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A stereotaxic atlas of the brain of the pigeon (Columba livia)
FOREWORD The problems of evolution rank among mankind's most enduring interests, and it is therefore not surprising that virtually every branch of biology and medicine has ramified in the direction
Correlations of Neuronal and Microvascular Densities in Murine Cortex Revealed by Direct Counting and Colocalization of Nuclei and Vessels
It is well known that the density of neurons varies within the adult brain. In neocortex, this includes variations in neuronal density between different lamina as well as between different regions.
Morphology and connections of nucleus isthmi pars magnocellularis in chicks (Gallus gallus)
The laminar and columnar pattern of isthmotectal terminals also suggests a means of interacting with multiple tectofugal pathways, including the stratified subpopulations of tectorotundal neurons participating in motion detection.
Neural connections of the “visual wulst” of the avian telencephalon. Experimental studies in the pigeon (Columba livia) and owl (Speotyto cunicularia)
Retinal fibers in both the pigeon and owl terminate in a multi‐nucleate complex of the dorsal thalamus, including the nucleus opticus principalis thalami (OPT), which appears to be a separate functional system of still undetermined nature.
Connections of the auditory forebrain in the pigeon (columba livia)
The organization of Field L2, and that of its flanking regions, L1 and L3, was investigated with 14C‐2‐deoxyglucose, cytochrome oxidase, and both retrograde and anterograde tracing techniques.
Projections of the nucleus of the basal optic root in the pigeon: An autoradiographic and horseradish peroxidase study
The efferent projections of the nBOR complex, have been studied with both anterograde autoradiographic and retrograde horseradish peroxidase (HRP) techniques. The nBOR complex includes three distinct
Organization of the tectofugal visual pathway in the pigeon: A retrograde transport study
To examine the detailed organization of this principal ascending visual pathway, small injections of the marker horseradish peroxidase were placed in various sites throughout the ectostriatum (E) or nucleus rotundus (Rt) in pigeons, indicating the tectofugal pathway to be comprised of at least five different channels.
Columnar projections from the cholinergic nucleus isthmi to the optic tectum in chicks (Gallus gallus): A possible substrate for synchronizing tectal channels
It is proposed that dense arborizations of Ipc axons may be directed to the distal dendritic bottlebrushes of motion detecting tectal ganglion cells (TGCs) and may provide synchronous activation of a group of adjacent bottlebrushed of different TGCs of the same type via their intralaminar processes, and cross channel activation of different types of T GCs within the same column of visual space.
Two distinct populations of tectal neurons have unique connections within the retinotectorotundal pathway of the pigeon (Columba livia)
It is proposed that there are two distinct types of layer 13 neurons that project to the rotundus, and that these axons are derived from a population of small retinal ganglion cells that terminate on the distal dendrites of type I neurons.