Author: National Library of Medicine (U.S.)Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 704
Book Description
First multi-year cumulation covers six years: 1965-70.
Current Catalog
Author: National Library of Medicine (U.S.)Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 704
Book Description
First multi-year cumulation covers six years: 1965-70.
National Library of Medicine Current Catalog
Author: National Library of Medicine (U.S.)Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1328
Book Description
Neurovision: Neural bases of binocular vision and coordination and their implications in visual training programs
Author: Olivier A. CoubardPublisher: Frontiers Media SA
ISBN: 2889196550
Category : Binocular vision
Languages : en
Pages : 266
Book Description
Binocular vision is achieved by five neurovisual systems originating in the retina but varying in their destination within the brain. Two systems have been widely studied: the retino-tectal or retino-collicular route, which subserves an expedient and raw estimate of the visual scene through the magnocellular pathway, and the retino-occipital or retino-cortical route, which allows slower but refined analysis of the visual scene through the parvocellular pathway. But there also exist further neurovisual systems: the retino-hypothalamic, retino-pretectal, and accessory optic systems, which play a crucial role in vision though they are less understood. The retino-pretectal pathway projecting onto the pretectum is critical for the pupillary or photomotor reflex. The retino-hypothalamic pathway projecting onto the suprachiasmatic nucleus regulates numerous behavioral and biological functions as well as circadian rhythms. The accessory optic system targeting terminal lateral, medial and dorsal nuclei through the paraoptic fasciculus plays a role in head and gaze orientation as well as slow movements. Taken together, these neurovisual systems involve 60% of brain activity, thus highlighting the importance of vision in the functioning and regulation of the central nervous system. But vision is first and foremost action, which makes perception impossible without movement. Binocular coordination is a prerequisite for binocular fusion of the object of interest on the two foveas, thus ensuring visual perception. The retino-collicular pathway is sufficient to elicit reflexive eye movements with short latencies. Thanks to its motor neurons, the superior colliculus activates premotor neurons, which themselves activate motor neurons of the oculomotor, trochlear and abducens nuclei. At a higher level, a cascade of neural mechanisms participates in the control of decisional eye movements. The superior colliculus is controlled by the substancia nigra pars reticulata, which is itself gated by subcortical structures such as the dorsal striatum. The superior colliculus is also inhibited by the dorsolateral prefrontal cortex through a direct prefrontotectal tract. Cortical areas are crucial for the triggering of eye movements: the frontal eye field, supplementary eye field, and parietal eye field. Finally the cerebellum maintains accuracy. The focus of the present research topic, entitled Neural bases of binocular vision and coordination and their implications in visual training programs, is to review the most recent findings in brain imaging and neurophysiology of binocular vision and coordination in humans and animals with frontally-placed eyes. The emphasis is put on studies that enable transfer of knowledge toward visual training programs targeting visual field defects (e.g., hemianopia) and binocular functional disorders (e.g., amblyopia).
Neuropsychologie du déficit visuel d'origine centrale chez l'enfant
Author: Martine BarbeauPublisher: FeniXX
ISBN: 2130667465
Category : Psychology
Languages : fr
Pages : 132
Book Description
L'étrangeté d'une vision intermittente, d'une capacité de voir sans reconnaître, laisse perplexe l'entourage d'un malade aux prises avec des phénomènes paradoxaux si éloignés des caractéristiques classiques du déficit visuel : enfin, voit-il ou ne voit-il pas ? Lorsqu'il s'agit d'un enfant, la réponse à la question posée est encore plus cruciale puisque les réactions parentales, les décisions thérapeutiques, et les orientations éducatives, vont infléchir si lourdement l'avenir. Sans compter que le petit nombre d'enfants touchés par un tel handicap ne favorise pas l'adaptation des structures à ces cas singuliers. Cet ouvrage est la résultante d'une pratique clinique auprès d'enfants cérébro-lésés, présentant un déficit visuel permanent d'origine centrale. Il présente les particularités de ce tableau clinique par rapport à celui de l'adulte, en présentant les perspectives thérapeutiques. Il relie à cet aspect pratique une théorisation sur l'acte visuel, et ce que la pathologie peut donner à connaître des processus à la genèse de cette fonction. Car, que veut dire exactement voir ?
French books in print, anglais
Author: ElectrePublisher:
ISBN: 9782765407881
Category :
Languages : fr
Pages : 1844
Book Description
Pragmatic Development in First Language Acquisition
Author: Danielle MatthewsPublisher: John Benjamins Publishing Company
ISBN: 9027270449
Category : Language Arts & Disciplines
Languages : en
Pages : 402
Book Description
Pragmatic development is increasingly seen as the foundation stone of language acquisition more generally. From very early on, children demonstrate a strong desire to understand and be understood that motivates the acquisition of lexicon and grammar and enables ever more effective communication. In the 35 years since the first edited volume on the topic, a flourishing literature has reported on the broad set of skills that can be called pragmatic. This volume aims to bring that literature together in a digestible format. It provides a series of succinct review chapters on 19 key topics ranging from preverbal skills right up to irony and argumentative discourse. Each chapter equips the reader with an overview of current theories, key empirical findings and questions for new research. This valuable resource will be of interest to scholars of psychology, linguistics, speech therapy, and cognitive science.
Prefrontal Cortex Cognitive Deficits in Children Treated Early and Continuously for PKU
Author: Adele DiamondPublisher:
ISBN:
Category : Medical
Languages : en
Pages : 220
Book Description
Phenylketonuria (PKU) is the leading biochemical cause for mental retardation in children. The study suggests levels of tyrosine reaching the brain are directly relational to the cognitive functions in the prefrontal cortex.
Ensemble Des Troubles Causés Par L'alcoolisation Foetale (ETCAF)
Author: Public Health Agency of CanadaPublisher: Agence de santé publique du Canada
ISBN:
Category : Children of prenatal alcohol abuse
Languages : fr
Pages : 16
Book Description
Aphasiology
Author: André Roch LecoursPublisher: Bailliere Tindall Limited
ISBN:
Category : Medical
Languages : en
Pages : 520
Book Description
Infantile Autisme
Author: Catherine BarthélémyPublisher:
ISBN:
Category : Medical
Languages : en
Pages : 428
Book Description