In MTLE-associated hippocampal sclerosis, which region shows principal neuronal loss and gliosis?

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Multiple Choice

In MTLE-associated hippocampal sclerosis, which region shows principal neuronal loss and gliosis?

Explanation:
In MTLE-associated hippocampal sclerosis, CA1 pyramidal neurons bear the brunt of the damage, showing the principal neuronal loss and reactive gliosis. Recurrent seizures drive excitotoxic injury via excessive glutamate release, and CA1 neurons are particularly vulnerable to this insult due to their intrinsic properties and connectivity. While CA3 can be involved and the dentate gyrus may show granule cell loss, the most prominent and defining site of sclerosis is the CA1 region. This vulnerability explains why CA1 is the best answer for where the major neuronal loss and gliosis occur.

In MTLE-associated hippocampal sclerosis, CA1 pyramidal neurons bear the brunt of the damage, showing the principal neuronal loss and reactive gliosis. Recurrent seizures drive excitotoxic injury via excessive glutamate release, and CA1 neurons are particularly vulnerable to this insult due to their intrinsic properties and connectivity. While CA3 can be involved and the dentate gyrus may show granule cell loss, the most prominent and defining site of sclerosis is the CA1 region. This vulnerability explains why CA1 is the best answer for where the major neuronal loss and gliosis occur.

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