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The facial muscles are just under the skin (subcutaneous) muscles that control facial expression. They generally originate from the surface of the skull bone (rarely the fascia), and insert on the skin of the face. When they contract, the skin moves. These muscles also cause wrinkles at right angles to the muscles’ action line. [2]
A diagram detailing human facial muscles, including the zygomaticus major (red), which is contained within the cheeks and is integral to the action of smiling.
Anatomy figure: 23:02-03 at Human Anatomy Online, SUNY Downstate Medical Center "Anatomy diagram: 25420.000-1". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2015-02-26. Facial Muscles - BBC Picture of the circular-shaped muscle; Facial Muscles - BBC (Flash) Animation of movements of the muscle
The head rests on the top part of the vertebral column, with the skull joining at C1 (the first cervical vertebra known as the atlas).The skeletal section of the head and neck forms the top part of the axial skeleton and is made up of the skull, hyoid bone, auditory ossicles, and cervical spine.
Facial muscles in humans allow expression of emotions. [4] The face is itself a highly sensitive region of the human body and its expression may change when the brain is stimulated by any of the many human senses, such as touch, temperature, smell, taste, hearing, movement, hunger, or visual stimuli. [5]
It is important in human anatomy: with knowledge of superficial anatomy, physicians gauge the position and anatomy of deeper structures. Common names of parts of the human body, from top to bottom: Head – face – forehead – jaw – cheek – chin; Neck – shoulder; Arm – elbow – wrist – hand – finger – thumb; Spine – chest
The muscle which can 'cancel' or to some degree reverse the action of the muscle. Muscle synergies are noted in parentheses when relevant. O (Occurrences) Number of times that the named muscle row occurs in a standard human body. Here it may also be denoted when a given muscles only occurs in a male or a female body.
The muscles of the forehead help to form facial expressions. There are four basic motions, which can occur individually or in combination to form different expressions. The occipitofrontalis muscles can raise the eyebrows, either together or individually, forming expressions of surprise and quizzicality.
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