モダリティー固有の恐怖の逆行性記憶喪失

J J Kim¹, M S Fanselow

¹Department of Psychology, University of California, Los Angeles 90024.

Science (New York, N.Y.)

|May 1, 1992

まとめ

ヒポカンプスは,文脈に関連した恐怖を記憶するのに不可欠ですが,学習後に限られた時間だけです. トーンのような特定のシグナルに対する恐怖は,海馬から独立して記憶されます.

科学分野:

神経科学は神経科学である.
行動心理学行動心理学
記憶の研究記憶の研究

背景:

恐怖は,古典的条件付けによって急速に獲得されます.
恐怖記憶のニューラル基盤を理解することは極めて重要です.

研究の目的:

獲得恐怖記憶の神経基板における海馬の役割を調査する.
背景的および暗示された恐怖記憶におけるヒポカンプスの時間依存的役割を決定する.

主な方法:

ネズミは古典的な方法で,足のショックを使って恐怖のトーンと文脈を条件付けられました.
訓練後の異なる時間点 (1,7,14,28日) で海馬に病変が生じた.
文脈とトーンに対する恐怖反応は,病変の後に評価されました.

主要な成果:

トレーニングの1日後に海馬の病変は,文脈的な恐怖記憶を廃止しました.
背景的な恐怖記憶は,病変が後で (7,14,28日) 形成されたラットで持続しました.
病変は,音声に関連した恐怖記憶に,いかなる時点においても影響を与えない.

結論:

海馬は,文脈的な恐怖記憶の統合において,時間的に制限された役割を果たします.
恐怖記憶は単一のプロセスではなく,文脈的およびシグナル恐怖記憶は,異なる神経機構に依存しています.
これは,ヒポカンプスがコンテキストに関連した最初の恐怖記憶形成に不可欠であるが,長期的な記憶やキュー固有の恐怖記憶には欠かせないことを示唆している.

さらに関連する動画

07:06

Pentylenetetrazole-Induced Kindling Mouse Model

Published on: June 12, 2018

09:00

Investigating Pain-Related Avoidance Behavior using a Robotic Arm-Reaching Paradigm

Published on: October 3, 2020

関連する概念動画

01:15

REM Sleep Behavior Disorder

REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...

01:16

Repressed Memory

Repressed memories are a psychological phenomenon where memories of traumatic events are unconsciously blocked from a person's awareness. This process occurs as a defense mechanism, protecting the mind from the emotional impact of distressing or painful experiences. For example, a person who has experienced childhood trauma may grow up with no conscious recollection of the event. In such cases, the memories are thought to be buried deep within the subconscious, inaccessible to the conscious...

01:18

False Memories

False memories represent a cognitive distortion in which individuals recall events that did not happen, or remember them in an altered form. This phenomenon highlights the brain's constructive nature in processing and recalling memories, emphasizing that memory is not a perfect representation of past events but rather a dynamic reconstruction influenced by various factors.
One primary source of false memories is misattribution, where individuals incorrectly associate external information with...

01:13

Amnesia

Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...

01:26

Modeling in Therapy

Modeling, a key technique in therapy, uses observational learning to help clients acquire and practice new skills by watching therapists demonstrate desired behaviors. This approach, rooted in Albert Bandura's concept of vicarious learning, plays a significant role in therapeutic interventions for various psychological conditions, including social anxiety, ADHD, and depression.
Participant Modeling
Participant modeling involves therapists demonstrating calm and effective behaviors in situations...

01:21

Dissociative Amnesia

Dissociative amnesia is a complex psychological condition that manifests as an inability to recall personal information, often tied to traumatic or stressful events. Unlike general amnesia, individuals with this condition retain the ability to perform routine activities and procedural tasks, such as operating a phone or navigating public transportation, yet experience profound gaps in autobiographical memory. These lapses may encompass significant life events, such as suicide attempts or...

関連する実験動画