Figure 1
From: An ultrasound model to calculate the brain blood outflow through collateral vessels: a pilot study
Model of the neck pathway concerning the cerebral venous return. a) Red tubes represent inflow arteries vessels while blue tubes represent outflow venous vessels. The dashed line are used to represents the collateral venous network. b) Representation of the flow in the vessel of right network of the neck. The direction of the arrows indicate the physiological direction of the flow.