胸锁乳突区及颈根部

图45 颈襻及支配的肌肉
Ansa cervicalis and innervation of muscle

图46 颈部动脉
Cervical artery

图47 颈外侧区及其结构
Lateral cervical region and its structure

图48 颈根部的结构（前面观）
Structure of the root of neck (anterior aspect)

图49 颈根部的结构（侧面观）
Structure of the root of neck (lateral aspect)

图50 前斜角肌及其毗邻
Scalenus anterior and its neighbourhood

图51 颈根部的结构
Structure of the root of neck