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The nasolabial folds, commonly known as "smile lines" [1] or "laugh lines", [2] [self-published source] are facial features. They are the two skin folds that run from each side of the nose to the corners of the mouth. They are defined by facial structures that support the buccal fat pad. [3] They separate the cheeks from the upper lip.
Facial expression is the motion and positioning of the muscles beneath the skin of the face. These movements convey the emotional state of an individual to observers and are a form of nonverbal communication.
Surface anatomy, or superficial anatomy, is the study of anatomical landmarks that can be identified readily from the contours or other reference points on the surface of the body. [1] It is important in human anatomy: with knowledge of superficial anatomy, physicians gauge the position and anatomy of deeper structures.
A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a Duchenne smile. Among humans, a smile expresses delight, sociability, happiness, joy, or amusement.
Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures that can be seen by unaided vision. Microscopic anatomy is the study of minute anatomical structures assisted with microscopes, and includes histology (the study of the organization of tissues), and cytology (the study of ...
Dental anatomy is a field of anatomy dedicated to the study of human tooth structures. The development, appearance, and classification of teeth fall within its purview. The development, appearance, and classification of teeth fall within its purview.
Experts say certain red flags can mean a bigger health issue is at play — for example, episodes of cold hands that are frequent, not easily reversible or are new in those ages 30 years and above ...
the sincere and involuntary Duchenne smile: contraction of zygomatic major and inferior part of orbicularis oculi. The FACS is designed to be self-instructional. People can learn the technique from a number of sources including manuals and workshops, [ 7 ] and obtain certification through testing.