scholarly journals Role of the Juncturae Tendinum in Preventing Radial Subluxation of the Extensor Communis Tendons after Ulnar Sagittal Band Rupture: A Cadaveric Study

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
N. Greville Farrar ◽  
Amrit Kundra
Keyword(s):  
Extensor Tendon ◽  
Cadaveric Study ◽  
Extensor Mechanism ◽  
Finger Flexion ◽  
Juncturae Tendinum

Background. Radial subluxation of the extensor communis tendons at the metacarpophalangeal (MCP) joints is a rarely reportedvinjury. These injuries have proved difficult to reproduce in cadaveric studies and have a low biomechanical likelihood of occurrence due to the ulnar direction of pull of the extensor communis tendons. It has been suggested that the juncturae tendinum may have a stabilising role, preventing radial subluxation after ulnar sagittal band rupture; however this has not been established. Methods. 40 cadaveric digits were dissected to reveal the extensor mechanism around the MCP joints. The ulnar sagittal bands were released and then the juncturae tendinum divided, in stages, before observing for radial subluxation or dislocation during finger flexion. Results. Radial subluxation of the extensor tendon was observed in only one digit after complete ulnar sagisttal band release. When all the fingers were flexed, after the juncturae tendinorum were divided, four additional tendons subluxed radially and a fifth tendon dislocated in this direction. When the digits were then flexed individually, there were eight unstable tendons in total. Conclusions. The juncturae tendinum appear to have a role in stabilising the extensor communis tendons at the MCP joints and preventing radial subluxation after ulnar sagittal band rupture.

Role of Coracoacromial Ligament and Related Structures in Glenohumeral Stability: A Cadaveric Study

2012 ◽  
Vol 21 (04) ◽  
pp. 210-217 ◽  
Author(s):  
Claude T. Moorman ◽  
Russell F. Warren ◽  
Xiang-Hua Deng ◽  
Thomas L. Wickiewicz ◽  
Peter A. Torzilli
Keyword(s):  
Cadaveric Study ◽  
Coracoacromial Ligament

scholarly journals Motor field sensitivity for preoperative localization of motor cortex

2006 ◽  
Vol 105 (4) ◽  
pp. 588-594 ◽  
Author(s):  
Peter T. Lin ◽  
Mitchel S. Berger ◽  
Srikantan S. Nagarajan
Keyword(s):  
Tactile Stimulation ◽  
Dipole Localization ◽  
Source Imaging ◽  
Magnetic Source Imaging ◽  
Motor Mapping ◽  
Field Sensitivity ◽  
Finger Flexion ◽  
Single Dipole ◽  
Movement Evoked Field

Object In this study the role of magnetic source imaging for preoperative motor mapping was evaluated by using a single-dipole localization method to analyze motor field data in 41 patients. Methods Data from affected and unaffected hemispheres were collected in patients performing voluntary finger flexion movements. Somatosensory evoked field (SSEF) data were also obtained using tactile stimulation. Dipole localization using motor field (MF) data was successful in only 49% of patients, whereas localization with movement-evoked field (MEF) data was successful in 66% of patients. When the spatial distribution of MF and MEF dipoles in relation to SSEF dipoles was analyzed, the motor dipoles were not spatially distinct from somatosensory dipoles. Conclusions The findings in this study suggest that single-dipole localization for the analysis of motor data is not sufficiently sensitive and is nonspecific, and thus not clinically useful.

scholarly journals The Role of Needle Fenestration with Platelet-Rich Plasma in Chronic Tennis Elbow with Indication of Partial Extensor Tendon Tear

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Hunter Tracey L ◽  
Sullivan Spencer W ◽  
Coleman Struan H ◽  
Brand Eric ◽  
Kinderknecht James J ◽  
...  
Keyword(s):  
Tennis Elbow ◽  
Platelet Rich Plasma ◽  
Extensor Tendon ◽  
Tendon Tear

ROLE OF PERIPATELLAR RETINACULUM IN TRANSMISSION OF FORCES WITHIN THE EXTENSOR MECHANISM

2006 ◽  
Vol 88 (9) ◽  
pp. 2042-2048
Author(s):  
CHRISTOPHER M. POWERS ◽  
YU-JEN CHEN ◽  
SHAWN FARROKHI ◽  
THAY Q. LEE
Keyword(s):  
Extensor Mechanism

Differential diagnosis between rheumatoid arthritis and psoriatic arthritis: the value of ultrasound findings at metacarpophalangeal joints level

