Thoracoacromial artery

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Thoracoacromial artery
Axillary branches.PNG
Branches of axillary artery, including thoracoacromial artery
Gray524.png
The scapular and circumflex arteries. (Thoracoacromial branch of thoracoacromial labeled at upper right.)
Details
Source axillary artery
Identifiers
Latin arteria thoracoacromialis
TA A12.2.09.005
FMA 22671
Anatomical terminology

The thoracoacromial artery (acromiothoracic artery; thoracic axis) is a short trunk that arises from the second part of the axillary artery, its origin being generally overlapped by the upper edge of the pectoralis minor.

Axillary artery Large blood vessel bringing oxygenated blood to the thorax

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.

Pectoralis minor human chest muscle

The pectoralis minor is a thin, triangular muscle, situated at the upper part of the chest, beneath the pectoralis major in the human body.

Contents

Structure

Projecting forward to the upper border of the Pectoralis minor, it pierces the coracoclavicular fascia and divides into four branches—pectoral, acromial, clavicular, and deltoid.

BranchDescription
Pectoral branchDescends between the two pectorales, and is distributed to them and to the mamma, anastomosing with the intercostal branches of the internal thoracic artery and with the lateral thoracic.
Acromial branchRuns laterally over the coracoid process and under the deltoideus, to which it gives branches; it then pierces that muscle and ends on the acromion in an arterial network formed by branches from the transverse scapular (a.k.a. suprascapular), thoracoacromial, and posterior humeral circumflex arteries.
Clavicular branchRuns upward and medialward to the sternoclavicular joint, supplying this articulation, and the subclavius.
Deltoid (humeral) branchOften arising with the acromial, it crosses over the pectoralis minor and passes in the same groove as the cephalic vein, between the pectoralis major and deltoideus, and gives branches to both muscles.

Additional images

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Medial pectoral nerve

The medial pectoral nerve arises from the medial cord of the brachial plexus and through it from the eighth cervical and first thoracic roots.

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The medial antebrachial cutaneous nerve arises from the medial cord of the brachial plexus.

Circumflex scapular artery Artery of the upper body

The circumflex scapular artery is a branch of the subscapular artery and part of the scapular anastomoses.

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Lateral pectoral nerve

The lateral pectoral nerve arises from the lateral cord of the brachial plexus, and through it from the fifth, sixth, and seventh cervical nerves.

Suprascapular artery Artery of the neck

The suprascapular artery is a branch of the thyrocervical trunk on the neck.

Clavipectoral fascia

The clavipectoral fascia is a strong fascia situated under cover of the clavicular portion of the pectoralis major.

Superior thoracic artery

The superior 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.

Pectoral fascia

The pectoral fascia is a thin lamina, covering the surface of the pectoralis major, and sending numerous prolongations between its fasciculi: it is attached, in the middle line, to the front of the sternum; above, to the clavicle; laterally and below it is continuous with the fascia of the shoulder, axilla, and thorax.

Muscular triangle

The inferior carotid triangle, is bounded, in front, by the median line of the neck from the hyoid bone to the sternum; behind, by the anterior margin of the sternocleidomastoid; above, by the superior belly of the omohyoid.

Thoracodorsal artery Large blood vessel

The thoracodorsal artery is a branch of the subscapular artery. It travels inferiorly with the thoracodorsal nerve and supplies the latissimus dorsi.

Clavipectoral triangle

The clavipectoral triangle is an anatomical region found in humans and other animals. It is bordered by the following structures:

Pectoral axillary lymph nodes

An anterior or pectoral group consists of four or five glands along the lower border of the Pectoralis minor, in relation with the lateral thoracic artery.

References

This article incorporates text in the public domain from page 588 of the 20th edition of Gray's Anatomy (1918)

The public domain consists of all the creative work to which no exclusive intellectual property rights apply. Those rights may have expired, been forfeited, expressly waived, or may be inapplicable.

<i>Grays Anatomy</i> textbook of human anatomy

Gray's Anatomy is an English written textbook of human anatomy originally written by Henry Gray and illustrated by Henry Vandyke Carter. Earlier editions were called Anatomy: Descriptive and Surgical, Anatomy of the Human Body and Gray's Anatomy: Descriptive and Applied, but the book's name is commonly shortened to, and later editions are titled, Gray's Anatomy. The book is widely regarded as an extremely influential work on the subject, and has continued to be revised and republished from its initial publication in 1858 to the present day. The latest edition of the book, the 41st, was published in September 2015.