A simple vector implementation of the Laplace-transformed cable equations in passive dendritic trees

1992 ◽  
Vol 68 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Jaap van Pelt
Keyword(s):  
Dendritic Trees

SCALING BEHAVIOR OF THE DENDRITIC BRANCHES OF THALAMIC NEURONS

Fractals ◽  
1993 ◽  
Vol 01 (02) ◽  
pp. 171-178 ◽  
Author(s):  
KLAUS-D. KNIFFKI ◽  
MATTHIAS PAWLAK ◽  
CHRISTIANE VAHLE-HINZ
Keyword(s):  
Growth Process ◽  
Scaling Law ◽  
Branching Ratio ◽  
Scaling Behavior ◽  
Neuronal Growth ◽  
Thalamic Neurons ◽  
Dendritic Trees ◽  
Ventrobasal Complex ◽  
Dendritic Branches

The morphology of Golgi-impregnated thalamic neurons was investigated quantitatively. In particular, it was sought to test whether the dendritic bifurcations can be described by the scaling law (d0)n=(d1)n+(d2)nwith a single value of the diameter exponent n. Here d0 is the diameter of the parent branch, d1 and d2 are the diameters of the two daughter branches. Neurons from two functionally distinct regions were compared: the somatosensory ventrobasal complex (VB) and its nociceptive ventral periphery (VBvp). It is shown that for the neuronal trees studied in both regions, the scaling law was fulfilled. The diameter exponent n, however, was not a constant. It increased from n=1.76 for the 1st order branches to n=3.92 for the 7th order branches of neurons from both regions. These findings suggest that more than one simple intrinsic rule is involved in the neuronal growth process, and it is assumed that the branching ratio d0/d1 is not required to be encoded genetically. Furthermore, the results support the concept of the dendritic trees having a statistically identical topology in neurons of VB and VBvp and thus may be regarded as integrative modules.

Structure-function relationships in the primate superior colliculus. I. Morphological classification of efferent neurons

1988 ◽  
Vol 60 (1) ◽  
pp. 232-262 ◽  
Author(s):  
A. K. Moschovakis ◽  
A. B. Karabelas ◽  
S. M. Highstein
Keyword(s):  
Superior Colliculus ◽  
Medium Size ◽  
Cerebral Peduncle ◽  
Parent Cell ◽  
Morphological Classification ◽  
Dendritic Trees ◽  
Efferent Neurons ◽  
Recurrent Collaterals ◽  
Stimulation Of

1. Neurons in the superior colliculus (SC) of anesthetized paralyzed squirrel monkeys were injected intracellularly with horseradish peroxidase (HRP) to establish a morphological classification of tectal efferent neurons in this species. These neurons were physiologically identified by their antidromic responses following stimulation of the contralateral predorsal bundle or SC. These cells also responded with postsynaptic potentials to stimulation of the ipsilateral substantia nigra and cerebral peduncle and the contralateral tectum. 2. Quantitative light microscopic analysis of the somatodendritic profiles and axonal trajectories of 27 recovered cells revealed the existence of three major groups of tectal efferent neurons: L (n = 7), X (n = 8), and T (n = 12). 3. L neurons are small or medium size cells with relatively elaborate dendritic trees and are located mainly in the superficial layers of the SC. They participate in the ipsilateral descending and dorsal ascending tectofugal bundles. Intrinsic collaterals of L axons deploy a large number of boutons both near the parent cell body and more ventrally within the deeper tectal layers. 4. X neurons are mostly large in size and multipolar in shape with relatively complex dendritic trees. Their cell bodies are situated mainly in the stratum griseum intermedium and occasionally in the stratum opticum. Axons of X neurons participate in the crossed descending and ipsilateral ventral ascending projections of the SC. In addition, the axonal system of about half of the X neurons includes recurrent collaterals. 5. T neurons are located mainly in the ventral stratum opticum and the dorsal stratum griseum intermedium. They have small or medium-sized, trapezoid or ovoid cell bodies and relatively simple radiating or vertical dendritic trees. Their axons usually participate in two of the major tectofugal bundles besides providing a commissural component and recurrent collaterals. 6. Morphological details revealed in the present study support the notion that distinct tectofugal axonal systems originate from efferent neurons of the primate SC that differ both as to their location in the tectum as well as the appearance of their somata and dendritic trees. The resulting morphological classification of tectal efferent cells provides a framework for the analysis of tectal function in terms of populations of identified neurons.

The path integral for dendritic trees

1991 ◽  
Vol 66 (1) ◽  
pp. 49-60 ◽  
Author(s):  
L. F. Abbott ◽  
E. Farhi ◽  
Sam Gutmann
Keyword(s):  
Path Integral ◽  
Dendritic Trees

Compartmental-model response function for dendritic trees

1993 ◽  
Vol 70 (2) ◽  
pp. 199-207 ◽  
Author(s):  
Paul C. Bressloff ◽  
John G. Taylor
Keyword(s):  
Response Function ◽  
Compartmental Model ◽  
Dendritic Trees ◽  
Model Response

Signal Delay in Passive Dendritic Trees

1993 ◽  
pp. 73-77
Author(s):  
Hagai Agmon-Snir ◽  
Idan Segev
Keyword(s):  
Signal Delay ◽  
Dendritic Trees

JuvenileTaieprats have shorter dendritic trees in the dorsal field of the hippocampus without spatial learning disabilities

Synapse ◽  
2018 ◽  
Vol 72 (6) ◽  
pp. e22024 ◽  
Author(s):  
Adriana B. Silva-Gómez ◽  
Dolores A. Bravo-Duran ◽  
Jose R. Eguibar ◽  
Carmen Cortes
Keyword(s):  
Learning Disabilities ◽  
Spatial Learning ◽  
Dendritic Trees

Interneurones in Crab Connectives (Carcinus Maenas (L.)): Giant Fibres

1974 ◽  
Vol 61 (3) ◽  
pp. 593-613
Author(s):  
PETER J. FRASER
Keyword(s):  
Electrical Stimulation ◽  
Carcinus Maenas ◽  
Dendritic Trees ◽  
Tactile Stimuli ◽  
Giant Fibres ◽  
The Brain

Five interneurones with cell bodies and dendritic trees in the brain have axons 40-60µm diameter in one oesophageal connective. The fibres are phasic and multimodal, responding to visual and tactile stimuli. They have complex adaptation properties and two are suppressed completely during certain movements of the animal. The role of the fibres in overt behaviour has not been revealed by electrical stimulation or by examination of output in free walking animals. Several smaller interneurones in the connective are briefly described anatomically and physiologically.

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