Figure 1 | Scientific Reports

Figure 1

From: Dilatation of the bridging cerebral cortical veins in childhood hydrocephalus suggests a malfunction of venous impedance pumping

Figure 1

Pressure changes in the naturally occurring hydrocephalus in dogs. (a) A diagram of the bridging cortical vein (BCV), lateral lacunae (LL), superior sagittal sinus (SSS) and lateral ventricle (LV) with pressures in normal dogs appended from Portnoy et al.5. The pressure differences across vein walls are shown in red with arrows. (b) A diagram of the pressures found in dogs with a naturally occurring form of hydrocephalus from Portnoy et al.5. Note the pressure across the sagittal sinus wall is increased by 1.7 mmHg and the vein is compressed. The pressure across the BCV is increased by 327% and the vein is depicted as dilated. (c) A coronal T2 image of a normal dog with the arrow indicating the superior sagittal sinus. (d) A coronal T2 image of a naturally hydrocephalic dog showing the sagittal sinus to be much smaller than in 1c. (e) A sagittal T2 slice, just off centre, in a normal dog showing a BCV as a black dot at the arrow head. (f) A sagittal slice from the hydrocephalic dog showing significantly dilated BCVs (arrows).

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