About the Authors

Joshua R. Cummings

Affiliation Department of Biology, Slippery Rock University, Slippery Rock, Pennsylvania, United States of America

Magdalena N. Muchlinski

Affiliation Department of Anatomy and Neurobiology, University of Kentucky, College of Medicine, Lexington, Kentucky, United States of America

E. Christopher Kirk

Affiliation Department of Anthropology, University of Texas, Austin, Texas, United States of America

Susan J. Rehorek

Affiliation Department of Biology, Slippery Rock University, Slippery Rock, Pennsylvania, United States of America

Valerie B. DeLeon

Affiliation Center for Functional Anatomy and Evolution, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America

Timothy D. Smith

timothy.smith@sru.edu

Affiliations School of Physical Therapy, Slippery Rock University, Slippery Rock, Pennsylvania, United States of America, Department of Anthropology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TS EK MM. Performed the experiments: JC TS VD. Analyzed the data: TS JC MM VD EK. Contributed reagents/materials/analysis tools: TS SR. Wrote the paper: TS JC MM VD EK SR.