Clavipectoral fascia(鎖胸筋膜)

Clavipectoral fascia (鎖胸筋膜)	介於Clavicle與pectoralis minor muscle(胸小肌)之間，外側為Coracoid process (喙突)，內側為1st costal cartilage，因此Clavipectoral fascia (鎖胸筋膜)位於1st intercostal space(第一肋間)內。此Fascia 包著Subclavius muscle(鎖骨下肌)與pectoralis minor muscle(胸小肌)，往Axillary region 延伸成為Suspensory lig.。
由上至下、由外至內，穿過此Fascia 的構造為	Cephalic vein (頭靜脈)	為Pectoralis major m.與Deltoid muscle 的分界
	Lateral pectoral nerve (胸外側神經)
	Thoracoacromial artery (胸肩峰動脈) of the axillary artery  於此處可見其四個分枝： (a)Clavicular (b) Acromial (c) Pectoral (d)Deltoid，Deltoid branch 伴隨著Cephalic vein (頭靜脈)
	Infraclavicular lymph nodes