Muscle and Motion mastered this factor, bolstering its professional credibility. A vital facet of these functions is access to consistently accurate material. Their material strongly bolsters work I do as an educator supporting clients, whether in expert witness activity, training client associates or in consulting work-research. My search objective required a format to positively impact injury risk control in both industry and sport. The search concluded in the form of Muscle and Motion’s team and their stellar products. These facial muscles located in the deepest layer are the only muscles that are innervated on their superficial parts.As a board-certified ergonomist specializing in the discipline 42 years, I had searched long for an accurate, advanced educational format that could be effective and usable at all levels of an enterprise. Therefore, the surgical incision done to the superficial part of these muscles during facial and plastic surgeries will not damage the innervation.Įvery surgeon needs to remember the following muscles of facial expression - buccinator, mentalis and levator anguli oris muscles. This cranial nerve innervates only their deep parts. Deepest layer - contains the mentalis, buccinator and levator anguli oris.Īll facial muscles are innervated by branches of the facial nerve (CN VII).Third layer - consists of the levator labii superioris and orbicularis oris.Second layer (beneath the superficial one) - contains the platysma, risorius, zygomaticus major, deep part of the zygomaticus minor and levator labii superioris alaeque nasi.First layer (most superficial) - includes the orbicularis oculi, depressor anguli oris and superficial part of the zygomaticus minor.Auricularis posterior - draws the auricle backward.Īccording to the level of depth and muscle origin, the muscles of facial expression can be divided into four following groups:.Auricularis superior - pulls the auricle upward.Auricularis anterior - draws the auricle upward and forward.Extrinsic auricular muscles are considered facial muscles, and they include: They can be subdivided into two groups - intrinsic (muscles of the auricle) and extrinsic (around the ear). Auricular muscles - ear muscles that have a little functional significance. Temporo-parietalis - raises the ear and temple.ĥ.Occipitofrontalis - moves the scalp and forehead backward and forward, lifts the eyebrows and forms horizontal folds in the skin of the forehead.Epicranial muscles - muscles that cover upper parts of the skull:

One of the ways is to divide the muscles of facial expression into five major groups, depending on their location.ġ. The facial muscles can be classified in various ways. In addition, muscles around the mouth participate in sound production and food consumption. Muscles around the eyes also have a protective function for the structures located within the orbit. Through these movements, the expression of various emotions is possible. Muscles of the face act as sphincters - they take part in the closing and widening of the main orifices of the face. The primary function of all facial muscles is to provide voluntary and involuntary movements of facial skin folds, ensuring different facial expressions.

Essential anatomy app select muscles