|
| |
a thyreoidea superior
|
| |
144
|
| |
552
|
| |
Gray507png
|
| |
Superficial dissection of the right side of the neck, showing the Carotid and Subclavian arteries
|
| |
|
| |
|
| |
External Carotid Artery
|
| |
Hyoid, Superior Laryngeal,Sternocleidomastoid, Cricothyroid
|
| |
|
| |
|
| |
|
| |
|
The arises from the
External Carotid Artery just below the level of the greater cornu of the
Hyoid Bone and ends in the
Thyroid Gland .
From its origin under the anterior border of the
Sternocleidomastoideus it runs upward and forward for a short distance in the
Carotid Triangle , where it is covered by the skin,
Platysma , and fascia; it then arches downward beneath the
Omohyoideus ,
Sternohyoideus , and
Sternothyreoideus .
To its medial side are the
Constrictor Pharyngis Inferior and the external branch of the
Superior Laryngeal Nerve .
It distributes twigs to the adjacent muscles, and numerous branches to the thyroid gland, anastomosing with its fellow of the opposite side, and with the
Inferior Thyroid Arteries .
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.
Besides the arteries distributed to the muscles and to the thyroid gland, the branches of the superior thyroid are:
- Hyoid
- Superior Laryngeal
- Sternocleidomastoid
- Cricothyroid
The Hyoid Branch (ramus hyoideus; infrahyoid branch) is small and runs along the lower border of the hyoid bone beneath the Thyreohyoideus and anastomoses with the vessel of the opposite side.
The Sternocleidomastoid Branch (ramus sternocleidomastoideus; sternomastoid branch) runs downward and lateralward across the sheath of the common carotid artery, and supplies the Sternocleidomastoideus and neighboring muscles and integument; it frequently arises as a separate branch from the external carotid.
The Superior Laryngeal Artery (a. laryngea superior), larger than either of the preceding, accompanies the internal laryngeal branch of the superior laryngeal nerve, beneath the
Thyreohyoideus ; it pierces the
Hyothyroid Membrane , and supplies the muscles, mucous membrane, and glands of the
Larynx , anastomosing with the branch from the opposite side.
The Cricothyroid Branch (ramus cricothyreoideus) is small and runs transversely across the
Cricothyroid Membrane , communicating with the artery of the opposite side.
