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Area of Science:

  • Cognitive Neuroscience
  • Psychology
  • Autonomic Nervous System Research

Background:

  • Theories of emotion highlight autonomic nervous system feedback in feelings.
  • Growing evidence suggests autonomic feedback shapes cognitive experiences, including memory.
  • The specific role of cardiovascular feedback in memory judgments remains largely unknown.

Purpose of the Study:

  • To investigate if afferent cardiovascular feedback influences recognition memory decisions and experiences.
  • To determine if cardiovascular feedback affects the discrimination of familiar from novel stimuli.
  • To elucidate the functional role of autonomic feedback in memory-related feeling states.

Main Methods:

  • Utilized the natural variation in baroreceptor-mediated cardiovascular feedback linked to the cardiac cycle.
  • Synchronized the presentation of memory probes (faces) with individual heartbeats during retrieval.
  • Employed a remember/know procedure to differentiate familiarity from recollection.

Main Results:

  • Faces presented during cardiac systole (maximal visceral feedback) were more frequently endorsed as "old" compared to those during diastole (minimal feedback).
  • This effect was observed for both targets and lures, irrespective of facial expression (fearful or neutral).
  • The influence of cardiovascular feedback was specific to trials reporting familiarity without contextual recollection.

Conclusions:

  • Afferent cardiovascular feedback significantly shapes recognition memory, particularly familiarity.
  • Baroreceptor-mediated feedback, previously linked to emotion, plays a functional role in memory-related subjective experiences.
  • This study identifies a specific autonomic pathway influencing memory judgments and feeling states.