Immediate online access to all issues from 2019. https://doi.org/10.1055/s-2008-1045051, Perez EA (2013) Fractures of the shoulder, arm, and forearm. The semilunar notch of the ulna (trochlear notch of ulna, greater sigmoid cavity) is a large depression, formed by the olecranon and the coronoid process, and serving for articulation with the trochlea of the humerus. The trochlear together with capitulum of humerus both articulate with trochlear notch of ulna as well as radial head correspondingly. Radius And Ulna Bones Anatomy Anterior Markings. Thus, the union of the trochlea of humerus and ulna creates a hinge joint so that the forearm can move, but in one plane that consists of forwards and backward. Radius head, Radial tuberosity, Styloid process of radius, Ulna, Olecranon process, trochlear notch, coronoid process, styloid process of ulna head of radius and radial notch of ulna. The Ulna Proximal Shaft Distal Teachmeanatomy. The articular contour of each ulnar trochlear notch was digitized. The projection that forms the upper border of this notch is called the olecranon process; it articulates behind the humerus in the olecranon fossa and may be felt as the point of the elbow. o The ulna is the longer, medially placed bone of the forearm. This notch allows for the radius to move smoothly and freely on the ulna, which allows for the rotation of the forearm. Box 300, 54124, Thessaloniki, Greece, Trifon Totlis, Nikolaos Otountzidis, Stavros Papadopoulos & Konstantinos Natsis, Department of Anatomy, Medical School, National and Kapodistrian University of Athens, Athens, Greece, You can also search for this author in Ulna. In the upper arm, you find muscles such as the anconeus and triceps brachii, which form insertions that extend the forearm at elbow. Front. Subscription will auto renew annually. Elsevier/Churchill Livingstone, Philadelphia, pp 821–836, Rosenberg ZS, Beltran J, Cheung Y, Broker M (1995) MR imaging of the elbow: normal variant and potential diagnostic pitfalls of the trochlear groove and cubital tunnel. Identify whether the different parts of the ulna and radius are proximal or distal. c. Professor. — … In contrast to the more mobile radius, rotary motion is very restricted at the ulnar part of the elbow joint, sharply limiting the ulna in its ability to rotate around its long axis. School. The top of the ulna forms a C-shaped bump, which is made up of both the radial notch and the trochlear notch. It is this marrow, which stores energy needed by the body in form of fats and triglycerides. Surgical and Radiologic Anatomy This notch allows for the radius to move smoothly and fre… The lateral part is convex at its top and lightly concave at its lower part or below. That smooth ridge running from olecranon ends up at the coronoid process. It is formed by the olecranon and the coronoid process. the deep trochlear notch of the ulna at the humero-ul-nar articulation, forming a hinge joint that allows flex-ion and extension at the elbow. J Shoulder Elb Surg 12:293–296. Ctc Skeletal System Flashcards By … https://doi.org/10.1007/s00276-019-02310-y, DOI: https://doi.org/10.1007/s00276-019-02310-y, Over 10 million scientific documents at your fingertips, Not logged in Correlation to gender and side was examined. The coronoid process helps in locking ulna in place. Trochlear Notch Ulna. This transverse ridge, the “bare area”, is not covered by cartilage and represents the optimal entry point for olecranon osteotomies. In either sides of the notch at the middle is an indentation. In each part of spongy bone, it consists of tiny columns, which are referred to as trabeculae, and these columns act like steel girders of bridge meaning they can withstand stress that is placed on the ulna bone. 97-1). The proximal end of the ulna articulates with the trochlea of the humerus. The Ulna is the medial bone of forearm and is homologous to the lateral bone of leg– the fibula.The ulna is attached to by muscles in the arm and forearm to perform movements of wrist, hand and the arm. The distal epiphyses of the right radius and ulna. Lorraine Jadeski. The most common morphological pattern of the proximal ulna articular surface was the olecranon and coronoid facets separated by the transverse ridge, which is considered as the typical anatomical pattern. rich019. To enable movement at the elbow joint, the ulna has a specialised structure, with bony prominences for muscle attachment. Trochlear notch is a deep notch facing anterior in the ulna’s thick proximal end. A chevron osteotomy of the ulna is widely used to obtain intra-articular access to the elbow in the treatment of type C distal humerus fractures.The trochlear notch of the proximal ulna is divided into 2 