Assertion: shoulder's muscle | /r/CapableOf | act across joint
Facets:
Source sentences:
text: Muscles and their tendons acting across a joint can also increase their contractile strength when needed, thus providing indirect support for the joint.
text: The large muscles acting at this joint perform multiple actions and seemingly simple movements are often the result of composite antagonist and protagonist actions from several muscles.
text: The anterior shoulder refers to the structures forming the front portion of the shoulder joint as well as the muscles acting on this joint.