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. Author manuscript; available in PMC: 2013 Nov 7.
Published in final edited form as: Med Image Anal. 2007 Mar 1;11(2):10.1016/j.media.2006.11.002. doi: 10.1016/j.media.2006.11.002

Fig. 1.

Fig. 1

BC set for a supine patient with neutral head orientation in the OR. Displacement BCs: Surface 1 is stress-free at atmospheric pressure. Surfaces 2 and 5 are permitted to move along the cranial wall but not along the normal direction. Surfaces 3 and 4 are fixed for displacements. Interstitial pressure. BCs: Surfaces 1, 2 and 3 lie above the assumed level of intraoperative CSF drainage and therefore reside at atmospheric pressure. Surfaces 4 and 5 lie below the assumed level of intraoperative CSF drainage and therefore allow no fluid drainage.