Nova Publishers
My Account Nova Publishers Shopping Cart
HomeBooksSeriesJournalsReference CollectionseBooksInformationSalesImprintsFor Authors
            
  Top » Catalog » Books » Biology » Neurosciences » Horizons in Neuroscience Research. Volume 13 Chapters » My Account  |  Cart Contents  |  Checkout   
Quick Find
  
Use keywords to find the product you are looking for.
Advanced Search
What's New? more
Fluvial Geomorphology and Riparian Vegetation: Environmental Importance, Functions and Effects on Climate Change
$82.00
Shopping Cart more
0 items
Information
Shipping & Returns
Privacy Notice
Conditions of Use
Contact Us
Notifications more
NotificationsNotify me of updates to Nervous Excitability Dynamics in a Multisensory Syndrome and its Similitude with Normals: Scaling Laws (pp. 161-190)
Tell A Friend
 
Tell someone you know about this product.
Nervous Excitability Dynamics in a Multisensory Syndrome and its Similitude with Normals: Scaling Laws (pp. 161-190) $0.00
Authors:  (Isabel Gonzalo-Fonrodona, Miguel A. Porras, Departamento de Optica, Facultad de Ciencias Fısicas, Universidad Complutense de Madrid, Ciudad Universitaria, Madrid, Spain, and others)
Abstract:
In the context of increased number of works published on multisensory and crossmodal
effects related to human cerebral processing and brain plasticity, we review
the phenomenology and interpretation of a cortical syndrome that is associated with a
unilateral parieto-occipital lesion in a rather unspecific (or multisensory) zone of the
cortex. This syndrome is closely related to recent findings. The patients with this
syndrome suffered from bilateral and symmetric multisensory disorders with dynamic
effects dependent on the extent of nervous mass lost and the intensity of the stimulus.
They also presented cross-modal effects. The physiological interpretation of this
syndrome has led to a rather unitary conception of brain dynamics. It can help us
to understand perception laws on a physiological basis and can open new avenues of
research. A key point is the similitude of this syndrome with normals, in the sense
that this syndrome would be the result of a scale reduction in the cerebral excitability
(assumption based on neurophysiological data). This will permit us to understand
the desynchronization between different sensory qualities due to their successive loss
according to a well-defined physiological order that is determined by their different excitability
demands. The first qualities lost when the nervous excitation diminishes are
themost complex ones. This process seems to followthe allometric laws of dynamical
systems that have been subjected to a scale reduction.
The striking disorder of inverted perception (visual, tactile, or auditive) in this
syndrome is compared to other cases of visual inversion reported in the bibliography.
Special attention is also paid to the noticeable capability of improving perception by
intensification of the stimulus or by means of another type of stimulus (cross-modal),
muscular effort being one of the most efficient and less known means. This capability
was found to be greater as the nervous excitability deficit (lesion) was greater and as
the primary stimulus was weaker. Thus, in a normal subject, this capability is much
weaker (or negligible), though still perceptible for functions with high excitability demand,
as shown in recent research. We also review the proposed scheme of functional
cortical gradients where the specificity of the cortex is distributed with a continuous
variation, in relation to other proposals and recent findings. The model would account
for multisensory or cross-modal interactions.
Experimental data of perception (including cross-modal effects) in central syndrome
cases are fitted using Stevens’ power law. This law is in relation to allometric
scaling power laws dependent on the active neural mass, that seem to govern many
biological neural networks. 


Available Options:
Version:

  Open Access item.
  Click below PDF icon for free download.

  

This is an Open Access item. Click above PDF icon for free download.
Special Focus Titles
01.Biomarker Discovery and Biotherapeutics Applications of Photosynthetic Light-Harvesting and Bioluminescence Light-Emitting Chromophore-Protein Complexes in Stem Cell Biology and Regenerative Medicine.
02.Collective Memory: How Collective Representations about the Past are Created, Preserved and Reproduced
03.The Limits of Civilization
04.Mexico in Focus: Political, Environmental and Social Issues
05.Sustainable North African Society: Exploring Seeds and Resources for Innovation
06.Environment and Public Health: Environmental Health, Law and International Perspectives
07.Stevia rebaudiana: Chemical Composition, Uses and Health Promoting Aspects
08.Pediatric Renal Transplantation: Protocols and Controversies
09.Mediastinal Infections: Clinical Diagnosis, Surgical and Alternative Treatments
10.Beyond Diet and Depression, Volume 1: Basic Knowledge, Clinical Symptoms and Treatment of Depression
11.Successful Conservation Strategies for Sea Turtles: Achievements and Challenges
12.Effects and Expectations of Tilapia as a Resource
13.Hygienically Relevant Biofilms

Nova Science Publishers
© Copyright 2004 - 2015

Nervous Excitability Dynamics in a Multisensory Syndrome and its Similitude with Normals: Scaling Laws (pp. 161-190)