atlas

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Related to atlas vertebrae: axis vertebra

atlas

 [at´las]
the first cervical vertebra, the uppermost segment of the vertebral column, which supports the skull.
 Atlas. (A), (top) superior aspect; (bottom) transverse aspect. Note the absence of the body and spinous process. (B), position. From Dorland's, 2000.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

at·las

(at'las), [TA]
First cervical vertebra, articulating with the occipital bone and rotating around the dens of the axis.
[G. Atlas, in Greek mythology, a Titan who supported the heavens on his shoulders]
Farlex Partner Medical Dictionary © Farlex 2012

atlas

(ăt′ləs)
n. pl. at·lases
Anatomy The top or first cervical vertebra of the neck, which supports the skull.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

ATLAS

Cardiology
(1) Assessment of Treatment with Lisinopril and Survival. A trial comparing the effects of high to low doses of Zestril®/lisinopril on morbidity and mortality (M&M) in patients with CHF.
 
Logistics
Randomised, double-blind, parallel-group; 3164 patients.
 
Conclusion
Combined risk of mortality and hospitalisation was 12% lower in the high-dose group.
 
(2) Acolysis during Treatment of Lesions Affecting Saphenous Vein Bypass Grafts. A trial evaluating the use of percutaneous CUT for managing thrombosed coronary SVGs.
 
Primary endpoint
Composite (minimum) lumen diameter <30%, TIMI-3 flow, 30-day freedom from MACE; was achieved in 54% of CUT patients vs 73% of abciximab patients.
 
Logistics
Randomised, controlled, multicentre; 191 patients (92 CUT, 89 abciximab followed by PCI).
 
Conclusion
CUT should not be used during PCI of thrombosed SVGs.

Oncology
Adjuvant Tamoxifen Longer Against Shorter. A trial that asked the optimal duration of adjuvant tamoxifen (a SERM) therapy in women with early breast CA.
 
Logistics
Randomised, international; 13752 enrolled.
 
Sports medicine
Athletes’ Training and Learning to Avoid Anabolic Steroids. A multi-component school-based program for male high school athletes (age 13 to 19), which capitalises on team-centred dynamics and uses positive peer pressure and role modelling to reduce the use of anabolic steroids, alcohol and other drugs.
 
Intervention
A highly scripted 10-session curriculum.
 
Results
New substance use and anabolic steroid use decreased by 50%; drinking and driving decreased by 25%; decreased use of drugs, alcohol and performance-enhancing agents; increased exercise and nutrition.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

ATLAS

Cardiology A five-yr, randomized, double-blind trial–Assessment of Treatment with Lisinopril & Survival–which evaluated the effect of high vs low doses of Zestril®/lisinopril on M&M in Pts with CHF; high doses appear to be effective. See Lisinopril Sports medicine A 5-yr controlled trial–Athletes' Training and Learning to Avoid Anabolic Steroids begun in 1993 and funded by the National Institute of Drug Abuse. See Anabolic steroids.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

at·las

(at'lăs) [TA]
First cervical vertebra, articulating with the occipital bone and rotating around the dens of the axis.
Synonym(s): vertebra C1.
[G. Atlas, in Greek mythology, a Titan who supported the heavens on his shoulders]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

atlas

See ATLAS BONE.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

atlas

the first vertebra of TETRAPODS, linking skull and axis.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

at·las

(at'lăs) [TA]
First cervical vertebra, articulating with the occipital bone and rotating around the dens of the axis.
[G. Atlas, in Greek mythology, a Titan who supported the heavens on his shoulders]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
This research showed that the most common are atlas vertebrae that, according to Mitchell's classification, belong to the class I (78.05%) and the least common are class III atlas vertebrae (7.32%).
A morphological study of ponticuli of the human atlas vertebrae and its clinical significance.
Study of arcuate foramen in atlas vertebrae in Gujarat region.
Posterolateral tunnels and ponticuli in human atlas vertebrae. J Anat.
DISCUSSION: The morphology of the atlas vertebrae seems to be affected by the following factors: head posture, age, congenital anomalies and the skeletal growth pattern.
The atlas vertebrae were evaluated for four linear measurements.
Because the notochord determines the development not only of the body of the atlas vertebra, but also of the basilar part of the occipital bone, which is the posterior part of the cranial base angle, it is possible that the cranial base angle is associated with deviations in the atlas vertebrae. Since the cranial base is connected to the atlas vertebral column by the notochord in early embryogenesis, and the jaws are attached to the cranial base, the cranial base could be the developing link between the atlas vertebrae and the jaws.
that may influence the musculature which may cause alterations in the biomechanical loading of the atlas vertebrae thus affecting their growth and development
c) Atlas vertebrae with complete posterolateral ponticuli--1 (Figure 6)
Atlas vertebrae with incomplete & complete ponticuli--2
noted dehiscence of the inferior part of the middle of posterolateral ponticulus in 4 out of 350 atlas vertebrae, an extension of this gap rostrally could cause separation of lateral and posterior ponticuli.
Posterolateral tunnels and ponticuli in human atlas vertebrae. Journal of anatomy 2001; 199: 339-343.