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Related Concept Videos

Association Areas of the Cortex01:21

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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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...
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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Declarative association in the perirhinal cortex.

Yuji Naya1

  • 1Department of Psychology and Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, People's Republic of China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, People's Republic of China; PKU-IDG/McGovern Institute for Brain Research, Peking University, Beijing, People's Republic of China.

Neuroscience Research
|July 16, 2016
PubMed
Summary
This summary is machine-generated.

Declarative memories rely on the medial temporal lobe (MTL). Single-unit studies suggest memory associations are more distributed across MTL areas, with the perirhinal cortex playing a key role alongside the hippocampus.

Keywords:
Conscious recollectionDeclarative associationEpisodic memoryMedial temporal lobePattern separationPerirhinal cortexSemantic memoryTemporal-order memory

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Area of Science:

  • Neuroscience
  • Cognitive Science

Background:

  • Declarative memories, essential for recalling experiences (episodic) and knowledge (semantic), are traditionally linked to the medial temporal lobe (MTL).
  • The MTL, including the perirhinal cortex, parahippocampal cortex, entorhinal cortex, and hippocampus, is thought to support memory through a hierarchical organization.

Purpose of the Study:

  • To review neurophysiological single-unit studies on declarative memory.
  • To investigate the role of the perirhinal cortex and hippocampus in memory association.
  • To propose a more distributed model of memory association within the MTL.

Main Methods:

  • Review of single-unit neurophysiological studies.
  • Focus on neuronal activity in the perirhinal cortex and hippocampus.
  • Analysis of findings related to association processes in declarative memory.

Main Results:

  • Single-unit studies present a more complex view of memory function than the traditional hierarchical model.
  • The perirhinal cortex demonstrates the capacity to represent both within-domain (item-item) and between-domain (item-context) associations.
  • Memory association appears to be more distributed across MTL regions than previously assumed, with the perirhinal cortex complementing the hippocampus.

Conclusions:

  • The conventional hierarchical model of the MTL in declarative memory may be an oversimplification.
  • The perirhinal cortex plays a significant, distributed role in memory association, contributing to both episodic and semantic memory.
  • A revised understanding of declarative memory implicates a broader network within the MTL for association and recollection.