Die Veränderung der corticalen Gleichspannung bei kompletter und inkompletter Ischämie des Gehirns

✍ Scribed by H. Hirsch; H. Scholl; K. G. Paschke; H. Schmid-Schönbein

• Publisher: Springer
• Year: 1968
• Tongue: English
• Weight: 530 KB
• Volume: 301
• Category: Article
• ISSN: 0031-6768
• DOI: 10.1007/bf00362644

✦ Synopsis

Changes in Cortical d.c. Potential during Complete and Incomplete

Brain Ischemia Summary. In isolated dog head preparations the d.c. potential of the convexity of the brain (gyrns lateralis) with respect to the surface of os frontale was measured in complete and incomplete ischemia of the brain.

During complete ischemia an initial positivity, reaching a maximum of 1.5 to 2 mV after 1.5 to 2.75 min, is followed by a negative shift. The negativity reaches a steady state of 6.5 mV on an average 3 to 8 rain after onset of the isehemia. After termination of a complete isehemia a transitory positivity is followed by a longer lasting negativity.

In incomplete ischemia the d.c. potential turns negative, when the blood pressure has decreased to 80 to 40 mm Hg. It is assumed that the negative shift begins at the critical blood pressure of the brain.