False memories and confabulation

Area of Science:

• Cognitive Neuroscience
• Psychology

Background:

• Memory distortions, ranging from minor errors to significant confabulations, arise from issues in source monitoring processes.
• True and false memories are underpinned by the brain's ability to distinguish memory origins.

Purpose of the Study:

• To review theoretical frameworks and empirical data on source monitoring in memory formation.
• To explore the neural mechanisms associated with true and false memory evaluation.

Main Methods:

• Review of neuropsychological studies on patients with brain lesions affecting memory.
• Analysis of neuroimaging studies linking brain activity to memory processes.
• Examination of factors influencing heuristic and systematic memory judgments.

Main Results:

• Specific brain lesions (frontal and medial-temporal) can cause profound source confusions (confabulations).
• The right prefrontal cortex (PFC) may handle heuristic memory judgments, while the left PFC (or both) handles systematic judgments.
• Hypnosis, social demands, and motivation can disrupt these processes, potentially inducing false memories.

Conclusions:

• Source monitoring deficits, linked to specific brain functions, underlie memory distortions.
• Caution is advised for professions that elicit memories to prevent the creation of false memories.