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POSTERIOR INTERCOSTAL ARTERIES Course Relations Branches Dr G Bhanu Prakash
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=3jqawlGmlaU
📌 𝐅𝐨𝐥𝐥𝐨𝐰 𝐨𝐧 𝐈𝐧𝐬𝐭𝐚𝐠𝐫𝐚𝐦:- / drgbhanuprakash • 📌𝗝𝗼𝗶𝗻 𝗢𝘂𝗿 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗖𝗵𝗮𝗻𝗻𝗲𝗹 𝗛𝗲𝗿𝗲:- https://t.me/bhanuprakashdr • 📌𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗧𝗼 𝗠𝘆 𝗠𝗮𝗶𝗹𝗶𝗻𝗴 𝗟𝗶𝘀𝘁:- https://linktr.ee/DrGBhanuprakash • POSTERIOR INTERCOSTAL ARTERIES • ------------------------------------------------------------- • The intercostal spaces are supplied by pairs of anterior and posterior intercostal arteries. • There are 11 pairs of intercostal arteries, Posterior Intercostal arteries supply greater part of the intercostal spaces. • The first and second intercostal spaces are supplied by the superior intercostal artery by its branches, and the remaining nine are supplied by separate branches from the descending thoracic aorta. • The superior intercostal artery is the descending branch of the costocervical trunk, arises from the second part of the subclavian artery • Right and left subclavian arteries classically have different origins: • right subclavian artery (RSA) is one of the terminal branches of the brachiocephalic artery • left subclavian artery (LSA) arises as the third branch of the aortic arch after the left common carotid artery • Course and Relations • ---------------------------------- • The right posterior intercostal arteries are longer than the left as a reason the descending aorta lies on the left side and anterior to the vertebral column. • Posterior intercostal arteries pass behind the oesophagus, thoracic duct, azygos vein, and sympathetic chain but anterior to the vertebral body . • left posterior intercostal arteries are smaller than right and runs behind the hemiazygos vein , sympathetic chain, but infront of the side of the vertebral body . • The posterior intercostal artery divides into the anterior and posterior ( dorsal ) rami. • In the intercostal space, the anterior rami of posterior intercostal artery runs between the intercostal vein (above) and the intercostal nerve (below). • Termination • ------------------- • posterior intercostal arteries ends at the level of costochondral junction by anastomosing with the anterior intercostal artery . . • Branches • --------------- • 1. Dorsal ( ramus ) branch: It supplies the spinal cord, vertebra and muscles, and skin of the back. • 2. Collateral branch: • 3. Muscular branches: supply intercostal, pectoral,and serratus anterior muscles. • 4. Lateral cutaneous branch: • 5. Mammary branches (external mammary arteries) : They arise from posterior intercostals arteries of the 2nd, 3rd, and 4th intercostal spaces and supply the breast mammary gland. • 6. Right bronchial artery: It arises from right 3rd posterior intercostal artery. • #posteriorintercostalartery #intercostalartery #drgbhanuprakash #anatomyvideos #anatomyusmle #anatomymbbs #anatomylectures #usmlestep1 #usmle #usmleprep #usmlecoaching #usmlecourse #usmlestudents #usmleexams #usmlestep1videos
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