Accessory part of the deltoid muscle

Abstract

This article has been peer reviewed and published immediately upon acceptance.It is an open access article, which means that it can be downloaded, printed, and distributed freely, provided the work is properly cited. Articles in "Folia Morphologica" are listed in PubMed.

Novel Muscle in Infraspinous Fossa

“…Both the IS and DELT originate from a common premuscle mass during development. In the 11 mm embryo, development of the acromion partially separates the supraspinatus and IS, and the DELT partially splits off from the mass towards its origin from the acromion and clavicle [8,9]. The most reasonable argument for considering the muscle to be an IS variant is its innervation from the sSN.…”

An unusual occurrence of a four-headed psoas major: a case report

“…Although the veins, arteries and nerves are typically presented as the most variable structures, muscles and ligaments also demonstrate significant variation [11,17,18,21,29].…”