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Wyszukujesz frazę "visual cortex" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Transcranial direct current stimulation as a new method for changing the accommodative response of the eye
Autorzy:
Wendel, M.
Burdziński, G.
Michalak, K. P.
Przekoracka-Krawczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/173903.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
transcranial direct current stimulation
tDCS
accommodative response
visual training
visual cortex
Opis:
The aim of the present study was to test if the exposure to transcranial direct current stimulation (tDCS) would change the excitability of the visual cortex and influence an accommodative response of the ocular lens. Twenty four subjects were divided into two groups: real-stimulation of the occipital cortex in which participants were exposed to real stimulation (1 mA for 12 min), and sham in which subjects were tested with placebo stimulation. The results showed that tDCS might indeed influence accommodative response. The strongest and most evident effect was observed when a 3.0 D accommodative stimulus was used: anodal tDCS increased but cathodal tDCS – decreased the accommodative response. The second finding was that the effect of stimulation was dependent on the examined eye. The right eye with slightly lower visual acuity and weaker accommodative response in pre-test, responded more strongly than the left eye. The short-time tDCS might modulate excitability of the neurons in visual cortex and eye sensitivity, reflected in the change of accommodative response. The tDCS method may be considered a technique that could reinforce conventional active visual training to improve accommodative functions.
Źródło:
Optica Applicata; 2017, 47, 4; 499-510
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An integrative approach to analyze EEG signals and human brain dynamics in different cognitive states
Autorzy:
Davis, J. J.
Lin, C. -T.
Gillett, G.
Kozma, R.
Powiązania:
https://bibliotekanauki.pl/articles/1396729.pdf
Data publikacji:
2017
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
cognition
EEG
analytic amplitude
analytic phase
Hilbert transform
visual cortex
consciousness
meditation
emotions
awareness
intentionality
spiritual values
Opis:
Electroencephalograph (EEG) data provide insight into the interconnections and relationships between various cognitive states and their corresponding brain dynamics, by demonstrating dynamic connections between brain regions at different frequency bands. While sensory input tends to stimulate neural activity in different frequency bands, peaceful states of being and self-induced meditation tend to produce activity in the mid-range (Alpha). These studies were conducted with the aim of: (a) testing different equipment in order to assess two (2) different EEG technologies together with their benefits and limitations and (b) having an initial impression of different brain states associated with different experimental modalities and tasks, by analyzing the spatial and temporal power spectrum and applying our movie making methodology to engage in qualitative exploration via the art of encephalography. This study complements our previous study of measuring multichannel EEG brain dynamics using MINDO48 equipment associated with three experimental modalities measured both in the laboratory and the natural environment. Together with Hilbert analysis, we conjecture, the results will provide us with the tools to engage in more complex brain dynamics and mental states, such as Meditation, Mathematical Audio Lectures, Music Induced Meditation, and Mental Arithmetic Exercises. This paper focuses on open eye and closed eye conditions, as well as meditation states in laboratory conditions. We assess similarities and differences between experimental modalities and their associated brain states as well as differences between the different tools for analysis and equipment.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2017, 7, 4; 287-299
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A proposal of biologically inspired hierarchical approach to object recognition
Autorzy:
Kozik, R.
Powiązania:
https://bibliotekanauki.pl/articles/333962.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
object recognition
hierarchical model
feature extraction
visual cortex
computer vision
rozpoznawanie obiektów
model hierarchiczny
kora wzrokowa
wizja komputerowa
Opis:
In this article a biologically-inspired algorithm for object recognition is presented. The approach is based on a hierarchical HMAX cortex model that was initially proposed by Riesenhuber and Poggio [12] and later extended by Serre et al [13]. The results show that despite the modification that were undertaken to simplify the HMAX model (in order to make it feasible for a real-time solutions) it is possible to achieve high effectiveness for a one-class detection problems. Moreover, it is also demonstrated how the proposed algorithm can be successfully deployed on a low-cost Android smartphone.
Źródło:
Journal of Medical Informatics & Technologies; 2013, 22; 169-176
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Scientific Inquiry: Galen’s Optics in Dreams of Vision, Light & Pre-Natal Memory
Autorzy:
Gardiner, Judy B.
Powiązania:
https://bibliotekanauki.pl/articles/545523.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Gdański. Wydział Filologiczny
Tematy:
Dreaming
Amygdala
Brain
Light
Cognitive/Sensory Processing
Consciousness
Claudius Galen
HPA Axis
Intuition-Instinct-Insight
Memory
Neuroanatomy
Optic Disc
Optogenetics
Optic Nerve
Soul
Synapse
Third Ventricle
Universal Mind
Visual Cortex
Opis:
The following inquiry is derived from a 1994 experiential study in dreaming consciousness in which a series of thirty-eight interlocking dreams revealed Claudius Galen’s (c130-201) pneumatic doctrine of vision. The research centers on the relationship of light in the brain to vision and memory. The objective is to contribute to the understanding of consciousness by elucidating learning-related patterns of neural activity guided by associative recognition in dream-wake states. Scientific breakthroughs introducing photons of light to control brain activity strengthened the findings. Premises stemming from neuroscientific and spiritual insights: *Activation of light in the optic disc may open the visual field to access pre-natal memory. *A unified sixth sense merging Intuition-Insight-Instinct may have its locus in the infundibular recess of the third ventricle. *Memory matrix in the amygdala relays information to the sixth sense thereby serving all sense organs.
Źródło:
Jednak Książki. Gdańskie Czasopismo Humanistyczne; 2015, 4; 191-212
2353-4699
Pojawia się w:
Jednak Książki. Gdańskie Czasopismo Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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