The influence of sitting position on (ventro-) dorsal head translation
Item
- Title
- The influence of sitting position on (ventro-) dorsal head translation
- Author(s)
- Hoffmann Friedrich
- Abstract
-
Acceleration/deceleration injury of the cervical spine goes ahead with translatoric head movements in the first phase of the trauma. Different tilts in sitting position may influence the amount of head translation movement and therefore the vulnerability of cervicooccipital structures. In the present experiment the degree of “passive” head translation was investigated in upright and in 15 ° tilted chair position.
The pure translatoric head movement was achieved by a helmet fixed on a pole. Co-movement of the thoracic spine was suppressed by pressing a plate against the spinous process of C7. The so measured degree of translatoric mobility was compared with the cervical spine motility in yaw and pitch, with a forearm-elbow-test and with the fingertip-to-ground-test.
The different chair position (upright, 15° tilted backwards) did not have a systematic influence on the translatoric head movement. Possibly this can be explained by the fact that a chair tilted backwards only 15° does not change the position of the cervical spine to a great extent.
Comparing the translatoric head movement with the motility of the cervical spine and the forearm-flexion-test it could be shown that in subjects with hypermotility the degree of translatoric head movement decreased. One can suppose that the test movement is not only a passive one but that it activates an inhibitory mechanism which decreases the amount of translatoric head movement especially in subjects with hypermotility.
A further finding was that during repeated head movements the amount of translatoric head movement decreased continuously. This fact can be interpreted as an increasing inhibition, too.
Keywords: Human – ventro-dorsal head translation – hypermotility - whiplash injury - presented at
- Wiener Schule für Osteopathie
- Date Accepted
- 0
- Date Submitted
- 1.1.2007 00:00:00
- Type
- osteo_thesis
- Language
- English
- Submitted by:
- 62
- Pub-Identifier
- 12323
- Inst-Identifier
- 781
- Keywords
- Hypermotility,Head Movements,Whiplash injury
- Recommended
- 0
- Medium
- Hoffmann1.pdf
- Item sets
- Thesis
- Media
- Hoffmann1.pdf
Hoffmann Friedrich, “The influence of sitting position on (ventro-) dorsal head translation”, Osteopathic Research Web, accessed April 25, 2024, https://www.osteopathic-research.com/s/orw/item/3059