eLucy
Compare Lucy: Humerus

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Select a view:

  • lucy humerus distal viewDistal
  • lucy humerus dorsal posterior viewDorsal / Posterior
  • lucy humerus lateral viewLateral
  • lucy humerus medial viewMedial
  • lucy humerus proximal viewProximal
  • lucy humerus ventral anterior viewVentral / Anterior

Distal View

Au. afarensis (Lucy)

H. sapiens (Female Human)

P. troglodytes (Male Chimpanzee)

 

Dorsal/Posterior View

Au. afarensis (Lucy)

H. sapiens (Female Human)

P. troglodytes (Male Chimpanzee)

 

Lateral View

Au. afarensis (Lucy)

H. sapiens (Female Human)

 

Medial View

Au. afarensis (Lucy)

H. sapiens (Female Human)

 

Proximal View

Au. afarensis (Lucy)

H. sapiens (Female Human)

 

Ventral/Anterior View

Au. afarensis (Lucy)

H. sapiens (Female Human)

 

Primates that move by quadrupedal locomotion have arms (forelimbs) and legs (hindlimbs) of equal length, while bipedal humans have longer legs than arms. In comparison, Lucy maintains relatively longer arms to her legs.

Lucy’s intermembral index (i.e., radius length plus humerus length, divided by femur length plus tibia length) is 84.6. The mean of this measurement in humans is 71.8, indicating humans have shorter arms relative to their legs. The common Chimpanzee measurement is 106. In other words, Lucy appears to have intermediate measurements between modern humans and chimpanzees.