Muscle Movement
The most important aspect of each muscle is its movement. The size and shape is almost insignificant compared to its motion. But muscle movement isn't always clear; even with an abundance of literature and online resources, finding suitable references can be difficult.
This section identifies the muscles you need to build and provides additional information to aid in their development. It's also worth noting that this isn't an exhaustive list. We could have added other muscles that contribute to skin movement, but they have been excluded for practical purposes.
ORBICULARIS ORIS
Function: The king of speech, this sphincter muscle encircles the lips. Almost every muscle that contributes to facial motion is attached to this muscle. ...
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