Pedro Ernesto University Hospital, State University of Rio de Janeiro, Rio de Janeiro, Brazil.
Marcílio Dias Naval Hospital, Brazilian Navy, Rio de Janeiro, Brazil.
Hand (N Y). 2022 Jan;17(1):50-54. doi: 10.1177/1558944720906510. Epub 2020 Feb 26.
The objective of this work was to perform a critical review of the 2-dimensional and 3-dimensional anatomy of the adult brachial plexus divisions and cords. Twelve adult brachial plexuses from fresh cadavers were dissected. All were male and aged between 30 and 50 years. Only corpses without brachial plexus injuries were selected. The purpose of the dissections was to identify the origin of the anterior and posterior divisions of the adult brachial plexus in their respective trunks, as well as the positioning of the posterior, lateral, and medial cords. The posterior division of all trunks had a cranial and dorsal origin, while the anterior division of all trunks had a caudal and ventral origin. The posterior cord was the most cranial of all, the lateral cord was central, and the medial cord was the most caudal of all cords. The posterior division of the superior trunk was always between the suprascapular nerve and the anterior division. Brachial plexus diagrams in most textbooks and papers are different from what was found in our dissections. Contrary to the known diagram, the posterior divisions always had a cranial origin in the superior, middle, and inferior trunks.
本研究旨在对成人臂丛神经干和神经束的二维和三维解剖结构进行批判性评估。对 12 具来自新鲜尸体的成人臂丛神经进行解剖。所有尸体均为男性，年龄在 30 至 50 岁之间。仅选择没有臂丛神经损伤的尸体。解剖的目的是确定成人臂丛神经干中前、后分支在各自干中的起源，以及后、外侧和内侧束的定位。所有干的后分支均有颅侧和背侧起源，而所有干的前分支均有尾侧和腹侧起源。后束是所有束中最颅侧的，外侧束居中，内侧束是所有束中最尾侧的。上干的后分支始终位于肩胛上神经和前分支之间。大多数教科书和论文中的臂丛神经图与我们的解剖结果不同。与已知的图谱相反，后分支在上、中、下干中始终有颅侧起源。
