P K Miller, A L Woods, C Sloane, L Booth
Obesity, heuristic reasoning and the organisation of communicative embarrassment in diagnostic radiography
Radiography (London, England : 1995)
introduction bearded capuchins display wide variety manipulatory skills make routine use tools captivity wild efficient handling objects genus led several investigators assume nearhuman thumb movements despite lack anatomical studies methods performed anatomical analysis muscles bones capuchin hand sapajus morphological traits quantitatively compared humans chimpanzees gorillas baboons results comparative analysis indicated sapajus hand similar baboons least similar humans according muscles bones threedimensional data furthermore findings suggest bearded capuchins lack true thumb opponency regarding manipulatory skills display rather primitive hand traits limited resources precision grasping using opponens pollicis discussion findings suggest bearded capuchins complex use tools depends heavily high cognitive abilities versatile hand apparatus findings offer crucial insights evolution primate cognition