Imagery neurons in the human brain

  title={Imagery neurons in the human brain},
  author={G. Kreiman and Christof Koch and Itzhak Fried},
Vivid visual images can be voluntarily generated in our minds in the absence of simultaneous visual input. While trying to count the number of flowers in Van Gogh's Sunflowers, understanding a description or recalling a path, subjects report forming an image in their “mind's eye”. Whether this process is accomplished by the same neuronal mechanisms as visual perception has long been a matter of debate. Evidence from functional imaging, psychophysics, neurological studies and monkey… 
On the Neuronal Activity in the Human Brain during Visual Recognition, Imagery and Binocular Rivalry
The results suggest that neuronal activity in the human medial temporal lobe correlates with perception, shows a strong degree of invariance to changes in the input and could be involved in processing, storing and recalling visual information.
Disentangling visual imagery and perception of real-world objects
Negative BOLD in Sensory Cortices During Verbal Memory: A Component in Generating Internal Representations?
The results suggest that the balance between positive and negative BOLD might be crucial to the authors' understanding of a large variety of intrinsic and extrinsic tasks including high-level cognitive functions, sensory processing and multisensory integration.
Explicit Encoding of Multimodal Percepts by Single Neurons in the Human Brain
Single-neuron correlates of subjective vision in the human medial temporal lobe
  • G. Kreiman, I. Fried, C. Koch
  • Biology, Psychology
    Proceedings of the National Academy of Sciences of the United States of America
  • 2002
The activity of most individual neurons in the medial temporal lobe of naive human subjects directly correlates with the phenomenal visual experience of patients with pharmacologically intractable epilepsy.
Visual imagery.
It is proposed that information about the neural basis of memory systems should be used to further enhance understanding of the neural mechanisms of visual mental imagery.
Contribution of right hemisphere to visual imagery: A visual working memory impairment?
It is hypothesized that a patient, IM, who suffered from an acute ischemic stroke who appeared to demonstrate relatively isolated impairment in visual imagery has a visual working memory deficit that impairs her ability to generate full visual representations of objects given their names, individual feature, or partial representations.
Reading the mind's eye: Decoding category information during mental imagery
Multimodal images in the brain
Mental imagery is like perceiving, but in the absence of an immediate appropriate sensory stimulation. As such, imagery is often identified with specific phenomenology, such as the experience of
The human imagination: the cognitive neuroscience of visual mental imagery
  • J. Pearson
  • Psychology, Biology
    Nature Reviews Neuroscience
  • 2019
Recent insights into the neural mechanisms that underlie visual imagery are discussed, how imagery can be objectively and reliably measured, and how it affects general cognition are discussed.


Neural Systems Shared by Visual Imagery and Visual Perception: A Positron Emission Tomography Study
Fourteen areas were activated in common by both tasks, only 1 of which may not be involved in visual processing (the precentral gyrus) and in addition, 2 were activation in perception but not imagery, and 5 wereactivated in imagery but not perception.
Neuronal correlate of pictorial short-term memory in the primate temporal cortexYasushi Miyashita
A group of shape-selective neurons in an anterior ventral part of the temporal cortex of monkeys that exhibited sustained activity during the delay period of a visual short-term memory task are reported.
Is visual imagery really visual? Overlooked evidence from neuropsychology.
  • M. Farah
  • Psychology, Art
    Psychological review
  • 1988
Previously overlooked neuropsychological evidence on the relation between imagery and perception is reviewed, and its relative immunity to the foregoing alternative explanations is discussed.
Mental Imagery of Faces and Places Activates Corresponding Stimulus-Specific Brain Regions
Evidence that imagery and perception share common processing mechanisms is strengthened, and it is demonstrated that the specific brain regions activated during mental imagery depend on the content of the visual image.
Dissociation between mental imagery and object recognition in a brain-damaged patient
It is concluded that rich internal representations can be activated to support visual imagery even when they cannot support visually mediated perception of objects.
A functional MRI study of mental image generation
Category-specific visual responses of single neurons in the human medial temporal lobe
Recording from 427 single neurons in the human hippocampus, entorhinal cortex and amygdala found a remarkable degree of category-specific firing of individual neurons on a trial-by-trial basis, providing direct support for the role of human medial temporal regions in the representation of different categories of visual stimuli.
Responses of neurons in inferior temporal cortex during memory-guided visual search.
The results support a "biased competition" model of attention, according to which objects in the visual field compete for representation in the cortex, and this competition is biased in favor of the behaviorally relevant object by virtue of "top-down" feedback from structures involved in working memory.