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Related Concept Videos

Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or playing an...
Implicit Memories01:24

Implicit Memories

Implicit memories, also known as non-declarative memories, are long-term memories that function outside of conscious awareness. These memories influence behavior and skills without explicit knowledge. This type of memory is evident in tasks like playing tennis, snowboarding, and texting. Implicit memory has three subsystems: procedural memory, conditioning, and priming. This type of memory is essential in various activities, from everyday tasks to specialized skills.
One key aspect of implicit...
Role of Neurotransmitters in Memory01:23

Role of Neurotransmitters in Memory

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.
 Glutamate and Synaptic Plasticity
Glutamate, the brain's main excitatory neurotransmitter, is critical for...
Understanding Memory01:19

Understanding Memory

Memory is the retention of information or experiences over time, facilitated through three main processes: encoding, storage, and retrieval. Encoding is the process of inputting information into the memory system. For instance, when listening to a lecture, watching a play, reading a book, or having a conversation, the brain is actively encoding information. This initial stage involves transforming sensory input into a form that can be processed and stored by the brain. Various factors, such as...
Mnemonic Devices01:23

Mnemonic Devices

Mnemonic devices are cognitive tools that facilitate memory retention by linking new information to familiar patterns or organizational strategies. These techniques are beneficial for remembering complex or lengthy sets of information by simplifying and structuring them in easily retrievable ways.
Acronyms
Acronyms are created by using the initial letters of a series of words to form a new word or phrase. This approach condenses complex information into a single, memorable entity. For example,...
Long-term Potentiation01:25

Long-term Potentiation

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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Related Experiment Video

Updated: Jun 19, 2026

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise
06:17

Assessing Human Spatial Navigation in a Virtual Space and its Sensitivity to Exercise

Published on: January 26, 2024

Cycling behavior and memory formation.

Jason R Gerstner1, Lisa C Lyons, Kenneth P Wright

  • 1Department of Genetics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA. jrgerstn@wisc.edu

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|October 16, 2009
PubMed
Summary
This summary is machine-generated.

Circadian rhythms significantly impact memory formation and consolidation across diverse species. This conserved relationship highlights the importance of daily cycles for optimal cognitive function and molecular mechanisms.

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Area of Science:

  • Neuroscience
  • Chronobiology
  • Behavioral Biology

Background:

  • Circadian rhythms influence numerous physiological and behavioral processes.
  • Memory formation and consolidation are notably shaped by internal circadian oscillators.
  • Few studies have investigated the confounding effects of time-of-day on memory mechanisms.

Purpose of the Study:

  • To highlight recent work on the interactive role of circadian rhythms and memory formation.
  • To present findings across various model organisms and behavioral paradigms.
  • To explore conserved molecular mechanisms linking circadian rhythms to memory.

Main Methods:

  • Cross-species behavioral paradigms (e.g., olfactory avoidance, sensitization, active-avoidance, fear conditioning).
  • Investigation of core clock gene 'period' and associated molecular pathways (e.g., vasoactive intestinal peptide, melatonin, cAMP/MAPK cascade).
  • Analysis of human cognitive performance in relation to sleep-wake homeostasis and circadian clock interactions.

Main Results:

  • Circadian influence on memory behavior is conserved across species, including Drosophila, Aplysia, Zebrafish, and rodents.
  • A conserved mechanistic link exists between specific cycling molecules and memory formation.
  • Proper circadian cycling of molecules is necessary for optimal cognitive performance.
  • Human studies show cognitive alterations due to interactions between sleep-wake homeostasis and the circadian clock.

Conclusions:

  • The functional relationship between circadian rhythms and learning/memory is conserved across species.
  • This conservation provides a framework for future molecular analyses of complex behaviors.
  • Understanding circadian influences is crucial for optimizing cognitive performance.