Synaptogenesis in the primary visual cortex of the tree shrew (Tupaia belangeri)

1991 ◽  
Vol 308 (3) ◽  
pp. 491-504 ◽  
Author(s):  
Alfred Ungersböck ◽  
Robert Kretz ◽  
Günter Rager
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Tree Shrew ◽  
Tupaia Belangeri

scholarly journals Functional organization of the primary visual cortex (areas 17 and 18) of the tree shrew revealed by optical brain imaging

2010 ◽  
Vol 9 (8) ◽  
pp. 770-770 ◽  
Author(s):  
M. Vanni ◽  
M. Villeneuve ◽  
M. Bickford ◽  
H. Petry ◽  
C. Casanova
Keyword(s):  
Visual Cortex ◽  
Brain Imaging ◽  
Primary Visual Cortex ◽  
Functional Organization ◽  
Tree Shrew ◽  
Areas 17 And 18

scholarly journals Functional and laminar dissociations between muscarinic and nicotinic cholinergic neuromodulation in the tree shrew primary visual cortex

2012 ◽  
Vol 35 (8) ◽  
pp. 1270-1280 ◽  
Author(s):  
Anwesha Bhattacharyya ◽  
Felix Bießmann ◽  
Julia Veit ◽  
Robert Kretz ◽  
Gregor Rainer
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Tree Shrew

scholarly journals On the Relation Between Receptive Field Structure and Stimulus Selectivity in the Tree Shrew Primary Visual Cortex

2013 ◽  
Vol 24 (10) ◽  
pp. 2761-2771 ◽  
Author(s):  
Julia Veit ◽  
Anwesha Bhattacharyya ◽  
Robert Kretz ◽  
Gregor Rainer
Keyword(s):  
Visual Cortex ◽  
Receptive Field ◽  
Primary Visual Cortex ◽  
Tree Shrew ◽  
Field Structure

scholarly journals Neural response dynamics of spiking and local field potential activity depend on CRT monitor refresh rate in the tree shrew primary visual cortex

2011 ◽  
Vol 106 (5) ◽  
pp. 2303-2313 ◽  
Author(s):  
Julia Veit ◽  
Anwesha Bhattacharyya ◽  
Robert Kretz ◽  
Gregor Rainer
Keyword(s):  
Visual Cortex ◽  
Primary Visual Cortex ◽  
Local Field ◽  
Local Field Potential ◽  
Tree Shrew ◽  
Field Potential ◽  
Neural Response ◽  
Refresh Rate ◽  
Cathode Ray Tube ◽  
Potential Activity

Entrainment of neural activity to luminance impulses during the refresh of cathode ray tube monitor displays has been observed in the primary visual cortex (V1) of humans and macaque monkeys. This entrainment is of interest because it tends to temporally align and thus synchronize neural responses at the millisecond timescale. Here we show that, in tree shrew V1, both spiking and local field potential activity are also entrained at cathode ray tube refresh rates of 120, 90, and 60 Hz, with weakest but still significant entrainment even at 120 Hz, and strongest entrainment occurring in cortical input layer IV. For both luminance increments (“white” stimuli) and decrements (“black” stimuli), refresh rate had a strong impact on the temporal dynamics of the neural response for subsequent luminance impulses. Whereas there was rapid, strong attenuation of spikes and local field potential to prolonged visual stimuli composed of luminance impulses presented at 120 Hz, attenuation was nearly absent at 60-Hz refresh rate. In addition, neural onset latencies were shortest at 120 Hz and substantially increased, by ∼15 ms, at 60 Hz. In terms of neural response amplitude, black responses dominated white responses at all three refresh rates. However, black/white differences were much larger at 60 Hz than at higher refresh rates, suggesting a mechanism that is sensitive to stimulus timing. Taken together, our findings reveal many similarities between V1 of macaque and tree shrew, while underscoring a greater temporal sensitivity of the tree shrew visual system.

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