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The deep cervical fascia (or fascia colli in older texts) lies under cover of the Platysma, and invests the neck; it also forms sheaths for the carotid vessels, and for the structures situated in front of the vertebral column. Its attachment to the hyoid bone prevents the formation of a dewlap.〔Anatomy & Physiology, 8th Edition, McGraw-Hill Co., 2008.〕 The investing portion of the fascia is attached behind to the ligamentum nuchæ and to the spinous process of the seventh cervical vertebra. The ''alar fascia'' is a portion of the ''deep cervical fascia''. ==Divisions== The deep cervical fascia is often divided into a superficial, middle, and deep layer. The superficial layer envelopes the trapezius, sternocleidomastoid, and muscles of facial expression. It also contains the submandibular and parotid salivary gland as well as the muscles of mastication (the masseter, pterygoid, and temporalis muscles). The middle layer envelopes the strap muscles (sternohyoid, sternothyroid, thyrohyoid, and omohyoid muscles). It also surrounds the pharynx, larynx, trachea, esophagus, thyroid, parathyroids, buccinators, and constrictor muscles of the pharynx. The deep layer is the pre vertebral fascial layer and surrounds the paraspinous muscles and cervical vertebrae. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Deep cervical fascia」の詳細全文を読む スポンサード リンク
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