Neuronal and synaptic organization of the lateral geniculate nucleus of the tree shrew, Tupaia glis

1982 ◽  
Vol 224 (1) ◽  
pp. 207-223 ◽  
Author(s):  
F. Hajdu ◽  
R. Hassler ◽  
Gy. Somogyi
Keyword(s):  
Lateral Geniculate Nucleus ◽  
Tree Shrew ◽  
Synaptic Organization ◽  
Lateral Geniculate ◽  
Tupaia Glis

Laminar organization of tree shrew dorsal lateral geniculate nucleus

1983 ◽  
Vol 50 (6) ◽  
pp. 1330-1342 ◽  
Author(s):  
J. L. Conway ◽  
P. H. Schiller
Keyword(s):  
Lateral Geniculate Nucleus ◽  
Tree Shrew ◽  
Visual Stimuli ◽  
Optic Tract ◽  
Cell Types ◽  
Dorsal Lateral Geniculate Nucleus ◽  
Lateral Geniculate ◽  
Tupaia Glis ◽  
Dorsal Lateral Geniculate ◽  
Laminar Specificity

This study investigated the organization of the dorsal lateral geniculate nucleus (LGN) of the tree shrew (Tupaia glis) using both microelectrode recording and anatomical techniques. The tree shrew LGN contains approximately 100,000 cells, of which 20% are in layers 2 and 6. These two layers receive input from the ipsilateral eye. The topography of the tree shrew LGN was delineated by taking systematic penetrations through the structure. Examination of the organization of the LGN laminae showed the following: in layer 1 (the lamina next to the optic tract) a mixture of on-center, off-center and on-off center cells was found; the majority of these cells responded transiently to visual stimuli and they had slightly longer conduction latencies than did cells in the other laminae. On-center and off-center cells in laminae 2-6 were sharply segregated: layers 2, 3, and 4 contained off-center cells and layers 5 and 6 contained on-center cells. Most of the cells in laminae 2-6 responded in a sustained manner to visual stimuli. These results suggest that one function of the LGN lamina is to group cells into various classes. Such grouping has now been shown to occur partially or completely for 1) eye of origin, 2) cell types characterized as on-center and off-center, and 3) cell types characterized as producing transient and sustained responses. The nature and degree of laminar specificity, however, varies considerably from species to species.

A quantitative electron-microscopical study of the postnatal development of the lateral geniculate nucleus in normal kittens and in kittens with eyelid suture

1980 ◽  
Vol 210 (1179) ◽  
pp. 211-234 ◽  
Keyword(s):  
Electron Microscope ◽  
Postnatal Development ◽  
Lateral Geniculate Nucleus ◽  
Normal Development ◽  
Microscopical Study ◽  
Electron Microscopical Study ◽  
Synaptic Organization ◽  
Eyelid Closure ◽  
Lateral Geniculate ◽  
Electron Microscopical

The postnatal development of the lateral geniculate nucleus has been studied quantitatively with the electron microscope in normal kittens and in kittens with eyelid closure. The maturation of the synaptic organization of glomeruli in the normal kitten occurs during the period of susceptibility to eyelid closure and is due predominantly to a logarithmic increase in the number of symmetric presynaptic dendritic synapses. In contrast, the pro­portion of symmetric synapses falls with age in non-glomerular neuropil over this period. Unilateral and bilateral eyelid suture do not interfere with the normal development of the lateral geniculate nucleus.

scholarly journals Transformation of Receptive Field Properties from Lateral Geniculate Nucleus to Superficial V1 in the Tree Shrew

2013 ◽  
Vol 33 (28) ◽  
pp. 11494-11505 ◽  
Author(s):  
S. D. Van Hooser ◽  
A. Roy ◽  
H. J. Rhodes ◽  
J. H. Culp ◽  
D. Fitzpatrick
Keyword(s):  
Receptive Field ◽  
Lateral Geniculate Nucleus ◽  
Tree Shrew ◽  
Lateral Geniculate ◽  
Receptive Field Properties
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