A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects
In the management of neck pain disorders, McKenzie recommends performing neck extension exercises from a fully neck retracted position in order to achieve a maximum range of lower cervical extension. However, no study has investigated the impact of pre-positioning the neck prior to the extension exe...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/26278 |
| _version_ | 1848751941184651264 |
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| author | Takasaki, H. Hall, Toby Kaneko, S. Ikemoto, Y. Jull, G. |
| author_facet | Takasaki, H. Hall, Toby Kaneko, S. Ikemoto, Y. Jull, G. |
| author_sort | Takasaki, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In the management of neck pain disorders, McKenzie recommends performing neck extension exercises from a fully neck retracted position in order to achieve a maximum range of lower cervical extension. However, no study has investigated the impact of pre-positioning the neck prior to the extension exercise. This study compared end-range sagittal cervical segmental rotation and translation from three starting positions: the neck in neutral (Ex), retraction (Ret-Ex) and protraction (Pro-Ex). Twenty asymptomatic healthy volunteers were recruited. Lateral radiographs were taken in neutral and at each of the three end-range extension positions and differences in sagittal rotation angles and translation from the neck neutral posture were calculated at each segment. The results indicated that there was a significant difference in the pattern of the sagittal segmental rotation (P < 0.001) but no difference in summed rotations (total extension) between the three conditions (P > 0.05). Pro-Ex generated significantly (P < 0.05) greater extension range at C1-2 and Ret-Ex produced significantly (P < 0.05) greater extension range at C6-7 than alternate conditions. In contrast, there was no significant difference in segmental translation values between the three conditions (P > 0.05). These results indicate initial neck positions can influence cervical segmental extension range at C1-2 and C6-7. |
| first_indexed | 2025-11-14T08:00:43Z |
| format | Journal Article |
| id | curtin-20.500.11937-26278 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:00:43Z |
| publishDate | 2011 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-262782017-09-13T15:26:24Z A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects Takasaki, H. Hall, Toby Kaneko, S. Ikemoto, Y. Jull, G. In the management of neck pain disorders, McKenzie recommends performing neck extension exercises from a fully neck retracted position in order to achieve a maximum range of lower cervical extension. However, no study has investigated the impact of pre-positioning the neck prior to the extension exercise. This study compared end-range sagittal cervical segmental rotation and translation from three starting positions: the neck in neutral (Ex), retraction (Ret-Ex) and protraction (Pro-Ex). Twenty asymptomatic healthy volunteers were recruited. Lateral radiographs were taken in neutral and at each of the three end-range extension positions and differences in sagittal rotation angles and translation from the neck neutral posture were calculated at each segment. The results indicated that there was a significant difference in the pattern of the sagittal segmental rotation (P < 0.001) but no difference in summed rotations (total extension) between the three conditions (P > 0.05). Pro-Ex generated significantly (P < 0.05) greater extension range at C1-2 and Ret-Ex produced significantly (P < 0.05) greater extension range at C6-7 than alternate conditions. In contrast, there was no significant difference in segmental translation values between the three conditions (P > 0.05). These results indicate initial neck positions can influence cervical segmental extension range at C1-2 and C6-7. 2011 Journal Article http://hdl.handle.net/20.500.11937/26278 10.1016/j.math.2010.07.005 fulltext |
| spellingShingle | Takasaki, H. Hall, Toby Kaneko, S. Ikemoto, Y. Jull, G. A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| title | A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| title_full | A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| title_fullStr | A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| title_full_unstemmed | A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| title_short | A radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| title_sort | radiographic analysis of the influence of initial neck posture on cervical segmental movement at end-range extension in asymptomatic subjects |
| url | http://hdl.handle.net/20.500.11937/26278 |