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Jan 10
The blood supply to the breast is primarily provided by branches of the internal mammary artery, lateral thoracic artery, and thoracoacromial artery. These arteries supply oxygenated blood to the breast tissue, including the glandular tissue, adipose tissue, and connective tissue.
The internal mammary artery is the main blood supply to the breast and originates from the subclavian artery. It gives off perforating branches that supply the medial aspect of the breast. The lateral thoracic artery arises from the axillary artery and provides blood to the lateral aspect of the breast. The thoracoacromial artery, also originating from the axillary artery, supplies the upper part of the breast.
In addition to these arteries, there are also smaller branches that contribute to the blood supply, such as the intercostal arteries and branches from the posterior intercostal arteries.
The breast also receives venous drainage through a network of veins, including the internal mammary veins, lateral thoracic veins, and thoracoepigastric veins. These veins ultimately drain into the axillary vein.
Regarding nerve supply, the breast is innervated by branches of the intercostal nerves, specifically the anterior and lateral cutaneous branches. These nerves provide sensory innervation to the breast tissue, allowing for the perception of touch, temperature, and pain.
The anterior cutaneous branches of the intercostal nerves supply the anterior aspect of the breast, while the lateral cutaneous branches innervate the lateral aspect. The nerves penetrate the breast tissue and form a network that extends throughout the glandular tissue.
It is important to note that the nerve supply to the breast is primarily sensory, meaning it is responsible for transmitting sensory information from the breast to the central nervous system. The breast does not have significant motor innervation.
The internal mammary artery is the main blood supply to the breast and originates from the subclavian artery. It gives off perforating branches that supply the medial aspect of the breast. The lateral thoracic artery arises from the axillary artery and provides blood to the lateral aspect of the breast. The thoracoacromial artery, also originating from the axillary artery, supplies the upper part of the breast.
In addition to these arteries, there are also smaller branches that contribute to the blood supply, such as the intercostal arteries and branches from the posterior intercostal arteries.
The breast also receives venous drainage through a network of veins, including the internal mammary veins, lateral thoracic veins, and thoracoepigastric veins. These veins ultimately drain into the axillary vein.
Regarding nerve supply, the breast is innervated by branches of the intercostal nerves, specifically the anterior and lateral cutaneous branches. These nerves provide sensory innervation to the breast tissue, allowing for the perception of touch, temperature, and pain.
The anterior cutaneous branches of the intercostal nerves supply the anterior aspect of the breast, while the lateral cutaneous branches innervate the lateral aspect. The nerves penetrate the breast tissue and form a network that extends throughout the glandular tissue.
It is important to note that the nerve supply to the breast is primarily sensory, meaning it is responsible for transmitting sensory information from the breast to the central nervous system. The breast does not have significant motor innervation.
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