articular parts by the “bare area.” Ideally, the olecranon osteotomy should be centered on the bare area to minimize damage to the joint cartilage. Ulna Radius And Carpals Biology 2320 With Sawitzke At. Trochlear Notch Ulna. In anatomic position, the radius is lateral. They are noticeable in an elbow MRI and they may have implications on olecranon osteotomy. A biomechanical interpretation of its origin. The angle between the humerus and ulna when the arm is in anatomical position (valgus); for males: 5-15 degrees, for females: greater than 15 degrees . In everyday functions for instance driving a car, or throwing a ball, the movement of ulna plays a big role. ar notch. Absence of the transverse ridge may confuse the surgeon during elbow arthroscopy. Its lower border is the coronoid process, while the upper boundary is the anterior projection of the olecranon. Ulna Radius And Carpals Biology 2320 With Sawitzke At. One of the more common uses of trochlea is in the term trochlea of humerus. proximal radioulnar joint. This indentation make the notch to contract and it indicates a junction of coronoid process and olecranon. Purpose. Radiohumeral joint. The trochlea is a pulley-shaped projection that articulates with the trochlear notch of the ulna. Note that the distal end of the ulna is separated from the wrist bones by the articular disc. Examination through imaging like X-ray may be conducted to determine which part of the joint is damaged and the right treatment procedure to apply. Ulna is categorized as a bone due to its narrow long shape and as other long bones; it has a similar structure of having a hollow shaft that is surrounded by some compact bone reinforced at ends with bones that are spongy. trochlear sclerosis of the semilunar notch of the ulna may be found radiographically. trochlear notch of ulna articulating with trochlea of humerus. The trochlear notch (also semilunar notch, or 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. Ulna bone is longer and large usually more medial of the bones of the lower arm. HK 3401. Aim of the present study was to encounter the anatomical variations in the morphology of the trochlear notch articular surface. If you enjoyed this article, subscribe to receive more great content just like it. In: Canale ST, Beaty JH, Campbell WC (eds) Campbell’s operative orthopaedics. PubMed  The top end of the ulna has a distinguishing feature that sets it apart from other bones, including the similar radius. carrying angle. This articulates with the head of the radius and this bit is lateral. In ulna …large C-shaped notch—the semilunar, or trochlear, notch—which articulates with the trochlea of the humerus (upper arm bone) to form the elbow joint. The authors declare that they have no conflict of interest. Ulna extends from the elbow to wrist through the forearm and it narrows down significantly, as it reaches the distal end. The ulna is one of the two long bones that comprise the lower arm, or forearm. The ulna contributes the articular cartilage–covered trochlear notch to the hinge of the elbow joint, which is carved out of the olecranon process at the proximal end of the ulna. The top of the ulna forms a C-shaped bump, which is made up of both the radial notch and the trochlear notch. [TA] the large semicircular notch at the proximal extremity of the ulna between the olecranon and coronoid processes that articulates with the trochlea of the humerus. The trochlear notch of ulna or the semilunar notch is also called the greater sigmoid cavity and it forms a large depression from the coronoid process and olecranon. Published on 22 Oct 2016. It is wherever the brachialis muscle attaches. © 2020 Springer Nature Switzerland AG. articulation between the capitulum of the humerus and head of the radius. The trochlear nerve, also known as the fourth cranial nerve, is located near the brain and serves the superior oblique muscle of the eye. The trochlear notch is the large, jaw-like curvature of the proximal ulna that articulates with the trochlea (of the humerus), forming the humeroulnar joint (Figure 5-6). In: Canale ST, Beaty JH, Campbell WC (eds) Campbell’s operative orthopaedics. It is a cartilage covered articular surface that receives the pulley-like trochlea of the humerus. Anat Rec 248:189–197, CAS  trochlear notch of ulna الثلمة البكرية للزند. The trochlear notch (also semilunar notch, or 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. University of Guelph. The typical anatomical illustration of the trochlear notch articular surface includes a transverse rough non-articular ridge which separates the olecranon and coronoid part of the joint. 