AcromionSpine of scapulaTrapeziusDeltoidDeltoid tuberosity of humerusRhomboid minorRhomboid majorClavicleSuperior nuchal lineExternal occipitalprotuberanceMastoid processLigamentum nuchaeSpinous processes and interspinous ligaments to TXIIAccessory nerve (XI)Levator scapulaeAxillary nervePosterior circumflex humeral arteryLine of attachment of trapeziusLine of attachment of deltoid