Capitulum of the humerus - wikipedia Capitulum of the humerus This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. Please help to improve this article by introducing more precise citations. ( December 2013 ) Capitulum of the humerus Left humerus seen from front ( capitulum visible at bottom right ) Left humerus seen from front ( part of the Appendicular skeleton ) Details Identifiers Latin Capitulum humeri TA A02. 4.04. 022 FMA 23373 Anatomical terms of bone ( edit on Wikidata ) In human anatomy of the arm, the lateral portion of the distal articular surface of the humerus consists of a smooth, rounded eminence, named the capitulum of the humerus. In non-human tetrapods, the name capitellum is generally used, with `` capitulum '' limited to the anteroventral articular facet of the rib ( in archosauromorphs ). It articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone. Contents 1 Lepidosauromorpha 2 Archosauromorpha 3 Additional images 4 References 5 External links Lepidosauromorpha Lepidosaurs show a distinct capitellum and trochlea on the centre of the ventral ( anterior in upright taxa ) surface of the humerus at the distal end. Archosauromorpha In non-avian archosaurs, including crocodiles, the capitellum and the trochlea are no longer bordered by distinct etc. - and entepicondyles respectively, and the distal humerus consists two gently expanded condyles, one lateral and one medial, separated by a shallow groove and a supinator process. Romer ( 1976 ) homologizes the capitellum in Archosauromorphs with the groove separating the medial and lateral condyles. In birds, where forelimb anatomy has an adaptation for flight, its functional if not ontogenetic equivalent is the dorsal condyle of the humerus. Additional images Elbow joint. Deep dissection. Anterior view. Elbow joint. Deep dissection. Posterior view. Elbow joint. Deep dissection. Posterior view. References Jump up ^ `` Evolution of Birds ''. The George Washington University. This article incorporates text in the public domain from page 212 of the 20th edition of Gray 's Anatomy ( 1918 ) Romer, A.S. 1976 Osteology of the reptiles. University of Chicago Press, Chicago. External links Anatomy figure : 07 : 02 - 05 at Human Anatomy Online, SUNY Downstate Medical Center BiowebUW, cached at archive.org Bones of the arm Shoulder girdle, clavicle conoid tubercle trapezoid line costal tuberosity subclavian groove Scapula fossae ( subscapular, supraspinatous, infraspinatous ) notches ( suprascapular, great scapular ) glenoid cavity tubercles ( infraglenoid, supraglenoid ) spine of scapula acromion coracoid process angles ( superior, inferior, lateral ) Humerus upper extremity : necks ( anatomical, surgical ) tubercles ( greater, lesser ) bicipital groove body : radial sulcus deltoid tuberosity lower extremity : capitulum trochlea epicondyles ( lateral, medial ) supracondylar ridges ( lateral, medial ) fossae ( radial, coronoid, olecranon ) Forearm Radius near elbow ( head, tuberosity ) near wrist ( ulnar notch, styloid process, Lister 's tubercle ) Ulna near elbow ( tuberosity, olecranon, coronoid process, radial notch, trochlear notch ) near wrist ( styloid process ) Hand Carpal bones scaphoid lunate triquetral pisiform trapezium trapezoid capitate hamate hamulus Metacarpal bones 1st 2nd 3rd 4th 5th Phalanges proximal intermediate distal Anatomy portal Retrieved from `` https://en.wikipedia.org/w/index.php?title=Capitulum_of_the_humerus&oldid=854959416 '' Categories : Wikipedia articles incorporating text from the 20th edition of Gray 's Anatomy ( 1918 ) Humerus Hidden categories : Pages with unresolved properties Articles lacking in - text citations from December 2013 All articles lacking in - text citations Talk Contents About Wikipedia Magyar Română ไทย Edit links This page was last edited on 14 August 2018, at 23 : 23 ( UTC ). About Wikipedia

Question: what portion of the radius articulates with the capitulum of the humerus
Answer: the cupshaped depression on the head of the radius