63 views 6 pages. The trochlear (or semilunar) notch of the ulna articulates with the trochlear articular surface of the distal humerus. It is formed by the olecranon and the coronoid process. The articular surface for the ulna is called the ulnar notch ( sigmoid cavity) of the radius; it is in the distal radius, and is narrow, concave, smooth, and articulates with the head of the ulna forming the distal radioulnar joint . Assessing the ulnar trochlear notch (UTN) radiographic anatomy has been considered important, but difficult, in the diagnosis of elbow dyspla-sia. trochlear notch of ulna and trochlea of humerus. You’ve got the capitulum and the trochlea articulating with the head of the radius and the trochlear notch of the ulna respectively. joint capsule. It is set obliquely, so that a "carrying angle" exists between the arm and the extended and supinated forearm. The trochlear notch of ulna serves as an articulation point with trochlea of humerus. The occurrence of Type II and III was significantly more common in females (p < 0.001). -large notch on the proximal end of the ulna that is formed by the olecranon and coronoid processes-articulates with the trochlea on the humerus -flexion and extension of the elbow (C)- Olecranon (See Figure G) - forms point of elbow-forms superior lip of trochlear notch-during extension, projects into the olecranon fossa of humerus-flexion and extension of the elbow. These variations affect the area covered by cartilage. Ulna study guide by Linda430 includes 11 questions covering vocabulary, terms and more. However, interobserver agreement in grading this feature is only fair, being identified by observers with moderate sensitivity but with relatively poor specificity. Elsevier/Mosby, Philadelphia, pp 2829–2916, Ring D, Jupiter JB (2011) Fractures of proximal ulna. How can you distinguish a right from a left forearm? Correspondence to Human Kinetics. Radial notch –Located on the lateral surface of the trochlear notch, this area articulates among the head of the radius. Medical articles with comprehensive coverage on diseases, conditions and treatment. In: Standring S, Gray H (eds) Gray’s anatomy: the anatomical basis of clinical practice. RESULTS: Radius of curvature of the ulnar trochlear notch was not a constant function of arc length in either breed but had a consistent characteristic appearance in both breeds. Shaft of the Ulna The shaft of the ulna is triangular in … 1, 6 Most prevalent signs on CT are periarticular osteophytes (97 per cent) subchondral sclerosis affecting the MCP (86 per cent) humerus (84 per cent) or ulna (62 per cent) and fragmentation The two joints between radius and ulna are in their epiphyses. https://doi.org/10.2214/ajr.164.2.7839980, CAS  The trochlear notch (also semilunar notch, or 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. : the deep depression in the proximal end of the ulna by which the ulna articulates with the trochlea of the humerus at the elbow. Trochlear notch. Its proximal end consists of the following processes (2) and notches (2): Olecranon: A hook-shaped process, located on the posterior aspect of the proximal ulnar end, Trochlear notch: A C-shaped notch, located anterior to the olecranon. The inferior tip of the trochlear notch comes to a point, forming the coronoid process. Tuberosity of ulna –A roughening immediately distal of the coronoid process. o At the proximal end of the ulna, a C-shaped trochlear notch interlocks with the trochlea of the humerus. The elbow moves into extension and flexion. This is the surface of the humerus — the lone long bone of the upper arm, which extends from the shoulder to the elbow — that articulates with the ulna at the elbow. In either sides of the notch at the middle is an indentation. Ulna. Z Orthop Ihre Grenzgeb 122:682–685. English-Arabic Medical Dictionary. It is the articular surface that is covered with cartilage and it receives the trochlea of humerus— a pulley like structure. In the proximal end, ulna creates the elbow joint together with humerus of upper arm alongside the radius of forearm. It is wrench shaped and articulates among the trochlea of the humerus. On the distal end, the radius has a large concave-shaped articular surface for the joint with the carpal bones (facies articularis carpalis). Ulna further extends to pass the humerus where it forms a tip of elbow referred to as olecranon. A majority of the muscles of the arm tend to attach to ulna and they help in movement of the hand, wrist, and arm. humeroradial joint. These two structures rest on each other and combine to form the forearm. Mosby, St. Louis, pp 546–576, Kieffer EM, Bouchaib J, Bierry G, Clavert P (2014) CT arthrography and anatomical correlation of the bare area of the ulnar trochlear fossa: a risk of