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Related Concept Videos

Dissociative Amnesia01:21

Dissociative Amnesia

148
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...
148
Dissociative Disorders01:27

Dissociative Disorders

152
Dissociative disorders represent complex psychological conditions characterized by disruptions in consciousness, memory, identity, or perception. These disruptions cause individuals to experience a disconnection from their thoughts, emotions, and memories. The phenomenon is not merely an occasional lapse in attention but a profound alteration in mental functioning that can severely impact daily life.
Dissociative Fugue
A hallmark feature of dissociative disorders is the dissociative fugue...
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Dissociative Identity Disorder01:30

Dissociative Identity Disorder

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Dissociative Identity Disorder (DID), previously termed multiple personality disorder, is a complex psychological condition characterized by the presence of two or more distinct identities or personality states. Each identity exhibits unique patterns of behavior, voice, and mannerisms and may possess separate memories and emotional responses. The alternating control between identities can result in memory gaps and challenges in recalling daily activities, often exacerbating the individual's...
160
Amnesia01:13

Amnesia

160
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...
160
Interference and Decay01:16

Interference and Decay

176
Forgetting is a complex cognitive phenomenon influenced by several factors, among which interference and decay are particularly prominent. These processes explain why individuals often struggle to retrieve specific information from memory, leading to lapses in recall that can be observed in everyday situations.
Interference occurs when competing memories hinder the retrieval of particular information. It can be classified into two types: proactive and retroactive interference. Proactive...
176
Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

894
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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Use of a Psychophysiological Script-driven Imagery Experiment to Study Trauma-related Dissociation in Borderline Personality Disorder
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Did Dissociative Amnesia Evolve?

Lawrence Patihis1

  • 1Department of Psychology, University of Portsmouth.

Topics in Cognitive Science
|June 21, 2023
PubMed
Summary
This summary is machine-generated.

Dissociative amnesia, a psychogenic memory loss, is unlikely to have evolved as an adaptive mechanism. This study examines the evolutionary plausibility of blocking trauma memories.

Keywords:
AdaptationDissociative amnesiaEvolutionGene frequenciesMemoryTrauma

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Area of Science:

  • Cognitive Psychology
  • Evolutionary Psychology
  • Neuroscience

Background:

  • Dissociative amnesia is a diagnostic category involving psychogenic memory loss, often linked to trauma.
  • Its definition shares similarities with repressed memory concepts.
  • The category is considered disputed within psychological and diagnostic communities.

Purpose of the Study:

  • To evaluate the evolutionary plausibility of dissociative amnesia as an evolved cognitive mechanism.
  • To explore the potential adaptive benefits or drawbacks of blocking traumatic memories.
  • To assess the likelihood of dissociative amnesia evolving through natural selection.

Main Methods:

  • Review of general conditions for cognitive function evolution.
  • Analysis of adaptive gene mutation spread.
  • Examination of hypothetical scenarios involving trauma and memory blocking.
  • Discussion of selective pressures favoring or disfavoring memory suppression.

Main Results:

  • The study concludes that the evolution of dissociative amnesia is unlikely.
  • Conditions for cognitive evolution, such as continuous adaptive pressure, do not strongly support this mechanism.
  • Hypothetical scenarios suggest limited adaptive benefits for blocking trauma memories.

Conclusions:

  • Dissociative amnesia is unlikely to be an evolved trait.
  • Further research and scenario development are encouraged to explore this cognitive phenomenon.
  • The evolutionary perspective challenges the adaptive basis of psychogenic memory loss.