The C1/C2 facet joint (FJ) recesses.

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Presentation transcript:

The C1/C2 facet joint (FJ) recesses. The C1/C2 facet joint (FJ) recesses. (A) Transverse view of the space (asterisk) and recesses (arrows) of a left C1/C2 FJ cavity. (B) Sagittal view of the space (asterisk) and recesses (arrows) of the C1/C2 FJ cavity. Arrowheads point to the synovial folds. Note the pl and sn posterior to the FJ cavity. (C) Lateral views of the three-dimensional reconstruction model of the recesses (arrows) and space (asterisk) of a C1/C2 FJ cavity with and without the vertebrae after micro-CT scanning. (D) The intact and opened C1/C2 FJ specimen after a contrast filling injection and micro-CT scanning (C). Arrows point to the FJ recesses and asterisk indicates the FJ space. C1–C2, the first and second cervical vertebrae; ca, carotid artery; pl, vascular plexus; sn, spinal nerve; va, vertebral artery. Bars, 5 mm. Casper G Thorpe Lowis et al. BMJ Open Sport Exerc Med 2018;4:e000338 ©2018 by BMJ Publishing Group Ltd