Visual Anatomy 視覚解剖学

腋窩動脈　　（えきかどうみゃく、英： axillary artery ）

　・枝

　・参考となるサイト　（ Wikipedia 、　イラスト掲載サイト）

　腋窩動脈とは

「船戸和弥のホームページ」では以下のように解説している。

「第１肋骨外側縁の高さで鎖骨下動脈よりつづいてはじまり、大円筋の停止腱の高さで上腕動脈に移行する。」

　通常、腋窩動脈は以下のように3部に区分される。

　以下は腋窩動脈の枝を簡単に表したものとなる。

　※ 枝や吻合も示してみたが、その全てを挙げられているわけではない。　

　以下は「 Wikipedia 」の解説文となる。

「 In human anatomy, the axillary artery is a large blood vessel that conveys oxygenated blood to the lateral aspect of the thorax, the axilla (armpit) and the upper limb. Its origin is at the lateral margin of the first rib, before which it is called the subclavian artery.
After passing the lower margin of teres major it becomes the brachial artery.

【 Structure 】

　The axillary artery is often referred to as having three parts, with these divisions based on its location relative to the Pectoralis minor muscle, which is superficial to the artery.

・ First part - the part of the artery superior to the pectoralis minor
・ Second part - the part of the artery posterior to the pectoralis minor
・ Third part - the part of the artery inferior to the pectoralis minor.
【語句】

・ convey ：運ぶ　・ axilla ：腋窩　　・ teres major ：大円筋　　・ brachial artery ：上腕動脈

【 Relation to nerves and vein 】
The axillary artery is accompanied by the axillary vein, which lies medial to the artery, along its length.
In the axilla, the axillary artery is surrounded by the brachial plexus. The second part of the axillary artery is the reference for the locational descriptions of the cords in the brachial plexus. For example, the posterior cord of the brachial plexus is so named because it lies posterior to the second part of the artery.
【 Branches 】
The axillary artery has several smaller branches. The branches can be remembered, in order, when traveling from the heart, with the mnemonics "Screw The Lawyers Save A Patient", "Summertime: The Lakers Schedule Another Parade", "Sixties Teens Love Sex And Pot", or "She Tastes Like Sweet Apple Pie."[1] The origin of these branches is highly variable (e.g. the posterior and anterior circumflex arteries often have a common trunk). An arterial branch is named for its course, not its origin.

First part (1 branch)

　・ Superior thoracic artery (Supreme thoracic artery)

Second part (2 branches)

　・ Thoraco-acromial artery
　・ Lateral thoracic artery. If the lateral thoracic artery is not branching from the axillary artery, will most likely branch from the following (in order of likelihood): (1) thoracoacromial, (2) third part of axillary artery, (3) suprascapular artery, (4) subscapular artery