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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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Role of Neurotransmitters in Memory01:23

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Neurotransmitters are integral to the brain's communication system, enabling neurons to transmit signals across synapses. This chemical exchange underpins various cognitive functions, including memory processes. The role of neurotransmitters in memory is multifaceted, influencing the encoding, consolidation, and retrieval of memories through their action on different neural circuits.
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Long-term Depression01:05

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Long-term Depression01:03

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Chemical Synapses01:26

Chemical Synapses

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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
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Investigation of Synaptic Tagging/Capture and Cross-capture using Acute Hippocampal Slices from Rodents
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Endocannabinoid signaling and memory dynamics: A synaptic perspective.

Ana Drumond1, Natália Madeira1, Rosalina Fonseca1

  • 1Cellular and Systems Neurobiology, Instituto Gulbenkian de Ciência, Portugal.

Neurobiology of Learning and Memory
|August 3, 2016
PubMed
Summary
This summary is machine-generated.

Memory evolves from labile to consolidated states. Reactivation destabilizes memories, allowing updating or extinction, with the endocannabinoid system modulating this dynamic process.

Keywords:
EndocannabinoidsExtinctionMemory consolidationReconsolidationSynaptic cooperation

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Molecular Biology

Background:

  • Memory acquisition and maintenance are fundamental brain functions.
  • Memories transition from labile states post-learning to consolidated, resistant forms.
  • Reactivation of consolidated memories reintroduces instability, enabling updates or extinction.

Purpose of the Study:

  • To re-examine the relationship between memory consolidation, reconsolidation, and extinction.
  • To provide a unifying view of memory dynamics.
  • To explore the role of the endocannabinoid system in memory maintenance.

Main Methods:

  • Review of existing literature on memory dynamics.
  • Examination of cellular models of synaptic plasticity.
  • Analysis of the endocannabinoid system's function in amygdala synapses.

Main Results:

  • Synaptic plasticity maintenance follows common principles across cellular models.
  • The endocannabinoid system modulates memory dynamics based on stimulus intensity.
  • Endocannabinoid signaling restricts associative plasticity in amygdala synapses, influencing learning outcomes.

Conclusions:

  • Memory dynamics involve complex interplay between consolidation, reconsolidation, and extinction.
  • The endocannabinoid system plays a crucial role in regulating these memory processes.
  • Understanding memory maintenance mechanisms is vital for addressing neuropsychiatric disorders.