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Related Concept Videos

Functional Brain Systems: Limbic System01:15

Functional Brain Systems: Limbic System

The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
Role of Amygdala in Memory01:16

Role of Amygdala in Memory

The amygdala is a small, almond-shaped structure responsible for processing and storing memories, particularly those linked to emotions like fear and stress. It plays an essential role in the brain's response to emotionally significant events and often enhances memory formation by triggering stress hormone release. The amygdala is vital for encoding and retrieving memories associated with fear or stress, a process that is adaptive by helping organisms avoid dangerous situations.
One of the...
Diencephalon: Thalamus and Information Relay01:27

Diencephalon: Thalamus and Information Relay

The thalamus, often called “the gateway to the cerebral cortex,” is vital in processing and directing sensory and motor signals throughout the brain. Almost all inputs destined for the cerebral cortex, except for olfactory signals, are relayed through the thalamus. The thalamus is  a sophisticated relay station, channeling information from various brain regions to the cerebral cortex, as well as a filter, prioritizing certain signals over others based on current physiological states or needs.
Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the subthalamic...
Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla01:27

Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla

The sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response.
Collateral Ganglia
Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity.
The greater splanchnic nerve, formed by the...
Sympathetic Division of the ANS01:19

Sympathetic Division of the ANS

The sympathetic division of the autonomic nervous system (ANS) plays a crucial role in preparing the body for stress, physical activity, and increased energy demands. This division activates the "fight-or-flight" response, enabling individuals to respond effectively to challenging situations.
Originating in the thoracic and lumbar spinal cord segments, the preganglionic fibers of the sympathetic division exit the spinal cord through the white ramus communicans. They then enter the sympathetic...

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Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices
11:13

Ex Vivo Optogenetic Dissection of Fear Circuits in Brain Slices

Published on: April 5, 2016

Interneurons in the basolateral amygdala.

Jay Spampanato1, Jai Polepalli, Pankaj Sah

  • 1The Queensland Brain Institute, University of Queensland, QBI Building (79), St Lucia, QLD 4072, Australia. j.spampanato@uq.edu.au

Neuropharmacology
|November 25, 2010
PubMed
Summary
This summary is machine-generated.

This review explores how diverse synaptic connections and NMDA receptor properties in the basolateral amygdala

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Last Updated: Jun 6, 2026

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Combined Optogenetic and Freeze-fracture Replica Immunolabeling to Examine Input-specific Arrangement of Glutamate Receptors in the Mouse Amygdala
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12:45

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Area of Science:

  • Neuroscience
  • Cellular and Molecular Neuroscience

Background:

  • The amygdala, a key brain region for emotion processing, is central to understanding fear and anxiety.
  • The basolateral amygdala (BLA) acts as the primary input station within the amygdaloid complex.
  • Interneurons within the BLA are diverse and crucial for information processing.

Purpose of the Study:

  • To review recent findings on the physiology and plasticity of inputs targeting BLA interneurons.
  • To examine the diversity of glutamatergic synapses and NMDA receptors on these interneurons.
  • To explore the relationship between synaptic diversity and fear learning.

Main Methods:

  • Review of current literature on BLA interneuron physiology and plasticity.
  • Analysis of immunohistochemical and electrophysiological data.
  • Discussion of NMDA receptor subunit composition and synaptic plasticity mechanisms.

Main Results:

  • BLA interneurons exhibit significant heterogeneity based on immunohistochemical and electrophysiological characteristics.
  • Glutamatergic inputs form diverse excitatory synapses with varied NMDA receptor subunit compositions.
  • These synaptic differences demonstrate plasticity and are linked to fear learning processes.

Conclusions:

  • Synaptic and receptor diversity in BLA interneurons plays a critical role in modulating fear processing.
  • Understanding these mechanisms is essential for insights into anxiety disorders.
  • This research highlights the importance of synaptic plasticity in fear learning and memory.