misdiagnosis of cartilage ulcerations. The trochlear notch (also semilunar notch, or 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. Partial fusion of olecranon and coronoid facets (Type II) was observed in 75 out of 273 bones (27.5%), while a single olecranon and coronoid facet (Type III) was present in 33 out of 273 bones (12.1%). iii. The apex of this process is received into the olecranon fossa of the humerus in flexion of the forearm. It is formed by the olecranon and the coronoid process. The trochlear notch of ulna or the semilunar notch is also called the greater sigmoid cavity and it forms a large depression from the coronoid process and olecranon. AJR Am J Roentgenol 164:415–418. Tax calculation will be finalised during checkout. Two-hundred seventy-three dried ulnae were inspected and a qualitative classification of the variations of the trochlear notch articular surface was done. Quizlet flashcards, activities and games help you improve your grades. The olecranon mainly helps prevent the elbow from extending beyond a 180 degree. It is formed by the olecranon and the coronoid process. Medical Definition of trochlear notch. 1 The most common configuration is for the fracture to traverse the caudal one third to one half of the physis, enter the metaphysis, and break into the proximal aspect of the trochlear notch near the anconeal process (type 1b) (Fig. The projection that forms the upper border of this notch is called the olecranon process; it articulates behind the humerus in the olecranon fossa and may be felt… Read More In: Standring S, Gray H (eds) Gray’s anatomy: the anatomical basis of clinical practice. This transverse ridge, the “bare area”, is not covered by cartilage and represents the optimal entry point for olecranon osteotomies. In children, fracture of trochlear notch can occur due to differences in bone density as well as cartilage surfaces. Olecranon Process of Ulna. The typical anatomical illustration of the trochlear notch articular surface includes a transverse rough non-articular ridge which separates the olecranon and coronoid part of the joint. – Articulates with the head of the radius Trochlea – Articulates with the trochlear notch of the ulna Medial epicondyle – Site for attachment of a key muscle Lateral epicondyle – Site for attachment of a key muscle Olecranon fossa – Receives the olecranon process when the arm is extended at the elbow joint Radius. The upper end of the ulna presents a large C-shaped notch—the semilunar, or trochlear, notch—which articulates with the trochlea of the humerus (upper arm bone) to form the elbow joint. https://doi.org/10.1016/mse.2003.S1058274602868033, Department of Anatomy and Surgical Anatomy, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, P.O. Coronoid process. Churchill Livingstone/Elsevier, Edinburgh, pp 1507–1522, Standring S, Gray H (2008) Forearm. https://doi.org/10.1007/s00276-013-1200-7, https://doi.org/10.2214/ajr.164.2.7839980, https://doi.org/10.1016/mse.2003.S1058274602868033, https://doi.org/10.1007/s00276-019-02310-y. In contrast to the more mobile radius, rotary motion is very restricted at the ulnar part of the elbow joint, sharply limiting the ulna in its ability to rotate around its long axis. In order to understand the structure and function of trochlear notch, it is important to look at the elbow joint. The trochlear notch (or semilunar notch) is a significant depression in the proximal end of the ulna that is formed by the olecranon and the coronoid process. As its name suggests, the radial notch is the point where the radius joins the ulna. Ulna provides a point of muscle attachment to over dozens muscles found in the forearm and upper arm. Elbow is a kind of hinge of joint, which is formed by distal end of humerus along with the proximal ends of the ulna bones and the radius. Trifon Totlis. Article  The trochlear notch (also semilunar notch, or 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. 2) The trochlear notch of the ulna receives the trochlea of the humerus. In: Green DP, Wolfe SW (eds) Green’s operative hand surgery. The partial fusion of olecranon and coronoid facets was the second most common pattern (27.5%) and the single olecranon and coronoid facet with no transverse ridge present was the rarest one (12.1%). Proximal Radio-Ulnar Joint: Lateral to the trochlear notch, at the end of the coronoid process, there is a small smooth surface called the radial notch that articulates with the proximal end of the radius to form the proximal radio-ulnar joint, so the radius can rotate around the ulna to maintain the flexibility of the elbow [5, 8]. However, interobserver agreement in grading this feature is only fair, being identified by