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Classical conditioning not only includes the initial pairing of stimuli but also extends to more complex forms, such as higher-order conditioning. Higher-order conditioning involves creating associations beyond the primary conditioned stimulus, resulting in a chain of conditioned responses.
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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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Higher-order conditioning and the retrosplenial cortex.

Travis P Todd1, Roman Huszár1, Nicole E DeAngeli1

  • 1Department of Psychological and Brain Sciences, Dartmouth College, Hanover, NH, United States.

Neurobiology of Learning and Memory
|May 22, 2016
PubMed
Summary
This summary is machine-generated.

The retrosplenial cortex (RSC) is not essential for second-order fear conditioning acquisition. While RSC lesions impaired initial fear learning, they did not affect subsequent learning of cue associations.

Keywords:
Conditioned suppressionFearHigher-orderRetrosplenialSecond-order

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • The retrosplenial cortex (RSC) is implicated in spatial and contextual learning and memory.
  • Its strategic location connects visual-spatial areas with the hippocampal memory system.
  • Evidence suggests the RSC also plays a role in learning discrete cues, as seen in sensory preconditioning.

Purpose of the Study:

  • To investigate the RSC's role in second-order conditioning, a higher-order learning paradigm.
  • To determine if RSC function is necessary for acquiring second-order fear associations.

Main Methods:

  • Rats with sham or RSC lesions underwent first-order conditioning (visual stimulus V1 paired with footshock, V2 unpaired).
  • Subsequently, auditory stimuli (A1, A2) were paired with V1 and V2, respectively.

Main Results:

  • RSC lesions significantly impaired performance in the first-order discrimination task.
  • However, RSC lesions did not affect the rats' ability to acquire second-order conditioning.

Conclusions:

  • The retrosplenial cortex is not required for the acquisition or expression of second-order fear conditioning.
  • These findings suggest a potential dissociation between the RSC's role in first-order and second-order conditioning, and possibly with hippocampal function.