lateral masses

lateral masses, the bulkiest, solid parts of the atlas (C1) vertebra, upon which the skull is supported.
References in periodicals archive ?
2) A combined lateral displacement of the C1 lateral masses > 6.
In the AP view, vertical alignment of the spinous processes, smooth undulating borders created by the lateral masses, and uniformity among the disc spaces are indicative of a normal spine (Fig 2) (Holliman, Mayer, Cook, & Smith, 1991).
This is the site of fracture in traumatic spondylolisthesis, not the pedicles or lateral masses, as is commonly stated.

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