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The depressor anguli oris arises from the lateral surface of the mandible. [1] Its fibers then converge. It is inserted by a narrow fasciculus into the angle of the mouth. [1] At its origin, it is continuous with the platysma muscle, and at its insertion with the orbicularis oris muscle and risorius muscle.
In humans, the mandible, or lower jaw, is connected to the temporal bone of the skull via the temporomandibular joint. This is an extremely complex joint which permits movement in all planes. The muscles of mastication originate on the skull and insert into the mandible, thereby allowing for jaw movements during contraction.
fascia over lower part of nasal bone: skin of lower part of forehead between eyebrows: facial artery: facial nerve [CNVII], buccal branch: draws down medial angle of eyebrow (giving expressions of frowning) 2 1 depressor septi nasi: head, nose (left/right) incisive fossa of maxilla: nasal septum and back part of alar part of nasalis: superior ...
Part of a series of lists about: ... Depression, in an anatomical ... mandible. Lateral pterygoid muscle; lower lip. Depressor labii inferioris muscle;
The depressor labii inferioris muscle helps to depress and everts the lower lip. [1] It is the most important of the muscles of the lower lip for this function. [1] It is an antagonist of the orbicularis oris muscle. [1] It is needed to expose the mandibular (lower) teeth during smiling. [1]
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. The skull can be further subdivided into:
Beyond our joints and muscles simply getting older, here is a closer look at the most common reasons for your body aches, why your body responds with pain in the first place, and how to find ...
The platysma muscle is a broad sheet of muscle arising from the fascia covering the upper parts of the pectoralis major muscle and deltoid muscle. Its fibers cross the clavicle, and proceed obliquely upward and medially along the side of the neck. This leaves the inferior part of the neck in the midline deficient of significant muscle cover. [1]