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The superior thyroid artery is typically the first branch of the external carotid artery. Most of its flow directed into the thyroid bed, with a characteristic thyroid blush on catheter angiography.It is very often seen on a (well-performed) CTA.A superior laryngeal branch often arises from the superior thyroid artery.Penetrating the thyrohyopid membrane along with the superior laryngeal nerve of the vagus nerve, it supplies stuctures of the larynx and hypopharynx.ost of its flow directed into the thyroid bed, with a characteristic thyroid blush on catheter angiography. It is very often seen on a (well-performed) CTA. A superior laryngeal branch often arises from the superior thyroid artery.
In the neck and head exterior to the skull, the external carotid artery provides blood flow to the skin, muscles, and organs. Several major arteries-including the facial, superficial temporal, and occipital arteries-branch off from the external carotid to provide blood to the many superficial structures of the head.Three pairs of major veins return deoxygenated blood from the tissues of the head and neck to the heart.The left and right vertebral veins descend through the transverse foramina of the cervical vertebrae to drain blood from the spinal cord, cervical vertebrae, and muscles of the neck.n the neck and head exterior to the skull, the external carotid artery provides blood flow to the skin, muscles, and organs. Several major arteries-including the facial, superficial temporal, and occipital arteries-branch off from the external carotid to provide blood to the many superficial structures of the head.