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. Author manuscript; available in PMC: 2016 Feb 22.
Published in final edited form as: J Neurosurg. 2009 Nov;111(5):1001–4. doi: 10.3171/2009.2.JNS081256

Fig. 1.

Fig. 1

Images from the animals in the SAH (top row) and sham SAH (bottom row) groups. SAH Group: On Day 7 after SAH, CT cisternography (A) revealed contrast material entering the sylvian fissure and distributed over the surface of the cerebral hemisphere on the side opposite the SAH, but no contrast present in the vicinity of the right MCA. There is significantly less contrast on the surface of the right hemisphere. Evans blue dye injected 3 hours before death (B) stains blue the proximal (M1) portion of the right MCA, the segment close to the ICA, leaving the M2 branches unstained. The convexity of the right hemisphere (C) and the base of the frontal and temporal lobes near the right Sylvian fissure (D) are also less stained than the corresponding areas of the left cerebral hemisphere. The graph (E) depicts the CSF attenuation in the sylvian fissure on the CT cisternographies performed every 30 minutes for 2 hours on postoperative Day 7 after SAH in the same animal. There was a significant difference (p < 0.05) in the CSF attenuation between the right (ipsilateral) and left (contralateral) sides. Sham SAH Group: On Day 7 after sham SAH, CT cisternography (A) revealed contrast material entering the sylvian fissure along the left MCA and distribution of the material over the convexity of the cerebral hemisphere on the side opposite surgery. Contrast is also present in the vicinity of the right MCA in the right sylvian fissure. There is less contrast on the surface of the right cerebral hemisphere. Evans blue dye injected 3 hours before death (B) evenly stained blue the right and left MCAs as well as the rest of the cerebral arteries, although there is an appreciable difference in dye distribution over the convexity of the right and left hemispheres (C) and at the base on the brain (D). The graph (E) depicts the CSF attenuation in the sylvian fissure on the CT cisternographies performed every 30 minutes for 2 hours on postoperative day 7 after sham SAH surgery in the same animal. There was no difference (p > 0.05) in the CSF attenuation between the right (ipsilateral) and left (contralateral) sides but there was diminished contrast in the parietal region on the ipsilateral compared with contralateral side (p < 0.02).