Why do my lips quiver involuntarily when I am trying incredibly hard not to cry?
1. Introduction Involuntary lip quivering when trying not to cry is the result of a profound neurological conflict between the autonomic nervous system, which drives the emotional crying reflex, and the somatic nervous system, which attempts to consciously suppress it. This simultaneous activation and inhibition of the mentalis and orbicularis oris muscles surrounding the mouth … Read more