forelimb

Rodents lack the direct cortico–motor neuron projections[0] that support fine control of forelimb movements.

The 'strange' part is clarified better in the Wikipedia page [0]: > The forelimb of Drepanosaurus is highly modified compared to other vertebrates and very robust.

Using high-speed videography and kinetic analyses, we describe the limb loading patterns and pendular mechanics of beakiation, and compare the biomechanical characteristics of this gait with other suspensory behaviours (namely, forelimb-driven brachiation and inverted quadrupedal walking).

Thirteen of its bones, according to the study’s authors, showed signs of butchering, including cuts and “percussion marks” on both humeri (forelimb bones), which is typical of smashing open a bone to access the marrow.

And the professional digital modeler that just found a way to cut 20 triangles out of the trunk wireframe just rolls their eyes and goes back to fine-tuning the skeleton so that the active forelimb doesn't pinch in the "skull-crush execution" animation....

Thirteen of its bones, according to the study’s authors, showed signs of butchering, including cuts and “percussion marks” on both humeri (forelimb bones), which is typical of smashing open a bone to access the marrow.

And the professional digital modeler that just found a way to cut 20 triangles out of the trunk wireframe just rolls their eyes and goes back to fine-tuning the skeleton so that the active forelimb doesn't pinch in the "skull-crush execution" animation....