Pronator Quadratus Revisited

1996 ◽  
Vol 21 (6) ◽  
pp. 714-722 ◽  
Author(s):  
P. R. STUART
Keyword(s):  
Functional Significance ◽  
Distal Radioulnar Joint ◽  
Prime Mover ◽  
Microscopic Anatomy ◽  
Pronator Quadratus ◽  
Radioulnar Joint ◽  
Dynamic Stabilizer ◽  
Pronator Quadratus Muscle

The pronator quadratus muscle has been neglected to a great extent in the anatomical and functional literature. This study confirms the consistent presence of two distinct heads to the muscle, and defines the gross and microscopic anatomy. The functional significance of these heads has been studied using in vitro and in vivo techniques to demonstrate that the superficial head is the prime mover in forearm pronation, and that the deep head is a dynamic stabilizer of the distal radioulnar joint.

PROXIMAL ULNAR STUMP STABILITY AFTER USING THE PRONATOR QUADRATUS MUSCLE TRANSFER COMBINED WITH THE SUAVÉ-KAPANDJI PROCEDURE IN RHEUMATOID WRIST

Hand Surgery ◽  
2014 ◽  
Vol 19 (01) ◽  
pp. 25-32 ◽  
Author(s):  
Chairoj Uerpairojkit ◽  
Somsak Leechavengvongs ◽  
Kanchai Malungpaishorpe ◽  
Kiat Witoonchart ◽  
Panai Buddhavibul
Keyword(s):  
Sagittal Plane ◽  
Distal Radioulnar Joint ◽  
Muscle Transfer ◽  
Pronator Quadratus ◽  
Radioulnar Joint ◽  
Rheumatoid Wrist ◽  
Joint Disorder ◽  
The Mean ◽  
Pronator Quadratus Muscle

The pronator quadratus muscle transfer combined with the Sauvé-Kapandji procedure was used to treat the distal radioulnar joint disorder in ten rheumatoid wrists for prevention against instability of the proximal ulnar stump. All patients were female with a mean age of 46.6 years. The mean follow-up time was 24.2 months. Postoperatively, supination increased in all patients with a mean of 50 degrees. Pain decreased significantly and none complained of prominence of the proximal ulnar stump in normal pronated position and during a tight grip. The wrist radiographs of both coronal and sagittal planes in normal and stress fisting views were used to evaluate the postoperative static and physiologic loaded stability of the proximal ulnar stump. It had shown this procedure provided good static proximal ulnar stump stability in both coronal and sagittal planes. However, in physiologic loaded condition, it was able to provide stability only in the sagittal plane.

IRREDUCIBLE CHRONIC PALMAR DISLOCATION OF THE DISTAL RADIOULNAR JOINT – A CASE REPORT

Hand Surgery ◽  
2005 ◽  
Vol 10 (02n03) ◽  
pp. 319-322 ◽  
Author(s):  
Y. Kikuchi ◽  
T. Nakamura ◽  
Y. Horiuchi
Keyword(s):  
Case Report ◽  
Rare Case ◽  
Distal Radioulnar Joint ◽  
Dynamic Force ◽  
Ulnar Styloid ◽  
Pronator Quadratus ◽  
Radioulnar Joint ◽  
Ulnar Head ◽  
The Stability ◽  
Pronator Quadratus Muscle

We report a rare case of irreducible chronic palmar dislocation of the distal radioulnar joint (DRUJ). This case showed that the dislocated ulnar head was impacted to the palmar cortex of the radius probably due to the dynamic force of the pronator quadratus muscle. Re-attachment of the ulnar styloid and partial resection of the ulnar head were necessary to make the reduction of the DRUJ possible. The continuity of the radioulnar ligament to the ulnar head was restored and the stability of DRUJ was maintained after reduction.

An Anatomical Study of the Anterior Interosseous Nerve and its Innervation of the Pronator Quadratus Muscle

2005 ◽  
Vol 30 (6) ◽  
pp. 635-637 ◽  
Author(s):  
I. SVÍŽENSKÁ ◽  
I. ČIŽMÁŘ ◽  
P. VIŠŇA
Keyword(s):  
Distal Part ◽  
Wrist Joint ◽  
Anatomical Study ◽  
Distal Radioulnar Joint ◽  
Dorsal Approach ◽  
Pronator Quadratus ◽  
Articular Branch ◽  
Radioulnar Joint ◽  
Anterior Interosseous Nerve ◽  
Pronator Quadratus Muscle

This anatomical study of 40 upper limbs from cadavers investigated the branching pattern of the anterior interosseous nerve in its distal part using the operating microscope. An articular branch to the wrist joint and/or the distal radioulnar joint was only found in seven of the 40 specimens and was always a small terminal continuation of the anterior interosseous nerve after the nerve had passed through the pronator quadratus and innervated it. Therefore, we do not recommend division of the anterior interosseous nerve from the dorsal approach through the interosseous membrane before it gives off its muscular branches to the pronator quadratus. This risks damage of the innervation of this muscle of importance for initiation of hand pronation.

