•••quote:•••Originally posted by goldsalts:
• The idea that the basio-occiput never fuses is PURE CRAP, and any skilled skeletal biologist will be more than happy to tell this to you to your face.•••••Cranio 2002 Jan;20(1):34-8 Related Articles, Books, LinkOut
Radiographic evidence of cranial bone mobility.
Oleski SL, Smith GH, Crow WT.
Philadelphia College of Osteopathic Manipulative Medicine, PA 19131, USA.
The purpose of this retrospective chart review was to determine if external manipulation of the cranium alters selected parameters of the cranial vault and base that can be visualized and measured on x-ray. Twelve adult patient charts were randomly selected to include patients who had received cranial vault manipulation treatment with a pre- and post-treatment x-ray taken with the head in a fixed positioning device. The degree of change in angle between various specified cranial landmarks as visualized on x-ray was measured. The mean angle of change measured at the atlas was 2.58 degrees, at the mastoid was 1.66 degrees, at the malar line was 1.25 degrees, at the sphenoid was 2.42 degrees, and at the temporal line was 1.75 degrees. 91.6% of patients exhibited differences in measurement at 3 or more sites. This study concludes that cranial bone mobility can be documented and measured on x-ray.
PMID: 11831342 [PubMed - indexed for MEDLINE]
Proc Finn Dent Soc 1991;87(1):93-8 Related Articles, Books, LinkOut
Cranial base and the growth of the cranial vault: an experimental study on the rabbit.
Kantomaa T, Pirttiniemi P, Tuominen M.
Department of Oral Development and Orthodontics, University of Oulu, Finland.
Artificial premature synostoses of interparietal, temporoparietal and frontoparietal sutures was induced in 5-day-old rabbits in order to investigate the adaptive capacity of the synchondroseal cartilages. Ten control and 15 experimental animals were killed at the ages of 50 and 100 days. The lengths of occipital and sphenoid bones were significantly increased by 50 days but no longer at 100 days. The angle between the occipital and sphenoid bones was decreased and between the presphenoid and sphenoid bones increased by 50 and 100 days. The results indicate that the growth of the cranial base is to some extent adaptive to the growth of the neural tissues early in postnatal life, but as the growth of the cranial base synchondroses continues much longer than that of the brain the independent growth potential is manifest during the later period.
PMID: 2057494 [PubMed - indexed for MEDLINE]
A tissue pressure model for palpatory perception of the cranial rhythmic impulse.
Norton JM.
Department of Physiology, University of New England College of Osteopathic Medicine, Biddeford, ME 04005.
A tissue pressure model was developed to provide a possible physiologic basis for the manifestation of the cranial rhythmic impulse (CRI). The model assumes that the sensation described as the CRI is related to activation of slowly adapting cutaneous mechanoreceptors by tissue pressures of both the examiner and the subject, and that the sources of change in these tissue pressures are the combined respiratory and cardiovascular rhythms of both examiner and subject. The model generates rhythmic impulses with patterns similar to those reported for the CRI. Also, a significant correlation was found between frequencies calculated from the model and published values for CRI obtained by palpation. These comparisons suggest that the CRI may arise in soft tissues and represents a complex interaction of at least four different physiologic rhythms.
PMID: 1748583 [PubMed - indexed for MEDLINE]