All in the Family - Guest star: Neanderthal

Close enough. The thoracohumeral muscle group includes the latissimus dorsi and pectoralis major, and are the thingies that allow you to lift and move your arms and shoulders, etc. Attachment points for some muscles (c.f., pectoralis major) were apparently slightly different in neanderthalensis (however you define them - species or subspecies) than in anatomically modern humans like cro-magnon according to the Duarte article. I love how taxonomists and especially human taxonomists like to pee all over each others' research. Human evolution has to be the nastiest branch of evolutionary biology.