Related Experiment Video
Updated: Mar 16, 2026
07:30
Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
8.0K
Associative hallucinations result from stimulating left ventromedial temporal cortex.
Elissa M Aminoff1, Yuanning Li2, John A Pyles1
1Department of Psychology, Carnegie Mellon University, Pittsburgh, PA, USA; Center for the Neural Basis of Cognition, Pittsburgh, PA, USA.
Summary
This study links the ventromedial temporal cortex (VTC) to visual recognition by showing it processes object context. Electrical brain stimulation of the VTC induced associative visual phenomena, supporting its role in memory and perception.
Area of Science:
- Neuroscience
- Cognitive Science
- Visual Perception
Background:
- Visual recognition integrates perception, context, and knowledge.
- The ventromedial temporal cortex (VTC) is implicated in object recognition, learning, and memory.
- A direct link between VTC function, associative processing, episodic memory, and visual recognition is not well-established.
Purpose of the Study:
- To investigate the role of the ventromedial temporal cortex (VTC) in connecting visual recognition with associative processing and episodic memory.
- To explore the functional significance of medial VTC regions in contextual association.
Main Methods:
- Electrocorticography (ECoG) was used to identify VTC regions sensitive to object context in a human patient.
- Electrical brain stimulation (EBS) was applied to these identified VTC regions.
Main Results:
- Medial VTC regions showed sensitivity to the contextual associations of objects.
- Electrical brain stimulation of these VTC regions elicited memory-related, associative visual phenomena.
- This demonstrates a functional relationship between visual recognition, associative processing, and episodic memory.
Conclusions:
- The ventromedial temporal cortex (VTC) plays a crucial role in integrating visual information with associative processing and episodic memory.
- Abnormalities in these VTC-mediated processes may contribute to the generation of visual hallucinations.
Related Concept Videos
01:21Association Areas of the Cortex
10.3K
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,...
10.3K
01:22CNS Stimulants: Psychedelic Agents
945
Hallucinogens, also known as psychedelic drugs, are a class of substances known for their ability to alter perception, cognition, and emotions. Despite their profound effects on the mind, these drugs are non-addictive, setting them apart from many other abused substances. The mechanism of action of these drugs lies in their impact on the 5-HT2A receptor in the brain. Upon activation, this receptor couples to Gq-type G proteins, triggering a cascade that releases intracellular calcium. This...
945
01:14Motor and Sensory Areas of the Cortex
8.8K
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....
8.8K
01:25Olfaction
49.6K
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...
49.6K
01:27Hallucinogens and Psychedelics
878
Hallucinogens are psychoactive substances that profoundly alter perceptual experiences, generating unreal visual and sensory images. Often referred to as psychedelic drugs — a term derived from the Greek words "psyche" (mind) and "delos" (revealing) — these substances include marijuana and lysergic acid diethylamide (LSD), among others. These drugs vary in intensity and effects.
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains...
Marijuana, derived from the dried leaves and flowers of the hemp plant, contains...
878
01:23Somatosensory, Motor, and Association Cortex
3.6K
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...
3.6K