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Interoceptive awareness and its relationship to hippocampal dependent processes
Leah Dudley1, Richard J Stevenson1
1Department of Psychology, Macquarie University, Sydney, NSW 2109, Australia.
Brain and Cognition
|September 20, 2016
Summary
Hippocampal dependent learning and memory (HDLM) performance is linked to interoceptive awareness in healthy adults. This suggests the hippocampus plays a role in sensing internal body states.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Neuropsychological and lesion studies implicate the hippocampus in interoceptive awareness.
- Neuroimaging studies suggest the insula and anterior cingulate cortex are crucial for interoception.
Purpose of the Study:
- To investigate the association between hippocampal-dependent learning and memory (HDLM) performance and interoceptive awareness in healthy young adults.
- To explore the role of the hippocampus in interoceptive processing.
Main Methods:
- Assessed interoceptive awareness using heart rate tracking, water loading tasks, and the Multidimensional Assessment of Interoceptive Awareness (MAIA) questionnaire.
- Measured HDLM performance using logical memory percent retention.
- Controlled for confounding variables.
Main Results:
- Found significant associations between water loading and MAIA scores (which were correlated) and HDLM performance.
- These findings suggest hippocampal involvement in interoceptive awareness.
Conclusions:
- Hippocampal-dependent processes are involved in interoceptive awareness in healthy young adults.
- Medial temporal lobe structures may mediate interoceptive tasks involving ingestion and/or integration of internal state information.
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