Related Experiment Video
Updated: Jul 31, 2026
09:45
Preparation of Parasagittal Slices for the Investigation of Dorsal-ventral Organization of the Rodent Medial Entorhinal Cortex
Published on: March 28, 2012
Contributions of postrhinal and perirhinal cortex to contextual information processing
D J Bucci1, R G Phillips, R D Burwell
1Department of Psychology, Brown University, Providence, Rhode Island 02906, USA.
Behavioral Neuroscience
|November 21, 2000
Summary
The postrhinal cortex (POR) and perirhinal cortex (PER) are crucial for contextual fear learning. Lesions to these brain areas impair the ability to associate fear with a specific environment.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Behavioral Neuroscience
Background:
- The postrhinal cortex (POR) and perirhinal cortex (PER) are implicated in memory and sensory processing.
- Understanding their specific roles in contextual information processing is essential.
Purpose of the Study:
- To investigate the necessity of the POR and PER in processing relational or contextual information using Pavlovian fear conditioning.
- To determine if these cortical regions are required for learning contextual fear associations.
Main Methods:
- Rats underwent electrolytic or neurotoxic lesions of the POR or PER.
- Subjects were tested in contextual fear conditioning paradigms, including conditioning to a conditioned stimulus and unsignaled shock paradigms.
- Both anterograde and retrograde effects of lesions were assessed.
Main Results:
- Electrolytic lesions of the POR or PER impaired contextual fear conditioning but not fear conditioning to an auditory stimulus.
- Neurotoxic lesions resulted in both anterograde and retrograde deficits in contextual fear conditioning.
- These findings highlight the specific role of POR and PER in context-based learning.
Conclusions:
- The postrhinal cortex and perirhinal cortex are critical for processing sensory information necessary for contextual learning.
- These brain regions play a vital role in forming and retrieving memories associated with specific environments.
More Related Videos
09:00Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
Published on: April 15, 2015
08:52Novel Object Recognition Test for the Investigation of Learning and Memory in Mice
Published on: August 30, 2017
Related Concept Videos
01:25Olfaction
The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
The olfactory receptors are embedded in the cilia of the...
The olfactory receptors are embedded in the cilia of the...
01:14Motor and Sensory Areas of the Cortex
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.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
01:21Association Areas of the Cortex
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
01:22Lobes of the Cerebrum
The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.
01:23Somatosensory, Motor, and Association Cortex
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 the...
01:14Role of Cerebellum and Prefrontal Cortex in Memory
The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the cerebellum's...