In vivo measurement of distal radioulnar translation following distal radius fracture

2021 ◽  
pp. 175319342110166
Author(s):  
Grey E. B. Giddins ◽  
Greg T. Pickering
Keyword(s):  
Distal Radius Fracture ◽  
Distal Radius ◽  
Distal Radioulnar Joint ◽  
Wrist Fracture ◽  
Radius Fracture ◽  
Normal Range ◽  
Radioulnar Joint ◽  
In Vivo Measurement ◽  
Objectively Measured

The incidence of distal radioulnar joint instability following a distal radius fracture is estimated around one in three based upon clinical examination. Using a validated rig, we objectively measured distal radioulnar joint translation in vivo following distal radius fracture. Dorsopalmar translation of the distal radioulnar joint was measured in 50 adults with previous distal radius fractures. Measurements were compared with the uninjured wrist and against a database of previous measurements within healthy and clinically lax populations. Translation at the distal radioulnar joint was greater in injured wrists at 12.2 mm (range 10–15, SD 1.2) than the uninjured wrists at 6.4 (range 4–9, SD 0.8) ( p < 0.001) and was always outside the established normal range. There was no statistically significant link between translation and the severity of the injury. Instability appears almost inevitable following a distal radius (wrist) fracture, albeit subclinical in the vast majority.

scholarly journals The Effect of Dorsal Angulation on Distal Radioulnar Joint Arthrokinematics Measured Using Intercartilage Distance

2018 ◽  
Vol 08 (01) ◽  
pp. 010-017
Author(s):  
Emily Lalone ◽  
Masao Nishiwaki ◽  
Ryan Willing ◽  
James Johnson ◽  
Graham King ◽  
...  
Keyword(s):  
Distal Radius ◽  
Contact Area ◽  
Three Dimensional ◽  
Distal Radioulnar Joint ◽  
Radioulnar Joint ◽  
Motion Data ◽  
Contact Patterns ◽  
Dorsal Angulation ◽  
Triangular Fibrocartilage

Background The effects of dorsal angulation deformity on in vitro distal radioulnar joint (DRUJ) contact patterns are not well understood. Purpose The purpose of this study was to utilize intercartilage distance to examine the effects of forearm rotation angle, distal radius deformity, and triangular fibrocartilage complex (TFCC) sectioning on DRUJ contact area and centroid position. Methods An adjustable implant permitted the creation of simulated intact state and dorsal angulation deformities of 10, 20, and 30 degrees. Three-dimensional cartilage models of the distal radius and ulna were created using computed tomography data. Using optically tracked motion data, the relative position of the cartilage models was rendered and used to measure DRUJ cartilage contact mechanics. Results DRUJ contact area was highest between 10 and 30 degrees of supination. TFCC sectioning caused a significant decrease in contact area with a mean reduction of 11 ± 7 mm2 between the TFCC intact and sectioned conditions across all variables. The position of the contact centroid moved volarly and proximally with supination for all variables. Deformity had a significant effect on the location of the contact centroid along the volar–dorsal plane. Conclusion Contact area in the DRUJ was maximal between 10 and 30 degrees of supination during the conditions tested. There was a significant effect of simulated TFCC rupture on contact area in the DRUJ, with a mean contact reduction of 11 ± 7 mm2 after sectioning. Increasing dorsal angulation caused the contact centroid to move progressively more volar in the sigmoid notch.

Functional significance of the dorsal respiratory group in adult and newborn rats: in vivo and in vitro studies

1990 ◽  
Vol 111 (1-2) ◽  
pp. 133-138 ◽  
Author(s):  
G. Hilaire ◽  
R. Monteau ◽  
P. Gauthier ◽  
P. Rega ◽  
D. Morin
Keyword(s):  
Functional Significance ◽  
In Vitro Studies ◽  
Newborn Rats ◽  
Dorsal Respiratory Group

Three-dimensional in vivo kinematics of the distal radioulnar joint in malunited distal radius fractures

2002 ◽  
Vol 27 (2) ◽  
pp. 233-242 ◽  
Author(s):  
Douglas C. Moore ◽  
Kathleen A. Hogan ◽  
Joseph J. Crisco ◽  
Edward Akelman ◽  
Manuel F. DaSilva ◽  
...  
Keyword(s):  
Distal Radius ◽  
Three Dimensional ◽  
Distal Radioulnar Joint ◽  
Distal Radius Fractures ◽  
Radius Fractures ◽  
Radioulnar Joint ◽  
In Vivo Kinematics

scholarly journals Increased Capacity for Interleukin-2 Synthesis Parallels Disease Progression in Mice Infected withLeishmania major

1998 ◽  
Vol 66 (9) ◽  
pp. 4537-4540 ◽  
Author(s):  
Frederick P. Heinzel ◽  
Ronald M. Rerko ◽  
Andrea M. Hujer ◽  
Richard A. Maier
Keyword(s):  
Lymph Node ◽  
Disease Progression ◽  
Functional Significance ◽  
Interleukin 2 ◽  
Gamma Interferon ◽  
Mrna Levels ◽  
Lymph Node Cells

ABSTRACT Lymph node cells of BALB/c mice with progressive leishmaniasis produced sixfold more interleukin-2 (IL-2) in culture than those of healing C57BL/6 mice. IL-2 synthesis also increased in C57BL/6 mice made susceptible by IL-12 or gamma interferon deficiency. However, IL-2 mRNA levels in vivo did not reflect IL-2 production in vitro. Because IL-2 contributes to the pathogenesis of progressive leishmaniasis, the functional significance of these findings should be further explored.

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