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The index finger used for palpation follows between the second and third metacarpals to the distal radius. These tissue attachments generally allow two morphologically and functionally different fracture types with ulnar styloid injury. Tendon snaps back into place when the hand is turned palm down. Thus the TFCC is composed of a vascularized portion and a nonvascularized portion. First of all, ulnar-sided wrist pain is located on the little finger side. The ulnar collateral ligament of the wrist joint is a rounded cord. ulnar styloid fractures or none at all showed ï¬ exion of 87%, ex-. Compare to the other side. ulnar styloid and distal ulna fractures. 4. The fovea is situated between the ulnar styloid process and the flexor carpi ulnaris tendon. Painful snapping of the wrist with twisting movements. Radial & Ulnar Collateral Ligaments . On all surgical dissections, the radial collateral ligament was present at the floor of the first extensor compartment and the ulnar collateral ligament was at the floor of the sixth extensor compartment. Normally, the ECU tendon runs within a smooth sheath along a groove on the side of the wrist joint. To define an excessively long ulnar styloid in this study, the ulnar styloid process index (USPI), described by Garcia-Elias, was used [9, 10]. Not exactly a household word. central column model on a sagittal plane. A rounded process known as the head of the ulna forms the distal radioulnar joint with the concave ulnar notch of the radius. Palmar Radiocarpal Ligament. On all surgical dissections, the radial collateral ligament was present at the floor of the first extensor compartment and the ulnar collateral ligament was at the floor of the sixth extensor compartment. In one case surgical exploration revealed that the ulnar styloid, triangular fibrocartilage, and extensor carpi ulnaris tendon had dislocated into the DRUJ as a unit. The head presents an articular surface, part of which, of an oval or semilunar form, is directed downward, and articulates with the upper surface of the triangular articular disk which separates it from the wrist-joint; the remaining portion, directed lateralward, is narrow, convex, and received into the ulnar notch of the radius. Relative contributions of the ulnar attachments of the triangular fibrocartilage complex to the dynamic stability of the distal radioulnar joint. The ulnar styloid process is a continuation of the prominent subcutaneous ridge of the shaft of the ulna, ... d Type ID, lateral avulsion lesion with tears of the radioulnar ligament and articular disk attachments to the radius. 2). of the ulnar styloid, the ï¬ bers are oriented horizontally. College of Allied Health Science ANATOMY MUSCULOSKELETAL RADIUS & ULNA, ELBOW AND RADIOULNAR JOINT HERMIZAN BIN HALIHANAFIAH Bsc Biomedicine (Hons) UKM Foveaâdepression at the base of the ulnar styloid process, has attachment for the triangular fibrocartilage cartilage complex (TFCC) Has a groove for the extensor carpi ulnaris (ECU) tendon. Go to: Materials and methods. The MRI signal of this hyaline-like cartilage at the ligamentous attachment to the tip of the ulnar styloid process is intermediate intensity on coronal GRE and PD sequences, as a normal appearance (Fig. Compare to the other side. - See: Ligaments of the Wrist - Anatomy of TFCC: - consists of articular disc (triangulyar fibrocartilage), meniscus homologue (lunocarpal), ulnocarpal ligament, dorsal & volar radioulnar ligament, and ECU sheath; - it originates from firm attachments on medial border of distal radius and inserts into the base of the ulnar styloid; - it separates the radiocarpal from the distal radioulnar joint; modified ovoid joint. primary stabilizers. Mild wrist joint effusion with extension of the joint effusion into the distal radio-ulnar joint. The larger of the two muscular attachments that cover the distal end of the shaft on its medial surface is that of pronator quadratus muscle. Greenâs Operative Hand Surgery. It is an attachment point for the ulnar collateral ligament, which connects the ulna to the triquetral and pisiform carpal bones at the wrist. The ECU tendon, stabilized by the hypoechoic subsheath , is the most superficial structure of the TFCC and inserts on the fifth metacarpal base. To define an excessively long ulnar styloid in this study, the ulnar styloid process index (USPI), described by Garcia-Elias, was used [9, 10]. The procedure includes removing of distal 2 - 4 mm of ulnar head with an osteotome, including articular cartilage and subchondral bone while preserving the ulnar styloid process and all TFCC attachments. Anatomy: posterior radius/ulna ⢠Radial head ⢠Muscle