What basic pathophysiology predisposes neurons to seizures?

• A. An imbalance between excitatory and inhibitory neurotransmission leading to neuronal hyperexcitability
• B. Excessive inhibitory neurotransmission
• C. Only genetic mutation in ion channels
• D. Reduced metabolic demand

Answer: (A)

Seizures come from neurons becoming too easily excited and firing in a highly synchronized way. In the brain, excitation and inhibition are normally balanced: excitatory signals (like glutamate) push neurons toward firing, while inhibitory signals (like GABA) hold them back. When this balance tips toward excitation, neurons reach their firing threshold more readily and can enter bursts of activity that spread across networks. This hyperexcitability and hypersynchrony is what creates the electrical storm seen in seizures.

Keep in mind that many things can tilt the balance toward excitation—more excitatory drive, heightened receptor sensitivity, or reduced inhibitory control—often involving ion channels, neurotransmitter systems, or metabolic factors. But the unifying idea is that the predisposition arises from an imbalance favoring excitation over inhibition. Excessive inhibition would suppress seizures, a genetic ion-channel mutation is one possible contributor but not the only mechanism, and reduced metabolic demand would not promote this hyperactive state.