Nasal Silling Guttering Skull

Trait result european asian african.

Nasal silling guttering skull. Features of the skull used in race determination. Feel the base of the nasal cavity on either side of the nasal spine do you feel sharp ridges nasal silling rounded ridges or no ridges at all nasal guttering. Measure the widest part of the nasal cavity and divide by the length from the top of the nasal bone to bottom of nasal spine nasal spine located at the base of the nasal cavity on the top part of the maxilla nasal silling or guttering on the base of the nasal cavity on either side of the nasal spine. There will be sharp ridges nasal silling rounded ridges or no ridges nasal guttering prognathism extended jaw caucasian nasal index longer and more narrow negroid nasal index shorter and wider mongoloid nasal index moderate.

Nasal width mm nasal height mm. There will be sharp ridges nasal silling rounded ridges or no ridges. Skull definitions nasal index the ratio w l opening nasal spine located at the base of the nasal cavity nasal silling or guttering on the base of the nasal cavity. Nasal index 48 48 53 53 nasal spine prominent spine somewhat prominent spine very small spine nasal silling guttering sharp ridge silling rounded ridge no ridge guttering prognathism straight variable prognathic shape of orbital openings rounded.

Variable nasal spines caucasian asian african caucasian usually prominent spine. Nasal index the ratio of the width to the height of the nose multiplied by 100. Extended lower jaw shape of eye orbits round or squareish nasal spine nasal silling and guttering from. For example imagine from a skull and pelvis you determined the individual was an adult caucasian the height would be determine by.

Nasal silling guttering no ridge guttering prognathism prognathic shape of orbital openings rectangular or square. Nasal silling and guttering. Prognathism extended lower jaw. Determining ancestry from skeletal remains is a difficult task and it is becoming more and more complicated as interracial mixing becomes more common.