attachments (insertions in gray; origins in pink) ⢠Radial styloid ⢠Ulnar olecranon process ⢠Ulnar styloid. https://www.thieme-connect.com/products/ejournals/html/10.1055/s-0039-1691827 It attaches to the fovea region of the ulnar head, which is a slight depression at the base of the ulnar styloid process. Ulnar styloid impaction refers to a condition causing that pain because there is a short ulna (one of the two bones of the forearm) and a long styloid. Listerâs tubercle is located in the middle of the distal radius, slightly proximal/ulnar to the radial styloid process. Listerâs tubercle can be felt directly as a prominent bony tuberosity at the dorsal radial surface. The ulnar styloid is an important supportive structure of the triangular fibrocartilage complex (TFCC). Anatomy: ligaments! Listerâs tubercle can be felt directly as a prominent bony tuberosity at the dorsal radial surface. 2014; 45:1889â1895. New York: Churchill-Livingstone, 1993:988.) DRUJ. However, the location of the distal ulnar styloid process (short block arrow) and the ECU can be appreciated on this image. The styloid process of the temporal bone is a slender osseous projection that points anteroinferiorly from the inferior surface of the petrous part of the temporal bone. Ulnar collateral ligament wrist function Uncategorized / September 20, 2020 / / September 20, 2020 / First of all, ulnar-sided wrist pain is located on the little finger side. Tsai PC, Paksima N. The distal radioulnar joint. The ulnar styloid process is a continuation of the prominent subcutaneous ridge of the shaft of the ulna, which projects distally toward the triquetral bone for a variable distance (2â6 mm) (, 37). Triquetral fractures are carpal bone fractures generally occuring on the dorsal surface of the triquetrum. Hello, The pain you are describing occurs in about 50% of all wrist fractures. 1). The ulnar collateral ligament is a rounded cord, attached above to the end of the styloid process of the ulna, and dividing below into two fasciculi, one of which is attached to the medial side of the triangular bone, the other to the pisiform and transverse carpal ligament. The head articulates among the ulnar notch of the radius to make the distal radio-ulnar joint. Galeazzi fractures . Provides an attachment point for the ulnar collateral ligament of the wrist. J Hand Surg Am 2002;27(1):61â67. The radial and the ulnar styloid processes are located at the wrist end of the ulna and the radius bone, and they serve as attachment points for ligaments and tendons that extend to the muscles of the forearms. Ulnar styloid impaction refers to a condition causing that pain because there is a short ulna (one of the two bones of the forearm) and a long styloid. J Hand Surg Am 2002;27(1):61â67. Is a thick, rough ligament that limits wrist extension. At the end of ulna bone called head of ulna, towards wrist, there is an elevated projection known as the styloid process. Relative contributions of the ulnar attachments of the triangular fibrocartilage complex to the dynamic stability of the distal radioulnar joint. triangular fibrocartilage complex . Attaches to the styloid process of the ulna and to the pisiform and triquetrum. (Redrawn from Bowers WH. Attachments for the intrinsic ligaments of the wrist. Lateral view of ulna. It is received into the coronoid fossa of the humerus in elbow flexion. The ulna is a long bone in the forearm. A nutrient artery of the ulna, which is a branch of the ulnar ⦠MRI. These ligaments provide lateral and medial support, respectively, to the wrist joint. They are the second commonest carpal bone fracture, after the scaphoid. First of all, ulnar-sided wrist pain is located on the little finger side. Nutrient foramen of ulna. Attachments. 19) ... An analysis of the constraint properties of the distal radioulnar ligament attachments to the ulna. On the ulnar side, the attachments are very difficult to be appreciated at this level. Proximally, the triangular fibrocartilage attaches to the ulnar aspect of the lunate fossa of the radius, ulnar head and ulnar styloid process. Styloid process of the ulna (processeus styloideus ulnae) is a small projection that descends from the posterior portion of the ulnar head. It is a form of raphide. Anatomy: anterior ulna ⢠Trochlear notch ⢠Coronoid process ⢠Olecranon process ⢠Muscle attachments ⢠Ulnar head ⢠Ulnar styloid process. The meticulous histological analysis of the radioulnar ligaments by Nakamura and colleagues 1 reveals two predominant attachments to the distal ulna: the fovea and the base of the ulnar styloid process. Extension of the ulnar ossification center into the styloid process of an 11-year-old. In pronation (figure 55b), the radial styloid process is still palpable, but on the medial side of the wrist â it is the head, and not the styloid process, of the ulna that is now palpable on the lateral side.Injection into the wrist joint is from the dorsal surface, just medial to the dorsal tubercle, where the extensor pollicis longus turns laterally around it (figure 56). 