Bell's Palsy (Hindi)/ Facial Palsy/ Upper and Lower Motor Neuron Facial Palsy/ Central Facial Palsy

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Link of other videos related to facial nerve:

Bell's Palsy / Facial Palsy/ Upper and Lower Motor Neuron Facial Palsy/ Central Facial Palsy
https://youtu.be/mGS2Hgv3eHw

Facial Nerve - Functional Components, Course & Branches
https://youtu.be/yhi0HGcqges
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Bell's palsy (Upper and Lower motor neuron facial palsy/ Central facial palsy)

Bell's palsy is the most common cause of one-sided facial nerve paralysis (70%). It is named after Scottish surgeon Charles Bell (1774–1842), who first described the connection of the facial nerve to the condition.
It is lower motor neuron type paralysis of facial muscles due to compression of facial
nerve in the facial canal near stylomastoid foramen. The exact etiology is not known but it is probably due to viral infection.
Characteristic Features on the Side of Paralysis
1. Facial asymmetry (affected side is drawn to the healthy side)—due to unopposed action of muscles of normal side.
2. Loss of horizontal wrinkles on forehead—due to paralysis of occipitofrontalis muscle.
3. Widening of palpebral fi ssure and inability to close the eye—due to paralysis of orbicularis oculi.
4. Tears flow down from the eye (epiphora)—due to paralysis of the lower part of the orbicularis oculi.
5. Sagging of the angle of the mouth towards the affected side and inability of the angle of the mouth to move upwards and laterally during laughing—due to paralysis
of zygomaticus major.
6. Loss of nasolabial furrow—due to paralysis of levator labii superioris alaeque nasi.
7. Accumulation of food into the vestibule of the mouth— due to paralysis of buccinator muscle.
8. Dribbling of saliva from the angle of the mouth—due to paralysis of orbicularis oris.
9. Loss of resistance when one presses cheek with inflated vestibule and air leaks out from between the lips—due to paralysis of buccinator muscle.

A supranuclear lesion (i.e., in hemiplegia) spares the upper part of the face because nuclear fibres supplying the muscles of the upper part of the face are innervated by the corticonuclear fibres of both the cerebral hemispheres. In the supranuclear lesion, only lower half of the face on the opposite side is paralyzed.
All infranuclear lesions involve whole of the face on the same side.

The cause of Bell's palsy is unknown.The condition normally gets better by itself with most achieving normal or near-normal function. Corticosteroids have been found to improve outcomes, while antiviral medications may be of a small additional benefit.The eye should be protected from drying up with the use of eye drops or an eyepatch.Surgery is generally not recommended. Often signs of improvement begin within 14 days, with complete recovery within six months.
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Dr. Ankit Jain
MBBS, MS

Видео Bell's Palsy (Hindi)/ Facial Palsy/ Upper and Lower Motor Neuron Facial Palsy/ Central Facial Palsy канала Smart Med Learn Dr. Ankit Jain