2011 ◽  
Vol 70 (6) ◽  
pp. 1111-1114 ◽  
Author(s):  
Marwin Gutierrez ◽  
Emilio Filippucci ◽  
Fausto Salaffi ◽  
Luca Di Geso ◽  
Walter Grassi
Keyword(s):  
Rheumatoid Arthritis ◽  
Differential Diagnosis ◽  
Psoriatic Arthritis ◽  
Synovial Fluid ◽  
Potential Role ◽  
Power Doppler ◽  
Extensor Tendon ◽  
Synovial Hypertrophy ◽  
Ultrasound Findings

ObjectiveTo investigate the potential of ultrasound (US) in the differential diagnosis between rheumatoid arthritis (RA) and psoriatic arthritis (PsA) at metacarpophalangeal (MCP) joints level.Methods18 RA patients and 20 PsA patients with clinical involvement of MCP joints were included. All US examinations were performed by two rheumatologists investigating: presence of joint cavity widening (JCW), synovial fluid and/or synovial hypertrophy, peritenon extensor tendon inflammation (PTI) and intra-articular or peri-tendinous power Doppler (PD) signal.ResultsA total of 83 MCP joints in 18 RA patients were assessed. In all of these the authors found different degrees of JCW. 15 of 83 (18%) MCP joints showed synovial fluid, whereas 68 of 83 (82%) MCP joints showed synovial hypertrophy. In 72 of 83 (86.7%) MCP joints intra-articular PD was detected. No PTI pattern was found in these patients.In PsA patients, a total of 82 MCP joints in 20 patients were assessed. 54 of 82 (65.8%) MCP joints showed PTI pattern (p = 0.001). In 50 of these 54 (92.5%) MCP joints extra-articular PD signal was detected (p = 0.001). 28 of 82 (34.1%) MCP joints showed different degrees of JCW. 6 of 28 (21.4%) MCP joints presented synovial fluid, whereas 22 of 28 (78.5%) MCP joints showed synovial hypertrophy. In 8 of 82 (9.7%) MCP joints the JCW and PTI patterns were found contemporaneously.ConclusionsPreliminary results demonstrate that PTI pattern is a higher characteristic of PsA, which suggests a potential role of US in the differential diagnosis between RA and PsA at MCP joints level.

Association Between Thr21Met and Ser89Asn Polymorphisms of the Urotensin II Gene and Systemic Sclerosis

2011 ◽  
Vol 39 (1) ◽  
pp. 106-111 ◽  
Author(s):  
YAVUZ PEHLIVAN ◽  
BULENT GOGEBAKAN ◽  
SERDAR OZTUZCU ◽  
METIN OZGEN ◽  
GÖZDE YILDIRIM CETIN ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Gene Polymorphisms ◽  
Turkish Population ◽  
Allele Frequencies ◽  
Lung Involvement ◽  
Urotensin Ii ◽  
Finger Flexion ◽  
Fibrotic Disorder ◽  
Genotype And Allele Frequencies

Objective.Systemic sclerosis (SSc) is an autoimmune chronic fibrotic disorder. Urotensin II (U-II) is predominantly a vasoactive peptide with fibrotic and prothrombotic features. Like endothelin-1 (ET-1), U-II could play an important role in SSc pathogenesis. We evaluated the possible role of the U-II gene polymorphisms (Thr21Met and Ser89Asn) in the genetic susceptibility to SSc in a Turkish population.Methods.A total of 189 patients with SSc and 205 healthy controls were enrolled in our study. We analyzed the genotype and allele frequencies of the U-II (UTS2) gene polymorphisms Thr21Met and Ser89Asn in patients with SSc and in controls.Results.We found that the Thr21Met polymorphism of the UTS2 gene was markedly associated with the risk of developing SSc (p < 0.0001), but there was no relationship between the Ser89Asn polymorphism and SSc (p > 0.05). Two haplotypes (MS and TS) were markedly associated with SSc (p < 0.05). There were significant associations between the genotype and allele frequencies of UTS2 gene Thr21Met polymorphism and cases with diffuse or limited SSc, systemic or lung involvement, finger flexion deformity, pitting scars at the fingertips, positive anticentromere, or positive antitopoisomerase 1 antibody groups.Conclusion.Our study shows the association between Thr21Met, but not Ser89Asn, in the UTS2 gene and SSc. The results strongly suggest that this single-nucleotide polymorphism may be an important risk factor in the development of SSc, and a powerful indicator of severe skin and lung involvement in patients with SSc.

scholarly journals Odontoid process fractures: the role of the ligaments in maintaining stability. A biomechanical, cadaveric study

SICOT-J ◽  
2015 ◽  
Vol 1 ◽  
pp. 11 ◽  
Author(s):  
Oliver Richard Boughton ◽  
Jason Bernard ◽  
Matthew Szarko
Keyword(s):  
Odontoid Process ◽  
Cadaveric Study
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