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FIG 2. Cervical nerves roots at their extraforaminal part.
A, Position of the sonographic probe to explore cervical nerve roots at their extraforaminal part.
B, Sonogram (90° left rotated) in a 28-year-old female volunteer shows C5 (1), C6 (2), and C7 (3) roots at their extraforaminal part. They appear as oval hypoechoic structures. Note the shadowing of the cervical transverse processes (arrows). S indicates skin.
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