LMN type Facial palsies -a) Bell’s palsy most commonb) Cornea should be protectedc) Unilateral paralysis is seen in Mobius syndromed) Prognosis affected before repeated electric stimulation

**Core Concept**
Lower Motor Neuron (LMN) type facial palsies result from a lesion affecting the facial nerve or its nucleus, leading to weakness or paralysis of the facial muscles on one side of the face. This condition can be caused by various factors, including trauma, infections, tumors, or vascular disorders.

**Why the Correct Answer is Right**
Bell's palsy is the most common cause of LMN type facial palsy, accounting for approximately 70% of cases. It is characterized by an idiopathic, unilateral, lower motor neuron lesion of the facial nerve. The facial nerve is responsible for controlling the muscles of facial expression, and damage to this nerve can lead to weakness or paralysis of the affected side of the face. The cornea should be protected in cases of facial palsy due to the risk of exposure keratopathy, which can lead to corneal ulcers and vision loss.

**Why Each Wrong Option is Incorrect**
**Option A:** Bell's palsy is indeed the most common cause of LMN type facial palsy, but the other options are incorrect.
**Option B:** While cornea protection is crucial in facial palsy, this statement is not specific to LMN type facial palsies and is therefore incorrect.
**Option C:** Mobius syndrome is a rare congenital disorder characterized by bilateral facial palsy and impaired eye movements, but it is not the correct answer because it is not specific to LMN type facial palsies.
**Option D:** Repeated electric stimulation can actually improve the prognosis in cases of facial palsy by promoting nerve regeneration and improving muscle function.

**Clinical Pearl / High-Yield Fact**
In cases of facial palsy, it is essential to protect the cornea and assess for exposure keratopathy, which can lead to vision loss if left untreated. This can be achieved by using eye drops, taping the eyelid shut, or using a corneal protector.

**Correct Answer:** A. Bell's palsy is the most common cause of LMN type facial palsy.