Features of facial nerve palsy due to upper motor neuron disease | AIIMS MCQs for PG Entrance

All of the following are features of facial nerve palsy due to upper motor neuron disease except

a) A central lesion that causes partial paralysis of the facial muscles
b) The lower facial muscles, contra lateral to the lesion, are paralysed
c) The blink reflex and movement of forehead muscles unaffected
d) None of the above

Ans D..

     Characteristics of upper motor neurone disease

• A central lesion that causes partial paralysis of the facial muscles
• The lower facial muscles, contralateral to the lesion, are paralysed
• The orbicularis oculi and frontalis muscles, which receive bilateral cortical fibres, have limited function
• The blink reflex and movement of forehead muscles unaffected