Department of Cell Biology, Neurobiology and Anatomy, Loyola University Chicago Stritch School of Medicine, Maywood, Illinois, USA.
Clin Anat. 2010 Mar;23(2):210-5. doi: 10.1002/ca.20927.
The aim of this study was to quantify the lengths of nerve segments within the brachial plexus. Twenty cadavers were dissected bilaterally, giving a total of 40 brachial plexuses for measurement. Individual lengths of plexus segments were measured and recorded, and means and standard deviations were calculated for all data. Differences between the means were statistically evaluated using the Student's t-test. Only 3 of 16 segments were found to be longer in women on average, which included the anterior division of the superior trunk, the anterior division of the middle trunk and the posterior division of the inferior trunk. All three cords (medial, lateral, and posterior) were found to be significantly different between genders, the longer segments being in males. Significant bilateral differences were also observed when right and left brachial plexuses from each cadaver were compared. Extra lateral heads (ELHs) to the median nerve were found in 50% of brachial plexuses, the anatomy of which varied bilaterally as well as between genders. Awareness of this variability is important both to anatomists and to clinicians who operate on and around the brachial plexus.
本研究旨在定量测量臂丛神经各神经节段的长度。对 20 具尸体双侧臂丛进行解剖，共测量 40 个臂丛。测量并记录各神经节段的长度，计算所有数据的平均值和标准差。采用学生 t 检验对平均值之间的差异进行统计学评估。仅在女性中，有 3 个 16 个节段的长度平均较长，包括上干前股、中干前股和下干后股。所有 3 个神经束（内侧束、外侧束和后束）在性别之间存在显著差异，男性的节段较长。当比较每个尸体的右侧和左侧臂丛时，还观察到显著的双侧差异。正中神经的外侧头（ELH）在 50%的臂丛中发现，其解剖结构在双侧和性别之间均存在差异。解剖学家和在臂丛周围进行操作的临床医生都需要了解这种变异性。
