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Excitation/Inhibition Interactions and Seizures: the Brain’s Lifelong Balancing Act

  • Robert F. Ackermann
  • Solomon L. Moshé
Reference work entry

We crave excitement;

Momma said too much is bad;

She favors GABA.

Haiku 1

Excitation and Inhibition

The vertebrate central nervous system evolved in conjunction with sense organs and muscles to detect and localize food, and to coordinate the muscle contractions that allow individuals to pursue, apprehend, and consume it (Gans and Northcutt 1983; Grillner et al. 1998). Acetylcholine conveys the excitatory signal at neuromuscular synapses, while glutamate conveys the excitatory signal at most synapses of mature brains. However, “excitation” as a property resides not in the signaling substances themselves, but in the responses of postsynaptic cells to these substances. Responses to the same chemical signals (“neurotransmitters”) can vary significantly from one brain locale to another, and in the same locale under changing physiological conditions.

Ion concentration differences across the cell membrane are supported by continual, energy-requiring, “bailing” performed by several...

Keywords

GABAA Receptor Transmembrane Potential GABAergic Neuron Postsynaptic Neuron Excitatory Neuron 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of Abbreviations

GABA

Gamma-amino butyric acid

Notes

Acknowledgment

Supported by NINDS grants NS020253, NS048856, NS058303, a grant from PACE, and the Heffer Family Medical Foundation. SLM is the recipient of the Martin A. and Emily L. Fisher fellowship in Neurology and Pediatrics.

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Copyright information

© Springer-Verlag London Limited 2010

Authors and Affiliations

  • Robert F. Ackermann
    • 1
  • Solomon L. Moshé
    • 2
  1. 1.Department of Psychiatry and Behavioral NeurobiologyUAB School of MedicineBirminghamUSA
  2. 2.Department of Neurology, Neuroscience & PediatricsAlbert Einstein College of MedicineBronxUSA

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