Anatomy of visual afferents in salamander brain

1980 ◽  
Vol 67 (4) ◽  
pp. 203-204 ◽  
Author(s):  
B. Fritzsch ◽  
W. Himstedt
Keyword(s):  
Visual Afferents

Organization of the visual afferents into the LGd and the pulvinar of the tree shrewTupaia glis

1975 ◽  
Vol 90 (1) ◽  
pp. 153-158 ◽  
Author(s):  
T. Ohno ◽  
U. Misgeld ◽  
S.T. Kitai ◽  
A. Wagner
Keyword(s):  
Visual Afferents

Directional selectivities of visual afferents to the pretectal neuropil in the fire salamander

1987 ◽  
Vol 404 (1-2) ◽  
pp. 332-334 ◽  
Author(s):  
Michael Sperl ◽  
Gerhard Manteuffel
Keyword(s):  
Fire Salamander ◽  
Visual Afferents

scholarly journals Somatosensory Crossmodal Plasticity in Superior Colliculus of Visually Deafferented Rats

2021 ◽  
Vol 9 (5) ◽  
Author(s):  
Luis Millan ◽  
Juan Charaven
Keyword(s):  
Visual Cortex ◽  
Superior Colliculus ◽  
Barrel Cortex ◽  
Young Animal ◽  
Sensory Information ◽  
The Other ◽  
Reactive Synaptogenesis ◽  
Somatosensory Information ◽  
Crossmodal Plasticity ◽  
Visual Afferents

Terminal fields of a certain pathway result denervated if the regeneration after the lesion of the pathway fails. If the lesion happened in a young animal, terminal fields of other nervous pathways that are spatially coincident or are close to the denervated field, growth of axon collaterals or reactive synaptogenesis could take place and reinervate deafferented neurons. In that way these denervated neurons can be recruited for functional compensatory responses and can convey information to areas that result enriched with additional inputs to be processed. The present paper reviews the plastic reactions that take place in the superior colliculus, a mesencephalic layered structure, after the neonatal suppression of its visual afferents that terminate in its superficial layers. The postlesional reactive ascending growth of somatosensory afferents that in control animals innervate intermediate and deep collicular layers invade the superficial layers and connect with visually deafferented cells that result recruited for descendent collicular responses and to send sensory information to the visual cortex via the colliculo-geniculate payhway. In that way in neonatally deafferented animals, somatosensory information gains additional territory to be processed. Two somatosensory connections to the superior collicuus will be discussed in this review. One ascending from the cuneitorm nucleus and the other descending that originates in the barrel cortex.

Somatic and visual afferents through centromedian to the postcruciate cortex

1975 ◽  
Vol 15 (5) ◽  
pp. 603-609 ◽  
Author(s):  
James H. O'Brien ◽  
Stuart M. Rosenblum
Keyword(s):  
Visual Afferents

Distortions of Vision and Pain: Two Functional Facets of D-Lysergic Acid Diethylamide

1979 ◽  
Vol 49 (2) ◽  
pp. 499-528 ◽  
Author(s):  
John Michael Williams
Keyword(s):  
Visual Perception ◽  
Receptive Fields ◽  
Lysergic Acid ◽  
Lysergic Acid Diethylamide ◽  
Dorsal Lateral Geniculate Nucleus ◽  
Psychotic Symptoms ◽  
Visual Effects ◽  
Drug Actions ◽  
Dorsal Lateral Geniculate ◽  
Visual Afferents

D-lysergic acid diethylamide (LSD) produces distortions of visual perception and analgesia. Evidence is advanced from a functional standpoint that the observed visual effects result from an attenuation of light-evoked input to the dorsal lateral geniculate nucleus (LGN) from the purely centripetal pathways of the retina. More slowly responding visual afferents or those with more complex receptive fields seem to be affected most. LSD analgesia, accompanied by severe psychotic symptoms, appears to result from drug actions on a centrifugally controlled pain system involving neurons of the midbrain raphe.

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