5th metatarsal of the foot - also known as the tuberosity of the fifth metatarsal; In botany, a styloid is a needle-shaped crystal of calcium oxalate found in some plants. attachments of the radioulnar ligaments. The direction and attachment of the radioulnar ligaments on the styloid process were confirmed using MRI for younger and healthy participants. Extraarticular fracture of the ulnar styloid process. The direction and attachment of the radioulnar ligaments on the styloid process were confirmed using MRI for younger and healthy participants. In anatomy, a styloid process (from Greek stylos (ÏÏῦλοÏ), "pillar"), usually serving as points of attachment for muscles, refers to the slender, pointed process (protrusion) of: . The procedure includes removing of distal 2 - 4 mm of ulnar head with an osteotome, including articular cartilage and subchondral bone while preserving the ulnar styloid process and all TFCC attachments. Although most of the dogs in this study did not develop angulation secondary to the uniform insult to the distal radial physis, concomitant distal displacement of the ulnar styloid process resulted in a varus deformity with internal rotation of the carpus in 3 of 8 dogs. Not exactly a household word. Slightly inferior to it on the opposite side sits the insertion of the brachioradialis muscle, which is just above the styloid process- an extrusion of the suprastyloid crest. The coronoid process is a horizontal, bony projection which attaches directly onto the ulnar shaft. Ulnar styloid impaction refers to a condition causing that pain because there is a short ulna (one of the two bones of the forearm) and a long styloid. One type is a fracture of the ulnar styloid tip, in which the TFCC remains intact; the other type is a styloid base fracture, which is the result of an avulsion of the ulnar TFCC attachment [ 5 ]. The coronoid process also forms the lower part of the semi-lunar notch. These ligaments provide lateral and medial support, respectively, to the wrist joint. Distally, the ulna articulates with the radius, forming the distal radio-ulnar joint. Lunatomalacia (Kienböck disease) With only the tip of the styloid fractured, the TFCC will remain intact, since its major attachments are at the base of the styloid, and the DRUJ will remain stable.The more complicated fracture of the ulnar styloid is the result of an avulsion of the ulnar attachment of the TFCC, a ⦠The result of this fine-scale architecture and complex geometry is that precise wrist imaging and interpretation of the images are challenging diagnostic problems. Re: pain n tenderness at ulnar styloid process. E. The styloid is fully ossified and the epiphyses have capped their relative metaphyses in this 13-year-old boy. It acts to prevent excessive ulnar (medial) deviation of the hand. Anatomy. However, the location of the distal ulnar styloid process (short block arrow) and the ECU can be appreciated on this image. Anatomy: ligaments! The ulnar collateral ligament was seen between ulnar styloid process and the triquetrum. Ulnar collateral ligament wrist function Uncategorized / September 20, 2020 / / September 20, 2020 / 4. The bone is known as the distal radius and fractures associated with it are known as distal radius fractures. Painful snapping of the wrist with twisting movements. Although most of the dogs in this study did not develop angulation secondary to the uniform insult to the distal radial physis, concomitant distal displacement of the ulnar styloid process resulted in a varus deformity with internal rotation of the carpus in 3 of 8 dogs. Although conser-vative treatment is conducted initially, excision of the styloid process and synovectomy are performed for refractory cases. It is mostly unremarkable, terminating in a rounded head, with distal projection â the ulnar styloid process. The triquetral may be fractured by means of impingement from the ulnar styloid, shear forces, or avulsion from strong ligamentous attachments. ulna bone of the lower arm - Ulnar styloid process; Third metacarpal - Third metacarpal styloid process; Tibia and Fibula - Tibial process, fibular process. Joints of the Elbow. The majority of the cartilage articulating with the sigmoid notch of the radius is retained to preserve DRUJ function. Attachments. The majority of these attachments are at the base of the ulnar styloid or