scholarly journals Lumbar Annular High-Intensity Zone as a Precursor to Disc Extrusion

Cureus ◽  
2021 ◽  
Author(s):  
Deion L Ellis ◽  
Reza Ehsanian ◽  
Peter C Shin ◽  
William E Rivers
Keyword(s):  
High Intensity ◽  
High Intensity Zone ◽  
Disc Extrusion

scholarly journals Effect of Posterior Dynamic Instrumentation on High-Intensity Zone in Lumbar Degenerative Disc Disease

2016 ◽  
Vol 6 (1_suppl) ◽  
pp. s-0036-1582832-s-0036-1582832
Author(s):  
Suat Canbay ◽  
Yaprak Ataker ◽  
Nazan Canbolat ◽  
Zeynep Unal Kabaoglu ◽  
Tunc Oktenoglu ◽  
...  
Keyword(s):  
Degenerative Disc Disease ◽  
High Intensity ◽  
Disc Disease ◽  
Lumbar Degenerative Disc Disease ◽  
Degenerative Disc ◽  
Dynamic Instrumentation ◽  
High Intensity Zone

scholarly journals Clinical Significance of High-intensity Zone for Discogenic Low Back Pain: A Review

2016 ◽  
Vol 63 (1.2) ◽  
pp. 1-7 ◽  
Author(s):  
Subash C. Jha ◽  
Kosaku Higashino ◽  
Toshinori Sakai ◽  
Yoichiro Takata ◽  
Mitsunobu Abe ◽  
...  
Keyword(s):  
Low Back Pain ◽  
Back Pain ◽  
Clinical Significance ◽  
High Intensity ◽  
Low Back ◽  
High Intensity Zone ◽  
Discogenic Low Back Pain

Lumbar Disc High-intensity Zone

Spine ◽  
1996 ◽  
Vol 21 (1) ◽  
pp. 79-86 ◽  
Author(s):  
Kurt P. Schellhas ◽  
Steven R. Pollei ◽  
Cooper R. Gundry ◽  
Kenneth B. Heithoff
Keyword(s):  
High Intensity ◽  
Lumbar Disc ◽  
High Intensity Zone

The Stiffness of Lumbar Spinal Motion Segments With a High-Intensity Zone in the Anulus Fibrosus

Spine ◽  
1998 ◽  
Vol 23 (20) ◽  
pp. 2167-2173 ◽  
Author(s):  
Timothy A. Schmidt ◽  
Howard S. An ◽  
Tae-Hong Lim ◽  
Bruce H. Nowicki ◽  
Victor M. Haughton
Keyword(s):  
High Intensity ◽  
Anulus Fibrosus ◽  
Spinal Motion ◽  
High Intensity Zone ◽  
Lumbar Spinal

scholarly journals Accuracy of MRI for Diagnosis of Discogenic Pain

2008 ◽  
Vol 3;11 (5;3) ◽  
pp. 311-326
Author(s):  
Conor O’Neill
Keyword(s):  
Bone Marrow ◽  
Test Performance ◽  
High Intensity ◽  
Diagnostic Performance ◽  
The Other ◽  
Intensity Change ◽  
Discogenic Pain ◽  
High Intensity Zone ◽  
Mri Characteristics ◽  
Nuclear Signal

Background: Previous studies have compared MRI parameters to the results from discography. However, none have evaluated the overall diagnostic performance of MRI, taking into account that many MRI characteristics may be correlated. Objective: Determine the accuracy of MRI for diagnosis of discogenic pain, taking into consideration the interdependence of MRI parameters. Study Design: An observational report. Setting: Sample of 143 patients, 92 male and 51 female in a spinal pain speciality center. Discography classification and scorings for MRI parameters were collected as outcome measures. Methods: MRI and discography data were collected from patients with chronic low back pain. Five MRI characteristics were defined: high intensity zone, nuclear signal, disc height, disc contour, and bone marrow intensity change. On discography, each disc was classified as either positive or negative. The accuracy of MRI was evaluated using receiver operating characteristic curves. Results: MRI parameters are correlated with each other and with discography findings, and these correlations affect the accuracy of MRI. Overall, nuclear signal alone is as accurate as any of the other MRI parameters, or combination of parameters, in the diagnosis of discogenic pain. While there is no difference in overall accuracy between nuclear signal and the other MRI parameters, these parameters do influence test performance when there is a moderate loss of nuclear signal . Moderate loss of nuclear signal and disc bulge has the best combination of sensitivity (79.8%) and specificity (79.3%). Adding moderate loss of disc height improves specificity (82.0%) slightly, and decreases sensitivity (73.6%) slightly, while incorporating high intensity zone grade II further improves specificity (92.6%) and decreases sensitivity (54.7%). High intensity zone grade I and bone marrow intensity change have minimal influence, even when there is moderate loss of nuclear signal. Conclusions: MRI parameters are correlated with each other and with discography findings, influencing the diagnostic performance of MRI. Combining MRI parameters improves the diagnostic performance of MRI, but only in the presence of moderate loss of nuclear signal. When there is either normal nuclear signal or severe loss of nuclear signal the other MRI parameters have no influence on test performance. The practical implication for physicians that use discography is that the most important single MRI parameter to consider is nuclear signal. If nuclear signal is normal the disc is very likely to be negative on discography, while if there is severe loss of nuclear signal it is very likely to be positive. Discography will be most useful in discs with moderate loss of nuclear signal, particularly if there are no other MRI abnormalities present. Key words: Discography, MRI, ROC curve, chronic back pain, neural signal, disc contour, high intensity zone

scholarly journals Analysis and comparison of intensity in specific soccer training sessions

2015 ◽  
Vol 21 (1) ◽  
pp. 54-60 ◽  
Author(s):  
Luciano Antonacci Condessa ◽  
Christian Emmanuel Torres Cabido ◽  
André Maia Lima ◽  
Daniel Barbosa Coelho ◽  
Vinicius M. Rodrigues ◽  
...  
Keyword(s):  
Heart Rate ◽  
Exercise Intensity ◽  
High Intensity ◽  
Soccer Players ◽  
Moderate Intensity ◽  
Maximal Heart Rate ◽  
Professional Soccer ◽  
High Intensity Zone ◽  
Soccer Training ◽  
And Training

This study compared the exercise intensity of four specific soccer training sessions (friendly and training match, tactical and technical workouts). Ten professional soccer players (24.2 ± 3.7 years, 177.9 ± 7.3 cm, 63.2 ± 4.6 mLO2•kg-1•min-l) were recruited. A treadmill progressive interval test was performed to determine the players' VO2max, maximal heart rate (HRmax), HR-VO2 curve, and the heart rate corresponding to blood lactate concentrations of 2 and 4 mmol/L. The heart rate during the training sessions was used to estimate the exercise intensity and to classify them into intensity zones (low-intensity: <2 mmol/L; moderate-intensity: between 2 and 4 mmol/L; high-intensity: >4 mmol/L). Exercise intensities were different among training sessions (friendly match: 86.0 ± 5.1% HRmax; training match: 81.2 ± 4.1% HRmax; tactical workout: 70.4 ± 5.3% HRmax; technical workout: 62.1 ± 3.6% HRmax). The friendly match presented the highest percentage of time performed in the high-intensity zone.

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