Concurrently, the shift to anaerobic metabolism leads to lactic acid accumulation, causing intracellular acidosis that further damages organelles and compromises cellular integrity. The resulting ionic imbalance leads to a dangerous influx of sodium and calcium ions, while potassium leaks out into the extracellular space.
Glutamate Excitotoxicity in the Ischemic Cascade: How Excess Glutamate Drives Neuronal Damage
However, surrounding the core is a region known as the ischemic penumbra, where cells are hypoxic but still potentially viable. This electrochemical disruption is a key early marker of distress and triggers a cascade of downstream effects, including the pathological opening of glutamate receptors.
The accumulation of glutamate leads to excessive activation of NMDA and AMPA receptors on the postsynaptic neuron. Inflammation, Acidosis, and Oxidative Stress The influx of calcium triggers the production of reactive oxygen species and activates inflammatory pathways.
Glutamate Excitotoxicity in the Ischemic Cascade
Penumbra Not all brain tissue affected by the initial blockage suffers the same fate. The Shift to Anaerobic Metabolism and Ion Dysregulation As aerobic metabolism fails, the cell's ATP-dependent sodium-potassium pumps struggle to maintain the resting membrane potential.
More About Ischemic cascade
Looking at Ischemic cascade from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on Ischemic cascade can make the topic easier to follow by connecting earlier points with a few simple takeaways.
