The trochlear notch (/ˈtrɒklɪər/),[1] also known as semilunar notch and greater sigmoid cavity, is a large depression in the upper extremity of the ulna that fits the trochlea of the humerus (the bone directly above the ulna in the arm) as part of the elbow joint. It is formed by the olecranon and the coronoid process.
Trochlear notch
Upper extremity of left ulna. Lateral aspect. (Semilunar notch visible at center top.)
About the middle of either side of this notch is an indentation, which contracts it somewhat, and indicates the junction of the olecranon and the coronoid process.
The notch is concave from above downward, and divided into a medial and a lateral portion by a smooth ridge running from the summit of the olecranon to the tip of the coronoid process.
The medial portion is the larger, and is slightly concave transversely; the lateral is convex above, slightly concave below.
Referencesedit
^. Lexico Dictionaries | English. Archived from the original on November 12, 2020.
This article incorporates text in the public domain from page 215 of the 20th edition ofGray's Anatomy(1918)
External linksedit
Anatomy figure: 10:06-02 at Human Anatomy Online, SUNY Downstate Medical Center
Right ulna (anterior - proximal end)[dead link] - BioWeb at University of Wisconsin System
trochlear, notch, greater, sigmoid, cavity, redirects, here, sigmoid, cavity, ulnar, notch, radius, trochlear, notch, ɪər, also, known, semilunar, notch, greater, sigmoid, cavity, large, depression, upper, extremity, ulna, that, fits, trochlea, humerus, bone, . Greater sigmoid cavity redirects here For Sigmoid cavity see Ulnar notch of the radius The trochlear notch ˈ t r ɒ k l ɪer 1 also known as semilunar notch and greater sigmoid cavity is a large depression in the upper extremity of the ulna that fits the trochlea of the humerus the bone directly above the ulna in the arm as part of the elbow joint It is formed by the olecranon and the coronoid process Trochlear notchUpper extremity of left ulna Lateral aspect Semilunar notch visible at center top DetailsIdentifiersLatinincisura trochlearis ulnae incisura semilunaris ulnaeTA98A02 4 06 006TA21235FMA23619Anatomical terms of bone edit on Wikidata About the middle of either side of this notch is an indentation which contracts it somewhat and indicates the junction of the olecranon and the coronoid process The notch is concave from above downward and divided into a medial and a lateral portion by a smooth ridge running from the summit of the olecranon to the tip of the coronoid process The medial portion is the larger and is slightly concave transversely the lateral is convex above slightly concave below References edit Trochlear Definition of Trochlear by Oxford Dictionary on Lexico com also meaning of Trochlear Lexico Dictionaries English Archived from the original on November 12 2020 nbsp This article incorporates text in the public domain from page 215 of the 20th edition of Gray s Anatomy 1918 External links editAnatomy figure 10 06 02 at Human Anatomy Online SUNY Downstate Medical Center Right ulna anterior proximal end dead link BioWeb at University of Wisconsin System Upperextremity arm radiology lat elbow at the Dartmouth Medical School s Department of Anatomy Portal nbsp Anatomy nbsp This human musculoskeletal system article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Trochlear notch amp oldid 1207415950, wikipedia, wiki, book, books, library,
