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The calcar avis, (calcarine spur) previously known as the hippocampus minor, [1] is an involution of the wall of the lateral ventricle's posterior horn produced by the calcarine fissure. [ 2 ] It is sometimes visible on ultrasound [ 3 ] and can resemble a clot .
The facet joints are formed by the superior and inferior processes of each vertebra. The first cervical vertebra has an inferior articulating surface but, as it does not restrict lateral or posterior translation, is not always considered a proper zygoma [9] (zygoma is Greek for "yoke", i.e. something that restrains movement).
The number of vertebrae in a region can vary but overall the number remains the same. In a human spinal column, there are normally 33 vertebrae. [3] The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone.
Degenerative disc disease; Other names: Degenerative disc disorder, intervertebral disc degeneration: Degenerated disc between C5 and C6 (vertebra at the top of the picture is C2), with osteophytes anteriorly (to the left) on the lower portion of the C5 and upper portion of the C6 vertebral body. Specialty: Orthopedics: Risk factors: Connective ...
C2 – At least one cm lateral to the occipital protuberance at the base of the skull. Alternately, a point at least 3 cm (1.2 in) behind the ear. C3 – In the supraclavicular fossa, at the midclavicular line. C4 – Over the acromioclavicular joint. C5 – On the lateral (radial) side of the antecubital fossa, just proximally to the elbow.
Bilateral C2 pars fractures are known as a variant of the hangman's fracture. On an anterior oblique radiograph of the lumbar spine , the pars is the neck of the imaginary Scottie dog; the Scottie dog's eye is the pedicle, [ 3 ] its hindlegs the spinous process, its nose the transverse process, its ear the superior articular facet and its ...
In some, the x-ray findings may correspond to symptoms of back stiffness with flexion/extension or with mild back pain. [2] Back pain or stiffness may be worse in the morning. [ 4 ] Rarely, large anterior cervical spine osteophytes may affect the esophagus or the larynx and cause pain , difficulty swallowing [ 5 ] [ 6 ] or even dyspnea . [ 7 ]
The C2 fracture accounts for nearly 19% of spinal fractures [10] and 55% of cervical fractures (in patients with head injury). Within C2 fractures, the hangman's fracture accounts for 23% of occurrences while the odontoid or dens fracture accounts for 55% of them. [2]
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