Related Experiment Video
Updated: Jun 18, 2026
10:44
Single Cell Multiplex Reverse Transcription Polymerase Chain Reaction After Patch-clamp
Published on: June 20, 2018
Self-modulation of neocortical pyramidal neurons by endocannabinoids
Silvia Marinelli1, Simone Pacioni, Astrid Cannich
1European Brain Research Institute, Rome, Italy.
Nature Neuroscience
|November 17, 2009
Summary
Researchers discovered endocannabinoids mediate slow self-inhibition in excitatory pyramidal neurons. This finding suggests glutamatergic networks in the neocortex possess self-regulatory mechanisms, impacting neural circuit function.
Area of Science:
- Neuroscience
- Cellular Biology
- Computational Neuroscience
Background:
- Pyramidal neuron excitability is crucial for neocortical function.
- Inhibitory neurons utilize somatodendritic slow self-inhibition (SSI) for self-regulation.
- Mechanisms for self-regulation in excitatory neurons remain largely unexplored.
Purpose of the Study:
- To investigate the existence and mechanisms of self-regulation in excitatory neurons.
- To determine if pyramidal neurons exhibit somatodendritic slow self-inhibition (SSI).
- To explore the role of endocannabinoids in modulating neuronal activity and connectivity.
Main Methods:
- Electrophysiological recordings in rodent brain slices.
- Patch-clamp techniques to record from layer 2/3 pyramidal neurons.
- Pharmacological manipulation to assess the role of endocannabinoids.
Main Results:
- Layer 2/3 pyramidal neurons exhibit distinct dendritic morphology.
- Endocannabinoids were found to mediate SSI in these excitatory neurons.
- Evidence for long-term modulation of inhibitory connections by endocannabinoids was observed.
Conclusions:
- Glutamatergic networks in the neocortex are capable of self-regulation.
- Endocannabinoid signaling plays a key role in the self-inhibition and modulation of excitatory neurons.
- This self-regulatory mechanism contributes to the dynamic control of cortical circuit activity.
More Related Videos
Related Concept Videos
01:30Regulation of Food Intake
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
01:37Neural Regulation
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.