副上外側上腕皮神経（肩甲上神経の皮枝）と異常な鎖骨上神経

A well-duveloped nervous branch supplying the upper lateral cutanea of the arm, which arose from the suprascapular nerve, ran beneath the acromio-clavicular joint and pentrated the deltoid muscle, is described. In usual cases, this branch is thin and sometimes referred to as the accessory upper lateral cutaneous branch of the arm (Murakami)(or subacromial cutaneous nerve, Yamada). Some unusual supraclavicular nerves, which penetrated the clavicular bone or ran under this bone, are also described.