scholarly journals Auditory cortical field coding long-lasting tonal offsets in mice

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Hironori Baba ◽  
Hiroaki Tsukano ◽  
Ryuichi Hishida ◽  
Kuniyuki Takahashi ◽  
Arata Horii ◽  
...  
Keyword(s):  
Cortical Field

Canine visual acuity: retinal and cortical field potentials evoked by pattern stimulation

1983 ◽  
Vol 245 (5) ◽  
pp. R637-R641 ◽  
Author(s):  
J. V. Odom ◽  
N. M. Bromberg ◽  
W. W. Dawson
Keyword(s):  
Neuromuscular Block ◽  
Pattern Detection ◽  
Field Potentials ◽  
Retinal Processing ◽  
Pattern Stimulation ◽  
Last Stage ◽  
The Mean ◽  
The Difference ◽  
Mean Luminance ◽  
Cortical Field

The visual acuities (i.e., visual thresholds for pattern detection) of four dogs under neuromuscular block were measured using visually evoked cortical potentials (VECP) and/or pattern-evoked retinal potentials (PERR). Stimuli were phase-reversing square-wave gratings with a mean luminance of 86 cd/m2 and 70% contrast. The mean of the VECP thresholds of two dogs tested was 12.59 cycles per degree (cycles/deg). The mean of the PERR thresholds of four dogs tested was 11.61 cycles/deg. The difference between VECP and PERR thresholds was not statistically significant. VECP acuities appear to be determined at or before the last stage of retinal processing (PERR). Our estimates of canine acuity are 1.3–2 times those reported for cats and 0.2–0.4 times those reported for primates when tested under comparable luminance and contrast conditions.

scholarly journals Comparison of touch- and laser heat-evoked cortical field potentials in conscious rats

1999 ◽  
Vol 824 (2) ◽  
pp. 183-196 ◽  
Author(s):  
Fu-Zen Shaw ◽  
Ruei-Feng Chen ◽  
Hen-Wai Tsao ◽  
Chen-Tung Yen
Keyword(s):  
Field Potentials ◽  
Conscious Rats ◽  
Laser Heat ◽  
Cortical Field

scholarly journals Reciprocal connectivity between secondary auditory cortical field and amygdala in mice

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hiroaki Tsukano ◽  
Xubin Hou ◽  
Masao Horie ◽  
Hiroki Kitaura ◽  
Nana Nishio ◽  
...  
Keyword(s):  
Auditory Cortex ◽  
Primary Auditory Cortex ◽  
The Other ◽  
Axon Terminals ◽  
Reciprocal Connections ◽  
Cholera Toxin Subunit B ◽  
Auditory Field ◽  
Subunit B ◽  
Cortical Field ◽  
Feedback Pathway

AbstractRecent studies have examined the feedback pathway from the amygdala to the auditory cortex in conjunction with the feedforward pathway from the auditory cortex to the amygdala. However, these connections have not been fully characterized. Here, to visualize the comprehensive connectivity between the auditory cortex and amygdala, we injected cholera toxin subunit b (CTB), a bidirectional tracer, into multiple subfields in the mouse auditory cortex after identifying the location of these subfields using flavoprotein fluorescence imaging. After injecting CTB into the secondary auditory field (A2), we found densely innervated CTB-positive axon terminals that were mainly located in the lateral amygdala (La), and slight innervations in other divisions such as the basal amygdala. Moreover, we found a large number of retrogradely-stained CTB-positive neurons in La after injecting CTB into A2. When injecting CTB into the primary auditory cortex (A1), a small number of CTB-positive neurons and axons were visualized in the amygdala. Finally, we found a near complete absence of connections between the other auditory cortical fields and the amygdala. These data suggest that reciprocal connections between A2 and La are main conduits for communication between the auditory cortex and amygdala in mice.

Reorganization of Receptive Fields of Cortical Field 21a Neurons and Formation of Responses to Moving Visual Stimuli

2012 ◽  
Vol 44 (1) ◽  
pp. 33-41 ◽  
Author(s):  
D. K. Khachvankyan ◽  
Yu. A. Kozak ◽  
A. L. Kazaryan ◽  
A. B. Sharanbekyan ◽  
Z. A. Vagramyan ◽  
...  
Keyword(s):  
Visual Stimuli ◽  
Receptive Fields ◽  
Cortical Field

Monkey vocalization and cortical field potential

2002 ◽  
Vol 1232 ◽  
pp. 29-33 ◽  
Author(s):  
H. Gemba ◽  
S. Kyuhou ◽  
R. Matsuzaki ◽  
Y. Amino
Keyword(s):  
Field Potential ◽  
Cortical Field Potential ◽  
Cortical Field

scholarly journals Beyond localization: from hodology to function

2005 ◽  
Vol 360 (1456) ◽  
pp. 767-779 ◽  
Author(s):  
Dominic H ffytche ◽  
Marco Catani
Keyword(s):  
White Matter ◽  
Human Visual System ◽  
Diffusion Tensor ◽  
Occipital Lobe ◽  
Integrative Approach ◽  
Cerebral Function ◽  
Cortical Areas ◽  
Future Developments ◽  
Relevant Today ◽  
Cortical Field

A century on, Campbell's largely forgotten 1905 monograph on the localization of cerebral function has a distinctly contemporary feel. Although his map of cortical fields has been eclipsed by Brodmann's later contribution, Campbell's project went beyond cytoarchitectonic cartography, attempting to integrate clinical, anatomical and physiological evidence to provide a guide to function. A key component of Campbell's integrative, functional anatomical approach was hodology—the pattern of white matter connections between cortical areas—foreshadowing a recently developed functional anatomical technique: diffusion tensor tractography. Here, we revisit Campbell's model of the human visual system using tractography to illustrate prominent white matter connections within the occipital lobe and from occipital to frontal, parietal and temporal regions. Campbell used his integrative approach to support the view that vision consisted of a ‘visuo-sensory’ and a ‘visuo-psychic’ stage, combining hodological, cytoarchitectonic, physiological and clinicopathological evidence to locate the former within the calcarine cortex and the latter within the cortical field surrounding it. Speaking directly to contemporary debates surrounding the neurobiology of conscious vision and providing a framework with which to shape future developments in tractography, Campbell's integrative functional anatomical approach is as relevant today as it was 100 years ago.

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