Nothing. It is an automatic response to the tongue depressor.
depressor anguli oris depressor labii inferioris
If a tongue depressor was placed in your mouth, then your mouth had to be open in the first place.
Frowning
tongue depressor
Depressor anguli oris
True
Latissimus Dorsi and Poterior Deltoids
Tongue depressor
The functions of a tongue depressor is to keep the tongue down long enough to examine the throat area and glands
A tongue depressor.
they use a thermometer, stethoscope, tongue depressor, (etc).