fovea, t2-16 allowing two morphologically and functionally different fractures of the styloid.A blow to the dorsal or ulnar wrist may fracture the tip of the ulnar styloid (Fig. In spite of acting as a unique strut on the ulnar end to stabilize the ulnar soft tissue and maintain the congruency of the distal radioulnar joint (DRUJ), the majority of these connected tissues including the triangular fibrocartilage complex (TFCC) are at the base of the ulnar styloid or fovea [2,3,4]. Signs of ECU subluxation include: 1 . These are classified by AO/OTA as 2U3A1.1 if the fracture is at the tip, or 2U3A1.2 if the fracture is at the base. Fluid within the pre-styloid recess is seen (arrowhead). What is ulnar styloid impaction syndrome? The styloid process of the ulna is found at distal end of the forearm, and projects from the medial and back part of the bone; it descends a little lower than the head, and its rounded end affords attachment to the ulnar collateral ligament of the wrist. FIGURE 9-3 Articulations of the distal radioulnar joint. Patients with these fractures present with a limited range of motion, grip weakness, and ulnar-sided wrist pain that is exacerbated by ulnar deviation and twisting the wrist. In pronation (figure 55b), the radial styloid process is still palpable, but on the medial side of the wrist â it is the head, and not the styloid process, of the ulna that is now palpable on the lateral side.Injection into the wrist joint is from the dorsal surface, just medial to the dorsal tubercle, where the extensor pollicis longus turns laterally around it (figure 56). It is found deep to the overlying extensor carpi ulnaris tendon 2-5. Radial collateral â Runs from the radial styloid process to the scaphoid and trapezium. ulnar styloid and distal ulna fractures. The radioulnar ligaments were attached to the dorsoradial ridge of the styloid process, which was confirmed by cortical bone thickening, histology at the attachment sites, and in vivo MR imaging. Haugstvedt JR, Berger RA, Nakamura T, Neale P, Berglund L, An KN. ulnar impaction syndrome . Proton density-weighted MR image (TR/TE, 2,430/34) The ulnar collateral ligament of the wrist joint (internal lateral ligament, ulnar carpal collateral ligament) is a rounded cord, attached above to the end of the styloid process of the ulna, and dividing below into two fasciculi, one of which is attached to the medial side of the triquetral bone, the other to the pisiform and flexor retinaculum. The alignment of these joint-forming processes allows the radius to rotate around the ulna at the wrist. 3A â41-year-old man with noncommunicating tear at ulnar insertion of triangular fibrocartilage, fracture of distal radius, and avulsion of ulnar styloid process in left wrist due to fall 10 days before examination. It falls slightly lower than the head. e Type II lesion, degenerative in nature and tends to occur in the central avascular region. A retrospective study was performed on five patients diagnosed with ulnar styloid impingement syndrome. Palmar and dorsal radioulnar ligaments, which are parts of the TFCC, extend from the sigmoid notch of the radius to converge in a triangular configuration to attach to the ulna. Thus the TFCC is composed of a vascularized portion and a nonvascularized portion. (Redrawn from Bowers WH. Thereâs a bony projection at the end of the ulna, near your hand, called the ulnar styloid process. Simply place your hand on a bathroom scale with the elbow straight and push down to the point of pain. attachments of the radioulnar ligaments. Anatomy: anterior ulna ⢠Trochlear notch ⢠Coronoid process ⢠Olecranon process ⢠Muscle attachments ⢠Ulnar head ⢠Ulnar styloid process. proximal and distal - within wrist and at TFCC. GENERAL FEATURES OF THE HUMERO-ULNAR AND HUMERORADIAL JOINTS. Fig. Tenderness in the anatomical snuffbox is suggestive of scaphoid fracture. Fractures of the ulnar styloid commonly accom- pany distal radius fractures, or they may occur as an isolated injury from a blow to the dorsal or ulnar wrist. Ulnar styloid fractures are often overlooked or treated simply with immobilization unless a disloca- tion of the distal radioulnar joint (DRUJ) is recog- nized. On the lateral side of the coronoid process is the radial notch where the head of the radius sits. The radioulnar ligaments were attached to the dorsoradial ridge of the styloid process, which was confirmed by cortical bone thickening, histology at the attachment sites, and in vivo MR imaging. It attaches to the fovea region of the ulnar head, which is a slight depression at the base of the ulnar styloid process. Originating from the sigmoid notch of the radius is the avascular articular disc, whereas the peripheral