Figure 2From: “Neurologist's contribution to the diagnosis of sine materia respiratory insufficiency: case report” Transcranial Colour-Coded Duplex Sonography (TCCS) from the temporal bone window in axial scanning plane with Power-mode. The sampled right middle cerebral artery shows a continuous presence of multiple high-intensity transient signals (HITS), like a "curtain effect", 30 seconds after the release of the straining phase of the Valsalva manouver.Back to article page