Nasal Silling Guttering Skull

Nasal silling and guttering.

Nasal silling guttering skull.

Nasal silling guttering no ridge guttering prognathism prognathic shape of orbital openings rectangular or square. Racial determination using skull notes on page 101 definitions nasal index the ratio of the nasal cavity. 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 width mm nasal height mm.

Features of the skull used in race determination. Nasal index the ratio of the width to the height of the nose multiplied by 100. Trait result european asian african. Variable nasal spines caucasian asian african caucasian usually prominent 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. For example imagine from a skull and pelvis you determined the individual was an adult caucasian the height would be determine by. Prognathism extended lower jaw. There will be sharp ridges nasal silling rounded ridges or no ridges.

Determining ancestry from skeletal remains is a difficult task and it is becoming more and more complicated as interracial mixing becomes more common. Therefore anthropologists examine numerous characteristics and analyze both the visual features and mathematical measurements of a skull before forming their conclusions. Nasal spine 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. 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.