part is vascularized and consists of a deep and superficial lamina that inserts in the ulnar fovea and at the ulnar styloid process, respectively [2, 3]. They are the second commonest carpal bone fracture, after the scaphoid. Muscle Attachments Shoulder and Arm. Essex-Lopresti injuries. The articular disc appears hypoechoic and tapers from its superficial portion to the deep attachment on the radius. The patients suffered from ulnar sided-wrist pain. 2,9,10 From the fovea, the ulnocapitate ligament passes distally, just anterior to the junction between the other ulnocarpal ligaments, until it reaches the lunotriquetral joint. The transducer is positioned between the ulnar styloid process and the triquetrum, parallel to the hyperechoic ECU tendon. The RSCL originates with abroad base at the styloid process of the radius and extends in a diagonal direction on the palmar side first through the groove in the middle third of the scaphoid (âscaphoid waistâ), from which it is separated by a synovial duplication. central column model on a sagittal plane. The styloid process projects from the medial and back part of the bone; it descends a little ⦠J Hand Surg Am 2006; 31:445â451 [Google Scholar] 7. arthrology. The styloid process of the temporal bone is a slender osseous projection that points anteroinferiorly from the inferior surface of the petrous part of the temporal bone. Normally, the ECU tendon runs within a smooth sheath along a groove on the side of the wrist joint. TFCC . Scaphoid. It lies medially and parallel to the radius, the second of the forearm bones.The ulna acts as the stabilising bone, with the radius pivoting to produce movement.. Proximally, the ulna articulates with the humerus at the elbow joint. The articular disc appears hypoechoic and tapers from its superficial portion to the deep attachment on the radius. Scaphoid fractures, scapholunate ligament injury, and fractures of the ulnar styloid process are injuries associated with distal radius fractures, given their anatomic proximity to the distal radius. Radial styloid process location of the symptoms relating to the underlying anatomical structures... Normal Wrist (frontal) -- Identify: radial styloid, ulnar styloid, navicular (scaphoid), lunate,... C PA radiograph of the wrist with scaphoid deviation. The procedure includes removing of distal 2 - 4 mm of ulnar head with an osteotome, including articular cartilage and subchondral bone while preserving the ulnar styloid process and all TFCC attachments. Triquetral fracture. arthrology. The ECU tendon, stabilized by the hypoechoic subsheath , is the most superficial structure of the TFCC and inserts on the fifth metacarpal base. The fovea also is a point of attachment for the dorsal and palmar radioulnar ligaments. The ulnar collateral ligament was seen between ulnar styloid process and the triquetrum. Attaches to the styloid process of the ulna and to the pisiform and triquetrum. Palmar and dorsal radioulnar ligaments, which are parts of the TFCC, extend from the sigmoid notch of the radius to converge in a triangular configuration to attach to the ulna. The ulnar styloid may be avulsed at its tip, or through its base (basi-styloid fracture). There is also a radial notch for the head of the radius, and the ulnar tuberosity to which muscles attach. Go to: Materials and methods. The transducer is positioned between the ulnar styloid process and the triquetrum, parallel to the hyperechoic ECU tendon. Fluid within the pre-styloid recess is seen (arrowhead). Joints of the Elbow. At the end of the ulna, there is the styloid process, often referred to simply as the styloid. This styloid process of the ulna protects towards the wrist, with the rounder end of the bone attaching the ulna to the ulnar collateral ligament of the wrist. FIGURE 9-3 Articulations of the distal radioulnar joint. 1). ulna bone of the lower arm - Ulnar styloid process; Third metacarpal - Third metacarpal styloid process; Tibia and Fibula - Tibial process, fibular process. Radial collateral â Runs from the radial styloid process to the scaphoid and trapezium. But certainly one that patients with ulnar-side wrist pain become familiar with rather quickly. Styloid process of ulna. The ulnar styloid process fractures were divided into tip or base depending on the anatomical position. The individual alignment of various articular fracture fragments of the distal radius is affected by these soft tissue attachments . Attachments. ARTHROLOGY. This is an avulsion fracture of the ulnar styloid. College of Allied Health Science ANATOMY MUSCULOSKELETAL RADIUS & ULNA, ELBOW AND RADIOULNAR JOINT HERMIZAN BIN HALIHANAFIAH Bsc Biomedicine (Hons) UKM The ECU tendon subsheath is also ï¬ rmly attached to the dorsal aspect of the fovea by Sharpey ï¬ bers.5 In contrast, the ulnocarpal ligaments do not have any Sharpey ï¬ bers. Debridement or repair of the TFCC is also performed. Tendon snaps back into place when the hand is turned palm down. On This Page: Bones and Bony Landmarks | Muscles. 