atlas (redirected from Atlas the book)

atlas /at·las/ (at´las) the first cervical vertebra.

Atlas. (A), (Top) superior aspect; (bottom) transverse aspect. Note the absence of the body and spinous process. (B), Position.

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at·las (tls)

n.

The top or first cervical vertebra of the neck, supporting the skull and articulating with the occipital bone and rotating around the dens of the axis.

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atlas,

n C1, the first cervical vertebra. The skull sits upon this vertebra, which allows the head to tilt forward and backward. The atlas rests on the axis, allowing for rotation. See also axis.

Atlas.

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atlas,

n the first cervical vertebra articulating superiorly with the occipital bone and inferiorly with the axis (second cervical vertebra).

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atlas

the first cervical vertebra, the uppermost segment of the backbone which supports the skull, characterized by the absence of a body and a wide vertebral canal.