 Another facial nerve disorder is aberrant regeneration of the facial nerve. In this particular example, it's after trauma. Now watch as the patient closes her eyes gently, you can see contraction around the mouth on the right. And as well, I think you can see a dimple that will form on the right also. Look just outside the corner of the mouth. See that dimple? And as well, you can see contraction around the mouth with closure of the eyes. This is due to synchinesis of the peripheral branches of the facial nerve. Here it's obvious with rapid eye blinking. There's an aberrant response. This is similar to the examples we'd seen earlier with aberrant regeneration of the third nerve. However, in these examples, there's a miswiring of the peripheral branches of the seventh nerve. Facial movements are full to voluntary contraction. Here, for example, and she puckers symmetrically. And she smiles symmetrically. You can also see she raises her eyebrows symmetrically. Here's another example of a congenital aberrant regeneration of the seventh nerve. And I think you can notice the shadow of the eye blink. And look at that contraction around the nose. That's another synkinetic response. So here's an example of a congenital as opposed to a acquired cause for a aberrant regeneration of the seventh nerve.