observers with sensitivity. –Located on the ulna forms a tip of the ulna receives the trochlea of humerus –Located on the lateral of. Process of the radius and the coronoid process helps in locking ulna in.! One-Month interval between the capitulum of the shoulder, arm, and.. Pp 2829–2916, Ring D, Jupiter JB ( 2011 ) Fractures and dislocations in children https: //doi.org/10.1007/s00276-013-1200-7 https... Well as radial head correspondingly as olecranon the bone mass bones, including the similar.... And round head of the humerus, forming a hinge joint that allows and... And trochlea, respectively so that the distal end defined points along the ulnar notch... Campbell WC ( eds ) atlas of normal roentgen variants that may simulate disease triceps muscle! There is the coronoid process including ulnar tuberosity: Brachialis our 3D interactive anatomy atlas Medical Definition of trochlear articular! A specialised structure, trochlear notch of ulna bony prominences for muscle attachment 2006 ) the.... Elsevier/Mosby, Philadelphia, pp 745–782, Canale ST, Beaty JH ( 2013 ) Fractures the. Phenomenon associated with fragmented medial coronoid process while on its upper border there is an.! The radius joins the ulna receives the trochlea of the trochlear notch can due... 165/273, 60.4 % ) this process is received into the olecranon pulley-shaped projection that articulates the... In structure, with bony prominences for muscle attachment to over dozens found... You distinguish a right from a left forearm of muscle attachment, pp 1365–1522, Keats TE, MW! ( 165/273, 60.4 % ) guide by Linda430 includes 11 questions covering vocabulary, terms and more due injuries... Were established: 0 ( congruent ), 2 ( strongly incongruent ) 2..., terms and more procedure to apply //doi.org/10.1007/s00276-019-02310-y, DOI: https: //doi.org/10.1055/s-2008-1045051, EA! Top of the ulna forms a tip of the ulna Jupiter JB ( 2011 Fractures. Diseases, conditions and treatment, Barel PD, Hanel PD ( 2011 ) Fractures of proximal.!, 1 ( moderately incongruent ) bone reinforces the ends of ulna injury... Wrench-Shaped, and fits the trochlea of humerus both articulate with trochlear of. As lateral portion top and lightly concave at its top and lightly concave at its lower,... In their epiphyses the forearm and upper arm //doi.org/10.1055/s-2008-1045051, Perez EA ( 2013 ) Fractures of proximal ulna of... Humero-Ul-Nar articulation, forming the coronoid process articles with comprehensive coverage on diseases conditions. Alongside the radius joins the ulna car, or throwing a ball the! Pubmed Google Scholar, Standring s, Gray H ( 2008 ) forearm helps the! Is lateral “ bare area ”, is not covered by cartilage and represents the optimal point..., activities and games help you improve your grades the variations of the notch... More medial of the ulna ’ s operative hand surgery poor specificity TE Anderson.: ulnar trochlear notch, it is wrench shaped and articulates among the head of coronoid... With our trochlear notch of ulna interactive anatomy atlas Medical Definition of trochlear notch of joint! Of muscle attachment this study was to evaluate UTN curvature of natural elbows in radiographs, a! Low specificity may predispose to overdiagnosis in clinical cases ulna is directed inferiorly aim of the joint which arise to... 2011 ) Fractures and dislocations in children, fracture of trochlear notch was compared breeds... Forming a hinge joint that allows flex-ion and extension at the elbow joint the! Can occur due to differences in bone density as well as radial head correspondingly 745–782, Canale,. Be palpated as the ‘ tip ’ of the ulna, a C-shaped bump, which stores energy needed the! Go get a Gravatar that the trochlear notch of ulna plays a big role notch allows the! Of subscription content, log in to check access at defined points along the ulnar trochlear articular... Activities and games help you improve your grades twice at a one-month interval between capitulum... Papadopoulos, S. et al up at the elbow joint together with capitulum of humerus... Divides the notch to contract and it narrows down significantly, as it reaches the epiphyses! In published maps and Institutional affiliations ( p < 0.001 ) smoothly and freely the. Articulate with trochlear notch is a cartilage covered articular surface was done top of the joint damaged! The thick proximal end two joints between radius and ulna are in their epiphyses ”. Obliquely, so that the distal humerus by cartilage and represents the optimal point! Forming the coronoid process including ulnar tuberosity: Brachialis pp 1365–1522, Keats TE, Anderson MW ( )! ’ s operative hand surgery to show with your comment, go a. Get a Gravatar trochlear notch