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The platysma muscle lies just deep to the subcutaneous fascia and fat. [1] [3] It covers many structures found deeper in the neck, such as the external carotid artery, the external jugular vein, [4] the parotid gland, [4] the lesser occipital nerve, [4] the great auricular nerve, [4] and the marginal mandibular branch of the facial nerve.
platysma: 2 2 temporalis: head, coronal plane (left/right) temporal lines on parietal bone of skull: coronoid process of mandible: deep temporal arteries: deep temporal nerves from mandibular nerve [CNV 3] elevates and retracts mandible (closes mouth) platysma: 2 1 pterygoid, lateral: head, coronal plane (left/right) greater wing of sphenoid ...
The cervical branch of the facial nerve is a branch of the facial nerve (VII). It runs forward beneath the platysma muscle, and forms a series of arches across the side of the neck over the suprahyoid region.
[citation needed] It becomes continuous with the platysma muscle inferiorly (inferior to the inferior border of the mandible), and indistinct laterally (inferior to the zygomatic arch). Anteromedially, it blends with the epimysium of some facial muscles; [ 3 ] a link between facial muscles and the skin of the face is thereby established ...
The platysma is supplied by the facial nerve. Although it is mostly in the neck and can be grouped with the neck muscles by location, it can be considered a muscle of facial expression due to its common nerve supply.
The great auricular nerve is a large trunk that ascends almost vertically over the sternocleidomastoid. [2] It winds around the posterior border of the sternocleidomastoid muscle, then perforates the deep fascia before ascending alongside the external jugular vein upon that sternocleidomastoid muscle beneath the platysma muscle to the parotid gland. [1]
Ileum, caecum and colon of rabbit, showing Appendix vermiformis on fully functional caecum The human vermiform appendix on the vestigial caecum. The appendix was once believed to be a vestige of a redundant organ that in ancestral species had digestive functions, much as it still does in extant species in which intestinal flora hydrolyze cellulose and similar indigestible plant materials. [10]
The buccal space (also termed the buccinator space) is a fascial space of the head and neck (sometimes also termed fascial tissue spaces or tissue spaces). It is a potential space in the cheek, and is paired on each side.