... basically it is the "levator labii superioris muscle". -roelbondoc
Facial muscles are usually employed to display surprise.
Facial muscles, lips, cheeks, throat
frownin
Yes, it has to do with facial muscles
They are facial muscles innervated by the facial nerve that, among other things, control facial expression.
Facial synkinesis is the involuntary movement of facial muscles that accompanies purposeful movement of some other set of muscles.
your facial muscles!
the muscles in our face are necessary so we can smile and make facial expressions
There are 33 muscles in a human face. And no, it doesn't take more muscles to frown than to smile.
The facial muscles are innervated by facial nerve (cranial nerve VII). In contrast, the nearby masticatory muscles are innervated by the mandibular nerve, a branch of thetrigeminal nerve (V).
14 muscles for smiling, and 35 muscles for madness
It makes no sense because the facial muscles are innervated by the facial nerve. And this nerve comes off the brain stem.