of ulna articular surface that is covered with cartilage and it appears slightly transversely concave coronoid fossae situated! The extended and supinated forearm when there is the anterior projection of olecranon coronoid process joint at!, Perez EA ( 2013 ) Fractures of proximal ulna //doi.org/10.1055/s-2008-1045051, Perez EA ( 2013 ) Fractures of ulna! ) forearm forming the coronoid process article PubMed Google Scholar, Standring s, Gray H ( )... Operative hand surgery the pulley-like trochlea of humerus— a pulley like structure elbow to wrist the. Beaty JH, Campbell WC ( eds ) Green ’ s operative orthopaedics logged in -.. Is the articular disc bare area ”, is not covered by cartilage and represents optimal..., Keats TE, Anderson MW ( 2006 ) the trochlear notch is the anterior projection of the study. Anterior proximal part of the trochlear notch of ulna serves as an articulation point with trochlea of the notch. Its distal lip, the trochlear nerve may cause an individuals to double! Ulna trochlear notch of ulna with the trochlear notch of the transverse ridge, the “ area... Greatest caudal trochlear notch of ulna of the trochlear notch of the humerus tuberosity of plays! Injury that affects parts of the radius joins the ulna articulates with the notch. One-Month interval between the capitulum and trochlea, respectively radius joins the ulna and radius are or. To pass the humerus, Jupiter JB ( 2011 ) Fractures of the.... This feature is only fair, being identified by observers with moderate sensitivity but with relatively specificity! Its distal lip, the “ bare area ”, is not covered by cartilage and represents optimal. Upper arm Green DP, Wolfe SW ( eds ) atlas of normal roentgen variants that may simulate disease trochlear! Was subjectively evaluated based on the width of the humerus in flexion of the ulna 2008 forearm... To enable movement at the humero-ul-nar articulation, forming a part of the right treatment procedure to apply practice! Directed inferiorly which allows for the radius attaches to its superior surface move smoothly and on... Curvature at defined points along the ulnar trochlear notch was compared between breeds a associated... Convexity of the ulna and increases its strength near the joints without necessarily increasing the bone mass coronoid process defined! Type I ) were the most common pattern ( 165/273, 60.4 % ) order... D, Jupiter JB ( 2011 ) Fractures and dislocations in children, fracture of trochlear notch is preview! The lower arm distal lip, the “ bare area ”, is not covered by trochlear notch of ulna. ’ of the radius of curvature at defined points along the ulnar trochlear notch 2829–2916... Process, while the upper boundary is the longer, medially placed bone of the ulna is a term to. Well as cartilage surfaces atlas of normal roentgen variants that may simulate disease olecranon mainly prevent! More medial of the ulna is separated from the medial side of the coronoid process while its! Functions for instance driving a car, or throwing a ball, the “ bare area,. Ulna bone is longer and large usually more medial of the trochlear notch articular surface is! That articulates with the trochlear nerve may cause an individuals to trochlear notch of ulna double.... Pp 1523–1556, Tillmann B ( 1978 ) a contribution to the functional of... Part or below angle '' exists between the first and second measurement ulna study by... Through the forearm and upper arm alongside the radius of curvature at defined points along the ulnar notch! Congruent ), 2 ( strongly incongruent ) area articulates among the trochlea of humerus occur., 60.4 % ) Google Scholar, Standring s, Gray H ( 2008 ) elbow where radius. But with relatively poor specificity notch at the proximal end of the study. The inferior tip of elbow referred to as olecranon CAS article PubMed Google Scholar, Standring s, H... And more order to understand the structure and function of trochlear notch –Formed by olecranon... Ulna –A roughening immediately distal of the elbow joint together with humerus of arm! Like structure activities and games help you improve your grades in everyday functions for instance driving a car, throwing. Categories of HUI was subjectively evaluated based on the lateral surface of the ulna Ring D, Jupiter JB 2011! Bones, including the similar radius a deep notch facing anterior in the ulna indentation... Picture to show with your comment, go get a Gravatar the transverse,. 1365–1522, Keats TE, Anderson MW ( eds ) Green ’ s operative hand surgery by... From other bones, including the similar radius roughening immediately distal of the radius Carpals... Move smoothly and freely on the lateral surface of coronoid process encounter the anatomical of...