19) ... An analysis of the constraint properties of the distal radioulnar ligament attachments to the ulna. Type ID lesions may have an associated sigmoid notch fracture. The ulnar notch of the distal radius accepts the ulnar head at the distal radio-ulnar joint. The radiocarpal joint is what kind of joint? articulation occurs between the ulnar head and sigmoid notch (a shallow concavity found along ulnar border of distal radius) most stable in supination. Ulnar styloid fractures occur in association with ~60% of distal radius fractures. Ulnar styloid process nonunion and outcome in patients with a distal radius fracture: a meta-analysis of comparative clinical trials. On the ulnar side, the attachments are very difficult to be appreciated at this level. Garcia-Elias (, 38) has developed a method of assessing the relative size of the process called the ulnar styloid process index (USPI) (, Fig 15). Galeazzi fractures . The index finger used for palpation follows between the second and third metacarpals to the distal radius. The ulnar collateral ligament of the wrist joint (internal lateral ligament, ulnar carpal collateral ligament) is a rounded cord, attached above to the end of the styloid process of the ulna, and dividing below into two fasciculi, one of which is attached to the medial side of the triquetral bone, the other to the pisiform and flexor retinaculum. 4. This complex architecture is essential to the function and stability of the wrist. Radial & Ulnar Collateral Ligaments . Tsai PC, Paksima N. The distal radioulnar joint. The ulnar styloid process is a continuation of the prominent subcutaneous ridge of the shaft of the ulna, ... d Type ID, lateral avulsion lesion with tears of the radioulnar ligament and articular disk attachments to the radius. e Type II lesion, degenerative in nature and tends to occur in the central avascular region. The majority of the cartilage articulating with the sigmoid notch of the radius is retained to preserve DRUJ function. 4. Fig. The elbow consists of the humero-ulnar ⦠The ulnar collateral ligament is a rounded cord, attached above to the end of the styloid process of the ulna, and dividing below into two fasciculi, one of which is attached to the medial side of the triangular bone, the other to the pisiform and transverse carpal ligament. - ulnar styloid process and its attachment to the ulnar collateral ligament may be preserved; - bevel any sharp edges; - remnants of the TFCC are opposed to the wrist capsule and the radius; - remnants of the wrist capsule are anchored to the distal ulna; The triquetral may be fractured by means of impingement from the ulnar styloid, shear forces, or avulsion from strong ligamentous attachments. The prominent styloid process projects from the lateral surface of the distal radius, extending approximately 1 cm farther distal than the ulnar styloid process. Red flags. The foveal attachmentâjust radial to the base of the ulnar styloidâis over a broad area and gives rise to near-vertical fibers. Essex-Lopresti injuries. Re: pain n tenderness at ulnar styloid process. TFCC stands for. But certainly one that patients with ulnar-side wrist pain become familiar with rather quickly. The end result was poor. The distal end of the ulna is greatly smaller in diameter than the proximal end. 10). By TeachMeSeries Ltd (2021) Fig 2 â Palmar view of the ligaments of the wrist joint. Lunatomalacia (Kienböck disease) New York: Churchill-Livingstone, 1993:988.) The head is separated from the styloid process by a depression for the attachment of the apex of the triangular articular disk, and behind, by a shallow groove for the tendon of the extensor carpi ulnaris muscle. The prominent styloid process projects from the lateral surface of the distal radius, extending approximately 1 cm farther distal than the ulnar styloid process. Radius, Ulna, Elbow and Radioulnar Joint 1. Debridement or repair of the TFCC is also performed. What Is Ulnar Styloid Impaction Syndrome? Fracture of Radial styloid process and base of 5th metacarpal bone (260) Model Picture or Video Triquetrum Vulnerable to injury, ranking 3rd highest of all the carpal bones in incidence of a... Triquetrum Vulnerable to injury, ranking 3rd highest of all the carpal bones in incidence of a... Model Picture or Video Extension Supine, G-H in 0 0 flex, ext, abd. 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