lab answers - review - Trait What is the significance of...

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Trait What is the significance of this trait? Robust Australopithecus Homo erectus Homo sapiens Shape of cranial vault Brain size Shape also relates to muscle attachments and orientation of the temporalis muscles Elongated, squat cranial vault Suggests posterior placed temporalis muscles for grinding Shorter, taller cranial vault Suggest more up/down orientation of temporalis muscles Short, tall cranial vault Suggest more up/down orientation of temporalis muscles Sagittal crest/temporal lines Sagittal crest or temporal lines are the attachment site for the temporalis muscle Pronounced sagittal crest Sagittal crest signifies a large, strong attachment placed high on the head for strong chewing Pronounced temporal lines Temporal lines suggest weaker mastication and less intense muscle reaction on the bone Barely visible temporal lines Suggests even greater reduction in chewing force Cheek shape Attachment of the masseter muscle Greater surface area allows for more muscle fibers to produce a
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This note was uploaded on 01/18/2011 for the course ANTHRBIO 364 taught by Professor Frisancho during the Spring '10 term at University of Michigan.

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lab answers - review - Trait What is the significance of...

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