title: Left musculus sternalis.
abstract: During routine dissection in the Morphological Sciences Department II of the Universidad Complutense de Madrid, the presence of a sternalis muscle was observed in the left hemithorax of a 70-year-old male cadaver. We report on its position, relationships, and innervation, as well as its clinical relevance, indicating some guidelines for its physical examination. We also present a brief overview of the existing literature regarding the nomenclature, historical reports, and incidence of this muscle.
authors.affiliation: Department of Morphological Sciences II, Faculty of Medicine, University Complutense, Madrid, Spain. arraezla@med.ucm.es
authors.forename: L A
authors.initials: LA
authors.lastname: Arráez-Aybar
authors.forename: J
authors.initials: J
authors.lastname: Sobrado-Perez
authors.forename: J R
authors.initials: JR
authors.lastname: Merida-Velasco
mesh_terms: D000368:Aged; D006801:Humans; D007367:Intercostal Nerves / Q000033:anatomy & histology; D008297:Male; D018482:Muscle, Skeletal / Q000033:anatomy & histology; D010369:Pectoralis Muscles / Q000002:abnormalities / Q000033:anatomy & histology* / Q000294:innervation; D013249:Sternum / Q000033:anatomy & histology; D013909:Thorax / Q000033:anatomy & histology