The correct answer is a) anterior and posterior nuchal lines. These are bony ridges located on the occipital bone at the back of the skull. The anterior nuchal line serves as an attachment point for muscles that support the head and neck, while the posterior nuchal line is the site for the attachment of muscles that help in extending the neck. The muscles that anchor to these lines play a crucial role in stabilizing and moving the head, making these anatomical features essential for maintaining posture and allowing for various head movements.
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