Related Experiment Video
Updated: May 11, 2026

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
Published on: September 27, 2024
Compartmentalization of GABAergic inhibition by dendritic spines
Chiayu Q Chiu1, Gyorgy Lur, Thomas M Morse
1Department of Neurobiology, Yale School of Medicine, New Haven, CT 06510, USA.
Abstract:
γ-aminobutyric acid-mediated (GABAergic) inhibition plays a critical role in shaping neuronal activity in the neocortex. Numerous experimental investigations have examined perisomatic inhibitory synapses, which control action potential output from pyramidal neurons. However, most inhibitory synapses in the neocortex are formed onto pyramidal cell dendrites, where theoretical studies suggest they may focally regulate cellular activity. The precision of GABAergic control over dendritic electrical and biochemical signaling is unknown. By using cell type-specific optical stimulation in combination with two-photon calcium (Ca(2+)) imaging, we show that somatostatin-expressing interneurons exert compartmentalized control over postsynaptic Ca(2+) signals within individual dendritic spines. This highly focal inhibitory action is mediated by a subset of GABAergic synapses that directly target spine heads. GABAergic inhibition thus participates in localized control of dendritic electrical and biochemical signaling.
More Related Videos
07:51Inhibitory Synapse Formation in a Co-culture Model Incorporating GABAergic Medium Spiny Neurons and HEK293 Cells Stably Expressing GABAA Receptors
Published on: November 14, 2014
09:44Assessment of Hippocampal Dendritic Complexity in Aged Mice Using the Golgi-Cox Method
Published on: June 22, 2017
Related Concept Videos
Ligand-Gated Ion Channel Receptor: Gating Mechanism
Integration of Synaptic Events
The Role of Ion Channels in Neuronal Computation
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential.
Antiepileptic Drugs: GABAergic Pathway Potentiators
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for their...