Results: The lateral ramuli of the anterior cutaneous branches of T 2 6 and their nutrient vessels penetrated the corresponding intercostal tissues in the parasternal region, and exhibited a segmental and overlapping distribution on the anterior thoracic region. 结果:第2~6肋间神经前皮支的外侧支及其营养血管于胸骨两旁相应肋间穿出深筋膜,呈节段性、重叠性分布于胸前区皮肤。