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Fig. 1 | Fluids and Barriers of the CNS

Fig. 1

From: Spinal CSF flow in response to forced thoracic and abdominal respiration

Fig. 1

Regions of interest for CSF flow analyses. Top: magnitude images and Middle: magnified sections reveal CSF flow (bright signals, orange arrows ) during forced inspiration in (left to right) the aqueduct as well as at spinal level C3, Th1, Th8 and L3 of one representative subject (#7). Bottom: corresponding magnified velocity maps indicate upward flow during forced inspiration (bright signals, orange ROI), whereas epidural veins at spinal level C3 (white arrows) show concomitant downward flow of venous blood out of the head

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