Spatial representation of words in the brain implied by studies of a unilateral neglect patient

Nature ◽  
1990 ◽  
Vol 346 (6281) ◽  
pp. 267-269 ◽  
Author(s):  
Alfonso Caramazza ◽  
Argye E. Hillis
Keyword(s):  
Spatial Representation ◽  
Unilateral Neglect ◽  
Neglect Patient ◽  
The Brain

Acceleration Perception and Spatial Distortion in a Left Unilateral Neglect Patient

Cortex ◽  
2004 ◽  
Vol 40 (2) ◽  
pp. 315-322 ◽  
Author(s):  
Giuliano Geminiani ◽  
Luca Latini Corazzini ◽  
Natale Stucchi ◽  
Patrizia Gindri
Keyword(s):  
Unilateral Neglect ◽  
Neglect Patient ◽  
Spatial Distortion

scholarly journals Spatial Representation of Feeding and Oviposition Odors in the Brain of a Hawkmoth

Cell Reports ◽  
2018 ◽  
Vol 22 (9) ◽  
pp. 2482-2492 ◽  
Author(s):  
Sonja Bisch-Knaden ◽  
Ajinkya Dahake ◽  
Silke Sachse ◽  
Markus Knaden ◽  
Bill S. Hansson
Keyword(s):  
Spatial Representation ◽  
The Brain

scholarly journals Unilateral neglect syndrome clinical and topographic study of 20 subjects

1990 ◽  
Vol 48 (2) ◽  
pp. 188-194 ◽  
Author(s):  
Luciano Ribeiro Pinto Jr. ◽  
Sylvio Saraiva ◽  
Wilson Luiz Sanvito
Keyword(s):  
Parietal Lobe ◽  
Visual Neglect ◽  
Unilateral Neglect ◽  
Anatomical Region ◽  
Cat Scan ◽  
Neglect Syndrome ◽  
The Right ◽  
The Brain ◽  
Crossing Test ◽  
Line Crossing

Twenty patients with unilateral neglect syndrome were studied. They were 10 males and 10 females, and they ranged from 29 to 76 years of age. All were submitted to a CAT scan of the brain. Based on the findings in our sample we drew the following conclusions: the extinction phenomenon was a constant manifestation of unilateral neglect; the line crossing test proved to be most efficient for the identification of visual neglect; the right parietal lobe was the anatomical region most often involved in the unilateral neglect syndrome.

Double trouble for Gestalt Bubbles

2003 ◽  
Vol 26 (4) ◽  
pp. 417-418
Author(s):  
Dan Lloyd
Keyword(s):  
Spatial Representation ◽  
Three Dimensional ◽  
Spatial Properties ◽  
The Brain

The “Gestalt Bubble” model of Lehar is not supported by the evidence offered. The author invalidly concludes that spatial properties in experience entail an explicit volumetric spatial representation in the brain. The article also exaggerates the extent to which phenomenology reveals a completely three-dimensional scene in perception.

scholarly journals A spatial map in the somatosensory cortex

2018 ◽  
Author(s):  
Xiaoyang Long ◽  
Sheng-Jia Zhang
Keyword(s):  
Somatosensory Cortex ◽  
Spatial Representation ◽  
Hippocampal Formation ◽  
Place Cells ◽  
Border Cells ◽  
Head Direction ◽  
Head Direction Cells ◽  
Sensory Inputs ◽  
Boundary Vector ◽  
The Brain

