intercostobrachialis
The intercostobrachialis is a small muscular or fascial structure located in the upper limb, specifically within the region of the axilla (armpit). Its name derives from its anatomical relationships, with "intercostal" indicating proximity to the intercostal spaces of the thoracic wall and "brachialis" referring to its association with the upper arm. Although not universally recognized as a distinct independent muscle, the intercostobrachialis is often considered a fascia or muscle slip that connects the inner surface of the second or third intercostal space to the medial aspect of the upper arm.
Anatomically, the intercostobrachialis typically originates from the second or third intercostal space in the thoracic wall,
The intercostobrachialis often corresponds to or overlaps with other fasciae or muscles, such as the medial
Overall, the intercostobrachialis is a lesser-known component of the thoracic and axillary anatomy, with a potential