has muscle origin has muscle origin has muscle insertion has muscle insertion clavicle bone pectoral muscle rib 1 subclavius http://upload.wikimedia.org/wikipedia/commons/a/a2/Gray411subclavius.png NCIT:C33644 Wikipedia:Subclavius_muscle musculus subclavius subclavicular muscle The Subclavius is a small triangular muscle, placed between the clavicle and the first rib. Along with the pectoralis major and pectoralis minor muscles, the subclavius muscle makes up the anterior wall of the axilla. FMA:13410 UBERON:0008779 UMLS:C0224348