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Preparations and Protocols for Whole Cell Patch Clamp Recording of Xenopus laevis Tectal Neurons
Published on: March 15, 2018
GABAergic circuits control stimulus-instructed receptive field development in the optic tectum
Blake A Richards1, Oliver P Voss, Colin J Akerman
1Department of Pharmacology, Oxford University, Oxford, UK.
Nature Neuroscience
|August 10, 2010
Summary
Developing brain circuits learn from sensory input by modifying receptive fields. This study reveals GABAergic signals are crucial for this learning process in the optic tectum of Xenopus laevis.
Area of Science:
- Neuroscience
- Developmental Biology
- Sensory Systems
Background:
- Receptive field development in sensory systems is shaped by environmental stimuli.
- Learning algorithms sensitive to spike timing correlations are hypothesized to mediate this plasticity.
- The precise mechanisms by which developing circuits utilize sensory-related correlations remain unclear.
Purpose of the Study:
- To investigate the role of GABAergic transmission in the experience-dependent modification of receptive fields in the developing optic tectum.
- To determine if spike timing-dependent plasticity mechanisms are involved in this developmental learning process.
Main Methods:
- Electrophysiological recordings from neurons in the developing optic tectum of Xenopus laevis.
- Presentation of moving visual stimuli to induce receptive field changes.
- Pharmacological manipulation using GABAergic transmission blockers.
Main Results:
- Repeated visual stimuli induced receptive field changes reflecting stimulus properties.
- Blockade of GABAergic transmission disrupted this form of learning.
- GABA blockade altered neural spike timing and increased inter-neuronal correlations, impacting synaptic plasticity.
Conclusions:
- GABAergic signals play a previously unrecognized role in the developmental plasticity of sensory circuits.
- Regulation of spiking activity statistics is critical for learning in developing neural systems.
- This study highlights the importance of inhibitory neurotransmission in shaping sensory processing during development.
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