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A, neck with R2 in maximum dorsal flexion. R1 region 1, R2 region 2, R3 region 3, VT cervico dorsal vertebrae; B, vertebra 3 (R1); C, vertebra 6 (R2); D, vertebra 11 (R3). Top line, dorsal view; Midline, right lateral view; Bottom line, cranial view. Scale 1 cm.
