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VI. The Arteries. 3. The Arteries of the Head and Neck. a. The Common Carotid Artery. Gray, Henry. 1918. Anatomy of ... The thoracic portion of the left common carotid artery ascends from the arch of the aorta through the superior mediastinum to the level of the left sternoclavicular joint, where it is continuous with the cervical portion. The common carotid artery is contained in a sheath, which is derived from the deep cervical fascia and encloses also the internal jugular vein and vagus nerve, the vein lying lateral to the artery, and the nerve between the artery and vein, on a plane posterior to both. Behind, the artery is separated from the transverse processes of the cervical vertebræ; by the Longus colli and Longus capitis, the sympathetic trunk being interposed between it and the muscles. www.bartleby.com /107/143.html   (1067 words)

Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: Opus II: Cardiovascular System: Arteries: Head, ... The thymic artery usually arises from the anterior mediastinal branch of the internal thoracic, but it may also arise as a sizable branch of the ascending aorta or aortic arch, or from the brachiocephalic, common carotid, inferior thyroid, pericardiacophrenic, or internal thoracic directly. The superior thymic artery and the middle thymic artery were also abundant, being 33.7% (fetus) and 18.8% (fetus) and 32.6% (adult) and 14.3% (adult) in the two arteries respectively. Yamaski states that the proximal portion of this thymic artery may remain as the stem of the sternomastoid branch or as a lateral branch of the superior thyroid artery. www.anatomyatlases.org /AnatomicVariants/Cardiovascular/Text/Arteries/Thymic.shtml   (749 words)

eMedicine - Thyroid Anatomy : Article by David Lemaire, MD The thyroid ima is a single vessel, which originates, when present, from the aortic arch or the innominate artery and enters the thyroid gland at the inferior border of the isthmus. The inferior thyroid artery arises from the thyrocervical trunk, a branch of the subclavian artery. Mansberger AR Jr, Wei JP: Surgical embryology and anatomy of the thyroid and parathyroid glands. www.emedicine.com /ent/topic532.htm   (2190 words)

Reference.com/Encyclopedia/Thyroid The thyroid is one of the larger endocrine glands - 10-20 grams in adults- and butterfly-shaped: the wings correspond to the lobes and the body to the isthmus of the thyroid. The superior thyroid artery is the first branch of the external carotid, and supplies mostly the upper half of the thyroid gland, while the inferior thyroid artery is the major branch of the thyrocervical trunk, which comes off of the subclavian artery. A nodule or lobe of the thyroid is sometimes removed for biopsy or for the presence of an autonomously functioning adenoma causing hyperthyroidism. www.reference.com /browse/wiki/Thyroid   (2072 words)

External carotid artery - Wikipedia, the free encyclopedia The external carotid artery begins opposite the upper border of the thyroid cartilage, and, taking a slightly curved course, passes upward and forward, and then inclines backward to the space behind the neck of the mandible, where it divides into the superficial temporal and internal maxillary arteries. Medial to it are the hyoid bone, the wall of the pharynx, the superior laryngeal nerve, and a portion of the parotid gland. Posterior to it, near its origin, is the superior laryngeal nerve; and higher up, it is separated from the internal carotid by the Styloglossus and Stylopharyngeus, the glossopharyngeal nerve, the pharyngeal branch of the vagus, and part of the parotid gland. en.wikipedia.org /wiki/External_carotid_artery   (577 words)

VI. The Arteries. 3a. 2. The External Carotid Artery. Gray, Henry. 1918. Anatomy of the Human Body. The branches to the gland are generally two in number; one, the larger, supplies principally the anterior surface; on the isthmus of the gland it anastomoses with the corresponding artery of the opposite side: a second branch descends on the posterior surface of the gland and anastomoses with the inferior thyroid artery. alveolaris inferior; inferior dental artery) descends with the inferior alveolar nerve to the mandibular foramen on the medial surface of the ramus of the mandible. Crossing the under surface of the sphenoid the sphenopalatine artery ends on the nasal septum as the posterior septal branches; these anastomose with the ethmoidal arteries and the septal branch of the superior labial; one branch descends in a groove on the vomer to the incisive canal and anastomoses with the descending palatine artery. bartleby.com /107/144.html   (4437 words)

EHS: Chapter 128: Anatomy The superior parathyroid glands are derived from the fourth pharyngeal arches. The inferior thyroid artery is a branch of the thyrocervical trunk. The thyroid gland is firmly attached to the trachea by the middle layer of the deep cervical fascia. www3.us.elsevierhealth.com /Mosby/CDOnline/Cummings/Questions/chap128.html   (515 words)

