ischemic neuronal change
Acute morphological alterations in neurons following hypoxic-ischemic injury, characterized by cell shrinkage and hypereosinophilia.
Full Definition
Ischemic neuronal change, also known as acute neuronal necrosis, represents the morphological response of neurons to severe hypoxic-ischemic injury. Affected neurons exhibit characteristic features including cell body shrinkage, loss of Nissl substance, nuclear pyknosis, and intense cytoplasmic eosinophilia. These changes typically develop within hours of the ischemic insult and are most prominent in vulnerable neuronal populations such as hippocampal pyramidal cells and Purkinje cells. Recognition of ischemic neuronal change is crucial for determining the timing and extent of hypoxic-ischemic brain injury in forensic and clinical contexts.
Usage
Usage note: Important for timing ischemic events; distinguish from processing artifacts.
In Context
- "Widespread ischemic neuronal change was observed in the CA1 sector, consistent with global hypoxic injury." — Postmortem examination
- "The pyramidal neurons showed classic features of ischemic neuronal change with triangulated cell bodies and pyknotic nuclei." — Microscopic findings