Figure 5From: Cross-sectional area variations of internal jugular veins during supine head rotation in multiple sclerosis patients with chronic cerebrospinal venous insufficiency: a prospective diagnostic controlled study with duplex ultrasound investigation IJV with wall miopragia (hourglass appearance). Narrowing of the middle segment (J2 - 1.6 mm) with larger values at each end (12.5 and 5.4 mm at J1 and J3 points, respectively).Back to article page