Related Experiment Video
Updated: Jul 3, 2026
05:55
Modeling the Functional Network for Spatial Navigation in the Human Brain
Published on: October 13, 2023
Neural basis of the cognitive map: path integration does not require hippocampus or entorhinal cortex
Yael Shrager1, C Brock Kirwan, Larry R Squire
1Department of Neurosciences, University of California at San Diego, La Jolla, CA 92093, USA.
Summary
The hippocampus and entorhinal cortex are not essential for human path integration, a key aspect of spatial cognition using self-motion cues. Memory demands, however, significantly impaired performance in patients with lesions in these brain areas.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Spatial Navigation
Background:
- The hippocampus and entorhinal cortex are implicated in memory and spatial cognition.
- Path integration, using self-motion cues to track location, is a crucial spatial ability.
- The necessity of the hippocampus and entorhinal cortex for human path integration remains unclear.
Purpose of the Study:
- To investigate the role of the hippocampus and entorhinal cortex in human path integration.
- To determine if these brain regions are essential for maintaining location awareness during self-motion.
Main Methods:
- Patients with hippocampal or entorhinal cortex lesions and controls performed blindfolded walking tasks.
- Participants actively maintained their path and estimated distance/direction from the start.
- A rotation condition verified reliance on self-motion cues.
- Long-term memory demands were manipulated to assess their impact.
Main Results:
- Patients with hippocampal or entorhinal cortex lesions performed path integration as accurately as controls.
- Performance was confirmed to rely on self-motion cues.
- Increased long-term memory demands led to significant impairment in patients.
Conclusions:
- The hippocampus and entorhinal cortex are not essential for basic path integration in humans.
- These regions may play a role when path integration requires significant long-term memory engagement.
- Spatial cognition abilities, like path integration, can be dissociable from memory functions supported by these structures.
More Related Videos
Related Concept Videos
01:19Role of Hippocampus in Memory
The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...
01:15Functional Brain Systems: Limbic System
The limbic system, often called the "emotional brain," is a complex set of structures located deep within the brain. The intricate network of the limbic system supports a wide range of psychological functions, from emotional regulation to memory formation and sensory processing. This functional brain region encompasses specific parts of the diencephalon and the cerebrum, integrating the higher mental functions of the cerebral cortex with the primitive emotional responses of the deep brain...
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.
01:23Somatosensory, 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...
01:25Olfaction
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...
01:05Cerebral Hemispheres
The human brain, a complex organ, is functionally divided into two cerebral hemispheres—left and right. These hemispheres are interconnected by a structure of paramount importance, the corpus callosum. This substantial bundle of neural fibers is not just a bridge between the hemispheres but a crucial element for the brain's comprehensive functioning. It enables efficient communication between the two hemispheres, allowing each side of the brain to control and receive sensory and motor...