Principal Components Analysis of the Atlas Vertebra

Meseke, Christopher A.; Duray, Stephen M.; Brillon, Sebastien R.

doi:10.1016/j.jmpt.2008.02.010

Cited by 9 publications

(10 citation statements)

References 10 publications

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“…Differences between the superior articular facets on the different sides were reported by earlier researchers (9,19,21), as were differences in the inferior articular facet (21) and foramen transversarium (19). In addition we have also found a significant difference between the right and left sides in the thickness of the posterior arch at the site of vertebral artery groove and in the distance from the midline to the medial most edge of the vertebral artery groove for the outer and inner cortex.…”

Section: Discussionsupporting

confidence: 85%

A Study on the Morphometric Asymmetry of Atlas Vertebrae

Ansari¹,

Mukesh²,

Kb³

et al. 2016

JSA

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The commonly used examination procedures of the upper cervical spine depend upon the symmetry for comparison and interpretation of joint functions. If symmetry is not normal, then these assessments may mislead the examiners, allowing them implementation of incorrect treatment plans. Objectives of this study are to explore the possibility that asymmetry is more common than symmetry and, if it is true, to find out the effects of asymmetry on the biomechanics of these joints. The study was carried out on 30 atlas vertebrae of cadavers of Indian origin. The different intra-atlas distances were measured on both sides by digital vernier calliper. All the parameters studied showed statistically significant differences between the right and left side i.e. a p value of < 0.05. The anteroposterior diameter of the foramen transversarium, the transverse diameter of the foramen transversarium, the distance from the midline to medial edge of the vertebral artery groove (inner as well as outer cortex) and the length of the superior articular facets were more on the right side as compared to the left side. The breadth as well as the length of the inferior articular facet, the breadth of the superior articular facet and the difference of posterior arch thickness at the site of vertebral artery groove were more on the left side as compared to the right side. These differences may be explained by the handedness of an individual, which influences the intra-osteal asymmetry in a characteristically distinct manner, which needs to be confirmed or refuted in a further study.

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Section: Discussionsupporting

confidence: 85%

A Study on the Morphometric Asymmetry of Atlas Vertebrae

Ansari¹,

Mukesh²,

Kb³

et al. 2016

JSA

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“…Meseke found the mean ± SD of the width of the superior articulating surface to be 9.15 ± 1.28 mm on the left and 9.00 ± 1.29 mm on the right. 16 The width of the inferior articulating surface of the lateral mass was 13.97 ± 1.48 mm on the left and 13.91 ± 1.57 mm on the right. The height of the lateral mass was found to be 19.60 ± 2.24 mm on the left and 19.56 ± 2.09 mm on the right.…”

Section: Discussionmentioning

confidence: 91%

“…Jende and Peterson 14 found that the difference in the palpated lateral prominence of the C1TP did not match first cervical laterality measurements found on radiographs. Ross et al 15 and Meseke et al 16 have questioned the interpretation of palpation findings because of asymmetry of the first cervical vertebrae. They agreed with Blair on the implication of how asymmetry of the spine may affect palpation evaluation for the spinal misalignment.…”

Section: Discussionmentioning

confidence: 99%

“…These biomechanical abnormalities based on anatomical variation may be mistaken for a subluxation." 16 When palpating the atlas to determine a misalignment, the left and right transverse processes are used as references to each other. Meseke et al 16 found the mean ± SD of the atlas transverse process to be 23.06 ± 2.62 mm on the left and 23.17 ± 2.41 mm on the right.…”

Section: Discussionmentioning

confidence: 99%

“…16 When palpating the atlas to determine a misalignment, the left and right transverse processes are used as references to each other. Meseke et al 16 found the mean ± SD of the atlas transverse process to be 23.06 ± 2.62 mm on the left and 23.17 ± 2.41 mm on the right. When doubling the SD, an examiner would have to account for 5-mm difference in palpation findings to account for asymmetry before determining a misalignment.…”

Section: Discussionmentioning

confidence: 99%

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Inter- and intraexaminer reliability of the Blair protractoview method: examination of a chiropractic radiographic technique

Hubbard

Vowles

Forest³

2010

Journal of Chiropractic Medicine

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Objective: The purpose of this study was to evaluate the inter-and intraexaminer reliability of the Blair protractoview radiographic method. Methods: This retrospective study evaluated 25 participants attending a Blair technique seminar. Participants included chiropractic students and doctors of chiropractic with more than 11 years of experience. Participants evaluated 100 Blair protractoview radiographs (oblique nasium). A κ analysis was used to determine the inter-and intraexaminer reliability because of the nominal categorical value of the variables. For the interexaminer reliability, a κ score was given for each examiner combination. The scores were then averaged to give the total interexaminer reliability. Results: The overall interexaminer reliability showed substantial reliability at 0.62. Withingroup κ values were as follows: no certification = 0.61, proficiency = 0.66, primary level = 0.61, and advanced level = 0.74. The overall intraexaminer reliability showed outstanding reliability at 0.81. Within-group κ values were as follows: no certification = 0.76, proficiency = 0.84, primary level = 0.82, and advanced level = 0.92. All κ values had a P value b .001. Conclusion: The participants in this study showed good inter-and intraexaminer reliability using the Blair protractoview radiographic method.

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