Anatomical terminology. The superior intercostal veins are two veins that drain the 2nd, 3rd, and 4th intercostal spaces, one vein for each side of the body. Where is the superior intercostal vein located?
Gross anatomy The left superior intercostal vein forms by the union of the 2nd to 4th left posterior intercostal veins. It courses superiorly to the left of the midline, arches posteriorly lateral to the aortic arch to drain into the left brachiocephalic vein.
What does the superior intercostal vein drain into?
The right superior intercostal vein drains the upper two to three intercostal spaces and can empty into either the azygos or the right brachiocephalic vein. Other tributaries of the azygos vein include esophageal, bronchial, mediastinal, and pericardial veins. What is the supreme intercostal artery?
The supreme intercostal arteries, or superior intercostal arteries, are formed as a direct result of the embryological development of the intersegmental arteries. These arteries are paired structures of the upper thorax which normally form to provide blood flow to the first and second posterior intercostal arteries.
What is Hemiazygos vein?
Medical Definition of hemiazygos vein : a vein that receives blood from the lower half of the left thoracic wall and the left abdominal wall, ascends along the left side of the spinal column, and empties into the azygos vein near the middle of the thorax. Where is the first intercostal space?
The intercostal space (ICS) is the anatomic space between two ribs (Lat. costa). Since there are 12 ribs on each side, there are 11 intercostal spaces, each numbered for the rib superior to it. …
Frequently Asked Questions(FAQ)
How right superior intercostal vein is formed?
The right superior intercostal vein is visualised on CT examination as a circular opacity laterally at the right aspect of the vertebral body at the T4-T5 level. In venographic examination the RSIV appears to be formed by the confluence of the venous channels, the right second, third and fourth intercostal veins.
How many superior vena cava are there?
two A large vein that carries blood to the heart from other areas of the body. The vena cava has two parts: the superior vena cava and the inferior vena cava.
Is the costal groove superior or inferior?
Between a ridge on the internal surface of the rib and the inferior border is a groove, the costal groove, for the intercostal vessels and nerve. At the back part of the bone, this groove belongs to the inferior border, but just in front of the angle, where it is deepest and broadest, it is on the internal surface.
Where is superior thoracic artery?
The superior thoracic artery (highest thoracic artery) is a small artery located near the armpit in humans. It normally arises from the first division of the axillary artery, but may arise from the thoracoacromial artery, itself a branch of the second division of the axillary artery.
Where does the left superior intercostal vein drain into?
What vein drains the first intercostal space?
supreme intercostal vein The supreme intercostal vein drains the 1st intercostal space posteriorly opening into the vertebral or brachiocephalic veins.
What is intercostal space?
The intercostal spaces, also known as interspaces, are the space between the ribs. There are 11 spaces on each side and they are numbered according to the rib which is the superior border of the space.
What do the posterior intercostal veins drain?
The posterior intercostal veins are veins that drain the intercostal spaces posteriorly. They run with their corresponding posterior intercostal artery on the underside of the rib, the vein superior to the artery. Each vein also gives off a dorsal branch that drains blood from the muscles of the back.
What is Thyrocervical trunk?
The thyrocervical trunk is one of the 3 branches of the first part of the subclavian artery and gives off numerous branches to supply viscera of the neck, the brachial plexus, neck muscles and the scapular anastomosis.
Where does the thoracic aorta end?
The descending thoracic aorta begins at the lower border of the fourth thoracic vertebra and ends in front of the lower border of the twelfth thoracic vertebra, at the aortic hiatus in the diaphragm where it becomes the abdominal aorta.
What does the accessory Hemiazygos vein drain?
The accessory hemiazygos vein, also called the superior hemiazygos vein, drains the superior left hemithorax. In a majority of cases there is a small connection to the left superior intercostal vein, and rarely, 1–2% of the time, the accessory hemiazygos vein drains into the brachiocephalic vein .
What veins form hemiazygos vein?
The hemiazygos vein usually arises from the left ascending lumbar vein and passes through the left crus of the diaphragm. It drains the 9th to 11th left posterior intercostal veins and left subcostal vein, alongside some esophageal veins.
What is a basilic vein?
The basilic vein is the dominant drainage for the dorsum of the hand and passes proximally in the medial bicipital groove.
What are lumbar veins?
The lumbar veins are veins running along the inside of the posterior abdominal wall. They are the lumbar equivalent of the posterior intercostal veins of the thorax.
Which intercostal muscle is deepest?
innermost intercostal muscles The innermost intercostal muscles are muscles of respiration. They are the deepest intercostal muscles located in the intercostal spaces, and contract along with the internal intercostal muscles to reduce the transverse dimension of the thoracic cavity during expiration.
Which is the highest structure in neurovascular bundle of 1st intercostal space?
The superior (supreme) intercostal artery, a branch of the costocervical trunk of the subclavian artery, branches into the first two posterior intercostal arteries.
Where is angle of Louis?
The sternal angle (angle of Louis) is the anterior angle formed by the junction of the manubrium and the body of the sternum which varies around 162 degrees in males.
What is the origin of posterior intercostal vein?
The azygos vein drains the posterior thoracic and abdominal wall, and is formed by the confluence of the ascending lumbar veins and the right subcostal vein at vertebral level T12.
How many posterior intercostal arteries are there?
11 There are 11 paired arteries that constitute the posterior intercostal arteries. The first two intercostal spaces are supplied by the superior intercostal artery, and the remaining nine are supplied by separate branches from the descending thoracic aorta 1.
Where do the intercostal veins originate?
The anterior intercostal veins originate from the intercostal space just inferior to anterior aspects of their respective ribs and drain into the internal thoracic and musculophrenic veins.
Graduated from ENSAT (national agronomic school of Toulouse) in plant sciences in 2018, I pursued a CIFRE doctorate under contract with Sun’Agri and INRAE in Avignon between 2019 and 2022. My thesis aimed to study dynamic agrivoltaic systems, in my case in arboriculture. I love to write and share science related Stuff Here on my Website. I am currently continuing at Sun’Agri as an R&D engineer.