AbstractSpatially selective firing in the forms of place cells, grid cells, boundary vector/border cells and head direction cells are the basic building blocks of a canonical spatial navigation system centered on the hippocampal-entorhinal complex. While head direction cells can be found throughout the brain, spatial tuning outside the hippocampal formation are often non-specific or conjunctive to other representations such as a reward. Although the precise mechanism of spatially selective activities is not understood, various studies show sensory inputs (particularly vision) heavily modulate spatial representation in the hippocampal-entorhinal circuit. To better understand the contribution from other sensory inputs in shaping spatial representation in the brain, we recorded from the primary somatosensory cortex in foraging rats. To our surprise, we were able to identify the full complement of spatial activity patterns reported in the hippocampal-entorhinal network, namely, place cells, head direction cells, boundary vector/border cells, grid cells and conjunctive cells. These newly identified somatosensory spatial cell types form a spatial map outside the hippocampal formation and support the hypothesis that location information is necessary for body representation in the somatosensory cortex, and may be analogous to spatially tuned representations in the motor cortex relating to the movement of body parts. Our findings are transformative in our understanding of how spatial information is used and utilized in the brain, as well as functional operations of the somatosensory cortex in the context of rehabilitation with brain-machine interfaces.

scholarly journals Instantaneous midbrain control of saccade kinematics

2018 ◽  
Author(s):  
Ivan Smalianchuk ◽  
Uday Jagadisan ◽  
Neeraj J. Gandhi
Keyword(s):  
Spatial Representation ◽  
Primary Motor Cortex ◽  
Visually Guided ◽  
Rate Code ◽  
Serial Process ◽  
Lower Brain Stem ◽  
Eye Velocity ◽  
The Brain ◽  
Correlative Relationship ◽  
Instantaneous Control

AbstractThe ability to interact with our environment requires the brain to transform spatially-represented sensory signals into temporally-encoded motor commands for appropriate control of the relevant effectors. For visually-guided eye movements, or saccades, the superior colliculus (SC) is assumed to be the final stage of spatial representation, and instantaneous control of the movement is achieved through a rate code representation in the lower brain stem. We questioned this dogma and investigated whether SC activity also employs a dynamic rate code, in addition to the spatial representation. Noting that the kinematics of repeated movements exhibits trial-to-trial variability, we regressed instantaneous SC activity with instantaneous eye velocity and found a robust correlation throughout saccade duration. Peak correlation was tightly linked to time of peak velocity, and SC neurons with higher firing rates exhibited stronger correlations. Moreover, the strong correlative relationship was preserved when eye movement profiles were substantially altered by a blink-induced perturbation. These results indicate that the rate code of individual SC neurons can control instantaneous eye velocity, similar to how primary motor cortex controls hand movements, and argue against a serial process for transforming spatially encoded information into a rate code.

scholarly journals A novel somatosensory spatial navigation system outside the hippocampal formation

Cell Research ◽  
2021 ◽  
Author(s):  
Xiaoyang Long ◽  
Sheng-Jia Zhang
Keyword(s):  
Somatosensory Cortex ◽  
Spatial Representation ◽  
Hippocampal Formation ◽  
Spatial Navigation ◽  
Place Cells ◽  
Head Direction ◽  
Head Direction Cells ◽  
Sensory Inputs ◽  
Boundary Vector ◽  
The Brain

AbstractSpatially selective firing of place cells, grid cells, boundary vector/border cells and head direction cells constitutes the basic building blocks of a canonical spatial navigation system centered on the hippocampal-entorhinal complex. While head direction cells can be found throughout the brain, spatial tuning outside the hippocampal formation is often non-specific or conjunctive to other representations such as a reward. Although the precise mechanism of spatially selective firing activity is not understood, various studies show sensory inputs, particularly vision, heavily modulate spatial representation in the hippocampal-entorhinal circuit. To better understand the contribution of other sensory inputs in shaping spatial representation in the brain, we performed recording from the primary somatosensory cortex in foraging rats. To our surprise, we were able to detect the full complement of spatially selective firing patterns similar to that reported in the hippocampal-entorhinal network, namely, place cells, head direction cells, boundary vector/border cells, grid cells and conjunctive cells, in the somatosensory cortex. These newly identified somatosensory spatial cells form a spatial map outside the hippocampal formation and support the hypothesis that location information modulates body representation in the somatosensory cortex. Our findings provide transformative insights into our understanding of how spatial information is processed and integrated in the brain, as well as functional operations of the somatosensory cortex in the context of rehabilitation with brain-machine interfaces.

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