A comparison of the distribution of the cerebellar and cortical connections of the nucleus of Darkschewitsch (ND) in the cat: a study using anterograde and retrograde HRP tracing techniques

1989 ◽  
Vol 180 (5) ◽  
pp. 485-496 ◽  
Author(s):  
J. G. Rutherford ◽  
A. Zuk-Harper ◽  
D. G. Gwyn
Keyword(s):  
Cortical Connections ◽  
Tracing Techniques ◽  
Nucleus Of Darkschewitsch

COMPREHENSIVE GEOLOCATION OF PREFERENTIAL GROUNDWATER DISCHARGES USING HEAT TRACING TECHNIQUES

2018 ◽  
Author(s):  
Martin A. Briggs ◽  
◽  
Cian Dawson ◽  
Christopher L. Holmquist-Johnson ◽  
Ashley M. Helton ◽  
...  
Keyword(s):  
Tracing Techniques

scholarly journals An architectonic type principle in the development of laminar patterns of cortico-cortical connections

2021 ◽  
Author(s):  
Sarah F. Beul ◽  
Alexandros Goulas ◽  
Claus C. Hilgetag
Keyword(s):  
Structural Connectivity ◽  
Macaque Monkey ◽  
Brain Regions ◽  
Adult Brain ◽  
Mammalian Brain ◽  
Cortical Connections ◽  
Cortical Projections ◽  
Structural Connections ◽  
High Degree ◽  
The Brain

AbstractStructural connections between cortical areas form an intricate network with a high degree of specificity. Many aspects of this complex network organization in the adult mammalian cortex are captured by an architectonic type principle, which relates structural connections to the architectonic differentiation of brain regions. In particular, the laminar patterns of projection origins are a prominent feature of structural connections that varies in a graded manner with the relative architectonic differentiation of connected areas in the adult brain. Here we show that the architectonic type principle is already apparent for the laminar origins of cortico-cortical projections in the immature cortex of the macaque monkey. We find that prenatal and neonatal laminar patterns correlate with cortical architectonic differentiation, and that the relation of laminar patterns to architectonic differences between connected areas is not substantially altered by the complete loss of visual input. Moreover, we find that the degree of change in laminar patterns that projections undergo during development varies in proportion to the relative architectonic differentiation of the connected areas. Hence, it appears that initial biases in laminar projection patterns become progressively strengthened by later developmental processes. These findings suggest that early neurogenetic processes during the formation of the brain are sufficient to establish the characteristic laminar projection patterns. This conclusion is in line with previously suggested mechanistic explanations underlying the emergence of the architectonic type principle and provides further constraints for exploring the fundamental factors that shape structural connectivity in the mammalian brain.

scholarly journals Light shaping from a physical-optics point of view

2020 ◽  
Vol 238 ◽  
pp. 02006
Author(s):  
Liangxin Yang ◽  
Irfan Badar ◽  
Christian Hellmann ◽  
Frank Wyrowski
Keyword(s):  
Fourier Transform ◽  
Optical Element ◽  
Initial Guess ◽  
Point Of View ◽  
Physical Optics ◽  
Diffraction Effect ◽  
Geometric Optics ◽  
Design Task ◽  
Tracing Techniques

In the design of optical element for light shaping, a geometric-optics assumption is usually used, where the validity of the assumption is rarely discussed in literature. In this work, the field tracing techniques for modeling light-shaping systems are presented, which reveals the optical element resulted from those geometric-base algorithm is not always accurate enough for the design task. An example is demonstrated with the functional embodiment of the element. The simulation result shows that diffraction effect may occur, especially in paraxial situation. However, the designed result start with the assumption is well-introduced initial guess for further optimization with the iterative Fourier transform algorithm (IFTA).

Cortical connections of the claustrum and subjacent cell groups in the hedgehog tenrec

2001 ◽  
Vol 203 (5) ◽  
pp. 403-415 ◽  
Author(s):  
H. Künzle ◽  
S. Radtke-Schuller
Keyword(s):  
Cortical Connections ◽  
Cell Groups

Cortical connections and early visual function: intra- and inter-columnar processing

2003 ◽  
Vol 97 (2-3) ◽  
pp. 191-208 ◽  
Author(s):  
Ohad Ben-Shahar ◽  
Patrick S. Huggins ◽  
Tomas Izo ◽  
Steven W. Zucker
Keyword(s):  
Visual Function ◽  
Cortical Connections
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