Thyroid - Psychology Wiki - a Wikia wiki The thyroid is one of the larger endocrine glands - 10-20 grams in adults- and butterfly-shaped: the wings correspond to the lobes and the body to the isthmus of the thyroid. The superior thyroid artery is the first branch of the external carotid, and supplies mostly the upper half of the thyroid gland, while the inferior thyroid artery is the major branch of the thyrocervical trunk, which comes off of the subclavian artery. A nodule or lobe of the thyroid is sometimes removed for biopsy or for the presence of an autonomously functioning adenoma causing hyperthyroidism. psychology.wikia.com /wiki/Thyroid   (1706 words)

Anatomy You Know By Heart The middle meningeal artery is the principal artery of the calvaria and dura mater. Anterior ethmoidal carotid, lacrimal, vertebral, occipital, maxillary, and ascending pharyngeal arteries all have meningeal branches. Thyroid gland is supplied by 4 arteries (2 pairs superior and inferior thyroid) and drained by 6 veins (2 pairs of superior, middle, and inferior). student.ttuhsc.edu /medscbu/MyRock/knowgross.htm   (1699 words)

Section 2 Chapter 7 Thyroid and Parathyroid Procedures The thyroid is retracted anteriorly and medially and the carotid sheath laterally; this retraction places tension on the middle thyroid veins and helps expose the area posterolateral to the thyroid, where the parathyroid glands and the recurrent laryngeal nerves are situated. The superior thyroid artery and veins are identified by retracting the thyroid inferiorly and medially. Median sternotomy A median sternotomy is rarely necessary for removal of the thyroid gland because the blood supply to the thyroid gland, the thymus, and the lower parathyroid glands derives primarily from the inferior thyroid arteries in the neck. www.acssurgery.com /acsonline/chapters/ch0207.htm   (5464 words)

Non-neoplastic Diseases of the Thyroid Gland (Feb.1999) The superior thyroid artery is usually the first anterior branch of the external carotid artery, although it rarely is a direct branch from the common carotid artery just before the bifurcation into the external and internal carotid arteries (a rare exception to the rule that there are no branches of the common carotid artery). Accompanying the superior thyroid artery above the level of the superior pole of the gland is the external branch of the superior laryngeal nerve, the motor nerve to the cricothyroid muscle. Primary hypothyroidism is caused by the thyroid gland, secondary by the pituitary, tertiary by the hypothalamus and peripheral resistance is often due to a genetic abnormality in the c –erb A gene from chromosomes 17 or 3. www.utmb.edu /otoref/Grnds/Thyroid-9902/thyroid-9902.html   (4484 words)

Graves' - Thyroid and Skin The thyroid may be smooth, lobulated, or rarely nodular. It is commonly stated that the gland is not palpable in 1% of cases, either because the thyroid is actually smaller than ususal or because it is beneath the manubrium. The location of the thrill suggests that the larger thyroid vessels are chiefly responsible. www.thyroidmanager.org /Chapter10/10_thyroidandskin.htm   (1086 words)

Thyroid Cancer The inferior thyroid artery divides further into two branches: the upper branch supplies to the posterior aspect of the gland and the lower branch supplies to the lower pole of the gland. Nerve innervation of the thyroid gland is from the superior, middle, and inferior cervical sympathetic ganglia, which form the cardiac, and superior and inferior thyroid periarterial plexuses. The incidence of thyroid nodules in female to male is 6.5% to 1.5%. www.utmb.edu /otoref/Grnds/Thyroid-CA-021204/Thyroid-CA-021204.htm   (5499 words)

Thyroid at AllExperts In the fetus, at 3-4 weeks of gestation, the thyroid gland appears as an epithelial proliferation in the floor of the pharynx at the base of the tongue between the tuberculum impar and the copula at a point latter indicated by the foramen cecum. During migration, the thyroid remains connected to the tongue by a narrow canal, the thyroglossal duct. A large majority of the thyroid may be removed, a subtotal thyroidectomy, to treat the hyperthyroidism of Graves' disease, or to remove a goitre that is unsightly or impinges on vital structures. en.allexperts.com /e/t/th/thyroid.htm   (2135 words)

Resection of an Intrathoracic Thyroid Gland For an intrathoracic thyroid, surgical removal is indicated when the mass is large, when there is local compression of adjacent structures, and when there is a possibility of malignancy. Ectopic intrathoracic thyroid is a rare presentation of thyroid disease and of all mediastinal tumors [3]. This approach is adequate in the majority of cases, since the blood supply from the superior and inferior thyroid arteries originates in the neck [12]. www.ctsnet.org /sections/clinicalresources/clinicalcases/article-18.html   (1097 words)

