Anatomical variations of the deep head of Cruveilhier of the flexor pollicis brevis and its significance for the evolution of the precision grip

• Samuel S. Dunlap ,

  Contributed equally to this work with: Samuel S. Dunlap, Janine M. Ziermann

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Writing – original draft

  * E-mail: musclebonedarwin@gmail.com (SSD); jziermann@yahoo.de (JMZ)

  Affiliation Independent Researcher, Reston, VA, United States of America

  ⨯
• M. Ashraf Aziz,

  Roles Conceptualization, Investigation, Resources, Writing – original draft

  Affiliation Howard University College of Medicine, Dept. Anatomy, Washington, DC, United States of America

  ⨯
• Janine M. Ziermann

  Contributed equally to this work with: Samuel S. Dunlap, Janine M. Ziermann

  Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Software, Visualization, Writing – original draft, Writing – review & editing

  * E-mail: musclebonedarwin@gmail.com (SSD); jziermann@yahoo.de (JMZ)

  Affiliation Howard University College of Medicine, Dept. Anatomy, Washington, DC, United States of America

  http://orcid.org/0000-0002-1264-9240

  ⨯