Etiology: The most common cause is idiopathic, meaning the exact cause is unknown. However, it is often associated with viral infections, particularly the herpes simplex virus. Other potential causes include trauma, tumors, Lyme disease, and autoimmune disorders. 2. Anatomy and Pathophysiology: The facial nerve originates in the brainstem and travels through the temporal bone, innervating the muscles of facial expression. Damage or dysfunction of the nerve at any point along its course can lead to paralysis or weakness of the ipsilateral side of the face. 3. Symptoms: The main symptom is sudden, unilateral facial paralysis or weakness, often accompanied by pain behind the ear, altered taste, and hypersensitivity to sound. The inability to close the eye on the affected side can lead to corneal drying and irritation. 4. Diagnosis: Diagnosis is primarily clinical, based on the characteristic presentation. Additional tests such as imaging or electrodiagnostic studies may be used to rule out other causes. 5. Treatment: Treatment typically involves a combination of corticosteroids to reduce inflammation, eye protection, and physical therapy. Most patients recover fully within 2-6 months, but a small percentage may experience persistent facial weakness or synkinesis (abnormal muscle co-contraction). 6. Prognosis: The prognosis for Bell's palsy is generally good, with most patients experiencing complete or near-complete recovery of facial function. However, the condition can be distressing and have a significant impact on a person's quality of life during the acute phase. In summary, facial nerve palsy, or Bell's palsy, is a common and often idiopathic condition characterized by sudden, unilateral facial paralysis or weakness. Prompt recognition and appropriate management are crucial to optimize recovery and prevent complications. Citations: [1] https://eyewiki.aao.org/Facial_Nerve_... [2] https://teachmeanatomy.info/head/cran... [3] https://www.msdmanuals.com/profession... [4] https://www.hopkinsmedicine.org/healt... [5] https://www.physio-pedia.com/Facial_P... Time Chapters 7:00 Intrapontine Course of facial nerve 8 : 13 Course through posterior cranial fossa 10 : 43 Course through facail canal 15 : 24 Branches arises in facial canal 16 : 29 Branches after leaving stylomastoid foramen 22 : 53 Facial nerve palsy