<P> Wormian bones , also known as intra sutural bones , are extra bone pieces that occur within a suture ( joint ) in the cranium . These are irregular isolated bones that appear in addition to the usual centers of ossification of the cranium and , although unusual , are not rare . They occur most frequently in the course of the lambdoid suture , which is more tortuous than other sutures . They are also occasionally seen within the sagittal and coronal sutures . A large wormian bone at lambda is often called an Inca bone ( Os Incae ) , due to the relatively high frequency of occurrence in Peruvian mummies . Another specific wormian bone , the pterion ossicle , sometimes exists between the sphenoidal angle of the parietal bone and the great wing of the sphenoid bone . They tend to vary in size and can be found on either side of the skull . Usually , not more than several are found in a single individual , but more than one hundred have been found in the skull of a hydrocephalic adult . </P>
<P> Wormian bones , also known as intra sutural bones , are extra bone pieces that occur within a suture ( joint ) in the cranium . These are irregular isolated bones that appear in addition to the usual centers of ossification of the cranium and , although unusual , are not rare . They occur most frequently in the course of the lambdoid suture , which is more tortuous than other sutures . They are also occasionally seen within the sagittal and coronal sutures . A large wormian bone at lambda is often called an Inca bone ( Os Incae ) , due to the relatively high frequency of occurrence in Peruvian mummies . Another specific wormian bone , the pterion ossicle , sometimes exists between the sphenoidal angle of the parietal bone and the great wing of the sphenoid bone . They tend to vary in size and can be found on either side of the skull . Usually , not more than several are found in a single individual , but more than one hundred have been found in the skull of a hydrocephalic adult . </P>
what is an example of a sutural bone
what is an example of a sutural bone
Inca bone
Inca bone