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The asterion is the point on the skull corresponding to the posterior end of the parietomastoid suture.
Side view of head, showing surface relations of bones. (Asterion visible at center right.)
or where three cranial bones meet:
In the adult, it lies 4 cm behind and 12 mm above the center of the entrance to the ear canal.
The asterion receives its name from the Greek ἀστέριον (astērion), meaning "star" or "starry".
The Mercedes point is an alternative term for the asterion, for its resemblance to the Mercedes-Benz logo.
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