the vagina plasmid
The muscle used to smile is called the zygomaticus major. When this muscle contracts, it pulls the corners of the mouth upward, creating a smile. This muscle is essential for expressing happiness because it is a key component of a genuine smile, which is often associated with positive emotions and feelings of joy.
Zygomaticus
orbicularis oris
The zygomaticus major muscle is the primary muscle responsible for facial expressions such as smiling. When this muscle contracts, it pulls the corners of the mouth upward, creating the smile.
The zygomaticus muscle is responsible for elevating the corners of the mouth and lips.
according to my anatomy and physiology teacher when you frown you use your facial muscles the specific types i never learned.
zygomaticus - It raises the lateral corners of the mouth upward (called the smiling muscle)
muscle
Botox actually paralyzes the muscle that it is injected into. If you ask the person to smile, they will not be able to use that muscle. Great care has to be taken as this is the deadliest toxin known.
The synergist to the smiling muscle (zygomaticus major) is the orbicularis oculi muscle, which is responsible for the contraction around the eyes and contributes to the overall expression of a smile.
According to snopes.com, there has been no agreement as to how many muscles it takes to smile, as there is so much variation surrounding what defines a smile.
It may take up to 100 times more energy to chew than when you smile.