Lower jaw neck diagrams4/9/2023 the level at which the vertebral artery enters the transverse foramen in the 6th cervical vertebra.the level at which the inferior thyroid artery enters and the middle thyroid vein leaves the thyroid gland.the junction of the pharynx with the oesophagus.the junction of the larynx with the trachea.Note that the lower border of the cricoid is an important level in the neck it corresponds not only to the level of the 6th cervical vertebra but also to: 186 Structures palpable on the anterior aspect of the neck, together with their corresponding vertebral levels. the rings of the trachea, over the 2nd and 3rd of which lies the isthmus of the thyroid gland (sometimes palpable) įig.the cricoid cartilage – continuous with the trachea at the level of C6.the cricothyroid ligament – important in cricothyroid puncture.the isthmus of the thyroid cartilage – at levels C4 and C5.the notch of the thyroid cartilage – at the level of C4.In the midline, from above down, can be felt ( Fig. an anterior portion – which includes the prevertebral musculature draped in prevertebral fascia, in front of which lies the centrally located visceral compartment this portion includes also the right and left carotid sheaths, the submandibular glands and the anterior cervical musculature.a posterior portion – comprising the cervical vertebral column, the cervical segment of the spinal cord and the postvertebral musculature.From a practical perspective, it is helpful to picture the neck as being made up of two parts: The thoracic duct will drain lymph from the left side of the face and neck while the right lymphatic duct will drain the lymph from the right side of the face and neck.The differential diagnosis of lumps in the neck and the effective clinical and surgical management of pathological lesions in the neck require a sound knowledge of the surgical anatomy of the head and neck. The lymph fluid in these lymph nodes will eventually drain into the central circulation via the right lymphatic duct and the thoracic duct. The lymphatic drainage of the inferior alveolar artery and its perfusion territory will drain toward the submental and submandibular lymph nodes. The branches of the inferior alveolar artery perfuse regions, including the chin, neck, and lower lip. The perfusion territory of the inferior alveolar artery includes the lower jaw gingivae and teeth. The inferior alveolar artery is the main blood supply to the mandible bone. The branches that arise from the inferior alveolar artery will travel with the corresponding nerve to perfuse the same structure as the nerve innervation. The inferior alveolar arteries are responsible for the direct perfusion of the lower jaw and the lower jaw's structures. The connection made with the submental artery will provide collateral blood to the skin and muscles on the inferior aspect of the chin. The anastomosis with the inferior labial artery will provide collateral blood to the lower lip, anterior chin, skin, and the muscles in that region. The inferior alveolar artery also forms anastomoses with the inferior labial artery and the submental artery. These arterial branches of the inferior alveolar will also perfuse their corresponding nerves. The mental artery is responsible for the perfusion of the anterior chin. The incisor arteries that branch from the inferior alveolar artery is responsible for perfusing the teeth, dental sockets, and the gingivae of the lower jaw. The lingual branch of the inferior alveolar artery perfuses the genioglossus muscle in the tongue. The mylohyoid branch of the inferior alveolar artery will descend toward the mylohyoid muscle and perfuse the mylohyoid muscle and the anterior muscle belly of the digastric muscle. Once the inferior alveolar artery reaches the mental foramen and exits, it becomes the mental artery this makes the inferior alveolar artery the main blood supply to the mandible bone. While the inferior alveolar artery traverses the mandibular foramen, it branches into the incisor arteries. Before the inferior alveolar artery enters the mandibular foramen, it will branch into the mylohyoid and lingual branch of the inferior alveolar artery. The course of the inferior alveolar artery is similar to the inferior alveolar nerve. The inferior alveolar artery is a small muscular artery that branches from the first portion of the maxillary artery. The maxillary artery is what branches into the inferior alveolar artery. The external carotid artery will terminate and become the superficial temporal artery and the maxillary artery. As the external carotid artery ascends the face, it will branch into six arteries: the superior thyroid artery, lingual artery, ascending pharyngeal artery, facial artery, occipital artery, and posterior auricular artery.
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