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Related Concept Videos

Synaptic Signaling01:09

Synaptic Signaling

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
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Synaptic Signaling01:12

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Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
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Storage01:23

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A schema is a mental framework that helps individuals organize and interpret information. Schemata, formed from previous experiences, influence how we process new information: how we encode it, the inferences we make, and how we retrieve it. For instance, a schema for what a typical classroom looks like might include desks, a teacher's desk, a whiteboard, and students in such an environment. This expectation helps us quickly understand and navigate new classrooms without needing to analyze...
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Integration of Synaptic Events01:28

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
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Long-term Potentiation01:35

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
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Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
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Synaptic tagging during memory allocation.

Thomas Rogerson1, Denise J Cai1, Adam Frank1

  • 1Departments of Neurobiology, Psychiatry & Biobehavioral Sciences, and Psychology, Integrative Center for Learning and Memory, Brain Research Institute, University of California, Los Angeles, California 90095-1761, USA.

Nature Reviews. Neuroscience
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Summary
This summary is machine-generated.

Memory storage in the brain is not random. Specific neuronal and synaptic mechanisms, including synaptic tagging and capture, guide where memories are allocated and recalled.

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Area of Science:

  • Neuroscience
  • Cellular Biology
  • Cognitive Science

Background:

  • Memory allocation to specific neurons and synapses is crucial for learning.
  • Existing evidence suggests non-random mechanisms govern memory storage sites.

Purpose of the Study:

  • To propose an integrated view of memory allocation mechanisms in neurocircuits.
  • To connect neuronal allocation, synaptic tagging and capture, spine clustering, and metaplasticity.

Main Methods:

  • Review and synthesis of current evidence on memory allocation mechanisms.
  • Theoretical integration of neuronal excitability, synaptic tagging and capture, spine clustering, and metaplasticity.

Main Results:

  • Neuronal and synaptic allocation for memory storage is a targeted, non-random process.
  • Neuronal allocation, synaptic tagging and capture, spine clustering, and metaplasticity are interconnected aspects of memory allocation.
  • These mechanisms follow specific rules influencing memory storage and retrieval.

Conclusions:

  • An integrated framework explains how memories are precisely allocated within neural circuits.
  • Understanding these allocation rules is key to comprehending memory formation and recall processes.