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Updated: Jul 25, 2026
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Investigating Long-term Synaptic Plasticity in Interlamellar Hippocampus CA1 by Electrophysiological Field Recording
Published on: August 11, 2019
Melatonin regulates neuronal plasticity in the hippocampus
Y El-Sherif1, J Tesoriero, M V Hogan
1Department of Biology, College of Staten Island/CUNY, Staten Island, New York, USA.
Journal of Neuroscience Research
|April 22, 2003
Summary
Melatonin influences hippocampal neuron activity, affecting responses to different electrical stimulation patterns. This study reveals melatonin
Area of Science:
- Neuroscience
- Neurophysiology
- Pharmacology
Background:
- Melatonin, a neurohormone, is known to influence neuronal excitability.
- Hippocampal evoked potentials are crucial for studying synaptic plasticity and neuronal function.
Purpose of the Study:
- To investigate the effects of melatonin on hippocampal evoked potentials.
- To determine how melatonin modulates neuronal responses to various electrical stimulation frequencies and patterns.
Main Methods:
- Electrophysiological recordings of hippocampal slices.
- Application of low-frequency, high-frequency stimulation (HFS), and paired-pulse stimulation.
- Administration of melatonin dissolved in ethanol.
Main Results:
- Melatonin attenuated low-frequency stimulation responses.
- Melatonin amplified high-frequency stimulation-induced potentiation.
- Melatonin exhibited a biphasic effect on paired-pulse facilitation, initially causing inhibition before returning to facilitation.
- Melatonin reversed paired-pulse inhibition.
Conclusions:
- Melatonin modulates specific forms of synaptic plasticity in hippocampal pyramidal neurons.
- These findings highlight melatonin's potential role in regulating hippocampal network function.
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