This is a supplemental report to the author's article appeared on Otolaryngology Tokyo in 1986.
The distortion or structural deformity of the nasal cavity in man can be found not only in the nasal septum but also in the lateral wall of the nasal fossa.
The author found that such distortion in the intranasal structure can be found even in advanced anthropoids. The changes become more distinct in primates and even more obvious in man.
Such distortion appear to have occurred along the process of evolutional development of the skull in anthropoids, where the original structure of the nasal cavity had been deranged. (evolutional paradox).
The state of the nasal cavity can be classified into three types accrding to the findings of deformity of the nasal cavity which was created by the interaction between the maxillofacial bone and cranial bone during their evolutional development.
In mammals the interaction of the two bony structures are well balanced, where the nasal cavity maintains proper structure for normal functional performance ; the author termed this stage as three dimensional stage.
By taking into account the time factor, which was required for evolutional development, the resulting deformity of the intranasal structure in anthropoids may be considered as four dimensional stage.
In evolutional process of man, the major changes were in the brain itself rather than the changes in the shape of the skull. The deformity of the nasal cavity in this stage may be called as five demensional stage.
The author discusses the transition and distortion of the intranasal structures from the viewpoint of evolutional development of the craniofacial bony framwork.
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