The muscles that are called grinning muscles are the zygomaticus major muscle which is responsible for allowing us to smile and works in conjunction with up to 43 other facial muscles to provide us with a wide array of smiles.
The 3 facial muscles are the Orbicularis oris muscle, Depressor anguli oris muscle and the Buccinator muscle.
Other main facial muscles are the levator labii superioris, Mentalis, Risorius , Masseter, Corrugator supercilii muscle, Zygomaticus minor muscle, Depressor septi nasi muscle, depressor labii inferioris muscle, procerus muscle, Temporalis muscle, Occipitofrontalis muscle, Nasalis muscle, nasal muscles, lateral pterygoid muscle and the Epicranial muscles.
The muscle that is called the kissing muscle is the orbicularis oris muscle which is a muscle that surrounds the mouth and forms the lips.
The orbicularis oris muscle is often called the kissing muscle as it is what enables you to pucker.
Orbicularis oris muscle, also known as musculus orbicularis oris is a complex, multi-layered muscle which attaches through a thin, superficial musculoaponeurotic system to the dermis of the upper lip and lower lip and serves as an attachment site for many other facial muscles around the oral region.
In common language, the orbicularis oris is often referred to as 'the kissing muscle.
It allows for facial expression, and more specifically, it is responsible for puckering the lips.
While this action is a requirement for kissing, the puckering action is used in a number of other ways.
A sphincter muscle closes circumferentially.
Therefore, the orbicularis oculi muscle plays a vital role in facial expression and various ocular reflexes such as frowning, squinting, and eye closure.
There is a palpebral portion that can be contracted actively and passively.
Kissing can involve a variety of different facial muscles, with the orbicularis oris being the main skeletal muscle involved.
Simple kisses use as few as 2 muscles and burn only 2 to 3 calories, whereas passionate kissing can involve as many as 23 to 34 facial muscles and 112 postural muscles.
The orbicularis oris muscle is supplied by the buccal and mandibular branches of the facial nerve.