The thyroid gland The inferior thyroid artery arises from the thyrocervical trunk. As the artery approaches the thyroid gland it crosses or is crossed by the recurrent laryngeal nerve. Lymphatic drainage of the thyroid is to the middle and inferior deep jugular nodes, and to the supraclavicular nodes. www.med.mun.ca /anatomyts/head/thyroid.htm   (763 words)

eMedicine - Complications of Thyroid Surgery : Article by Pramod K Sharma, MD Thyroid tissue in the region of the ligament of Berry is meticulously dissected of the trachea, carefully ligating traversing vessels; this exposes the RLN as it enters the larynx. The thyroid is attached to the trachea by thick connective tissue called the Berry ligament at the level of the second or third tracheal ring. Twenty-two percent of the superior parathyroid glands were on the posterior surface of the upper lobe of the thyroid. www.emedicine.com /ent/topic649.htm   (6870 words)

[No title] Contents ‑ Arteries: Carotid sheath with Common Carotid dividing into Internal and External Carotid arteries, numerous branches of External carotid; Veins: Internal Jugular vein; Nerves: Hypoglossal nerve and descending branch of Ansa Cervicalis, Accessory and Vagus nerves; Lymphatics: Deep Cervical chain of lymph nodes. Superior Thyroid artery ‑ accompanied by Superior Laryngeal nerve. Sympathetic trunk ‑ there are  three cervical ganglia (Superior, Middle, Inferior);  all 3 ganglia send gray rami to cervical spinal nerves; Superior ganglion sends postganglionic fibers to form a plexus on carotid arteries and their arterial branches  to be distributed to most of head;  (Snell Fig. musom.marshall.edu /anatomy/grosshom/z_trineck2.html   (467 words)

Aberrant Origin of the Superior Thyroid Artery and the Tracheoesophageal Branch from the Common Carotid Artery: A ... Aberrant Origin of the Superior Thyroid Artery and the Tracheoesophageal Branch from the Common Carotid Artery: A Source of Failure in Elastase-Induced Aneurysms in Rabbits -- Möller-Hartmann et al. of the superior thyroid arteries from the common carotid arteries The gross morphology of the arterial supply to the trachea, primary bronchi, and oesophagus of the rabbit. www.ajronline.org /cgi/content/full/181/3/739   (1535 words)

Committed to safety and excellence in minimally invasive endocrine surgery This sheath attaches the thyroid to the larynx and the trachea. The inferior thyroid artery is a branch of the thyrocervical trunk and it runs behind the gland to the level of the cricoid cartilage. The thyroid is derived from an epithelial proliferation of the floor of the pharynx. www.endocrinesurgeon.co.uk /thyroid/thyroid1-2.html   (748 words)

Neuromeningeal trunk Ascending pharyngeal artery, neuromeningeal trunk to vertebral artery Collateral circulation from the inferior thyroid artery supplies the superior thyroid artery which fills the external carotid retrograde. The external carotid artery is also receiving retrograde flow from a vertebral to occipital artery collateral. bubbasoft.org /carotid_collaterals/neuromeningeal_trunk.htm   (121 words)

The Thyroid Gland The gland is attached to the arch of the cricoid cartilage and to the oblique line of the thyroid cartilage. All the thyroid arteries anastomose with each other on or in the substance of the thyroid gland. It descends to the superior pole of the gland, pierces the pretracheal fascia, and then divides into two or three branches. download.videohelp.com /vitualis/med/thyroid_gland.htm   (386 words)

Thyroid Resource Page - tyroid The thyroid is one of the larger endocrine glands in the body. There are three main veins that drain the thyroid: the superior, middle and inferior thyroid veins. Nodules of the thyroid may require ultrasound to establish their nature, and fine needle aspiration may be performed. www.cydaily.com /Thyroid.html   (1586 words)

Iatrogenic Pseudoaneurysm of the Superior Thyroid Artery: Color Doppler Ultrasonographic Diagnosis and Treatment ... Iatrogenic Pseudoaneurysm of the Superior Thyroid Artery: Color Doppler Ultrasonographic Diagnosis and Treatment Approach -- Celik et al. Iatrogenic pseudoaneurysm of the STA in a 39-year-old female patient. pseudoaneurysm of the STA in a patient with dorsal pharyngeal www.jultrasoundmed.org /cgi/content/full/23/12/1675   (1075 words)

Prelab Images - Anterior Triangle of the Neck The superior thyroid vein is also shown in plate 70 coming from the internal jugular vein. Plates 71 and 72 show external branch of the superior laryngeal nerve from a posterior view running near the superior thyroid artery and innervating the inferior pharyngeal constrictor muscle before moving to the front of the larynx to innervate the cricothyroid muscle. The thyroidea ima artery is not pictured in plate 70, but in 10% of people it runs up from the aortic arch or brachiocephalic artery to the isthmus of the thyroid gland. www.med.umich.edu /lrc/coursepages/M1/anatomy/html/nervous_system/antneck_pre.html   (1187 words)

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