Journal ArticleDOI
Sources of subcortical projections to the superior colliculus in the cat.
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A comprehensive search for subcortical projections to the cat superior colliculus was conducted using the retrograde horseradish peroxidase (HRP) method.Abstract:
A comprehensive search for subcortical projections to the cat superior colliculus was conducted using the retrograde horseradish peroxidase (HRP) method. Over 40 different subcortical structures project to the superior colliculus. The more notable among these are grouped under the following categories.
Visual structures: ventral lateral geniculate nucleus, parabigeminal nucleus, pretectal area (nucleus of the optic tract, posterior pretectal nucleus, nuclei of the posterior commissure).
Auditory structures: inferior colliculus (external and pericentral nuclei), dorsomedial periolivary nucleus, nuclei of the trapezoid body, ventral nucleus of the lateral lemniscus.
Somatosensory structures: sensory trigeminal complex (all divisions, but mainly the γ division of nucleus oralis), dorsal column nuclei (mostly cuneate nucleus), and the lateral cervical nucleus.
Catecholamine nuclei: locus coeruleus, raphe dorsalis, and the parabrachial nuclei.
Cerebellum: medial, interposed, and lateral nuclei, and the perihypoglossal nuclei.
Reticular areas: zona incerta, substantia nigra, midbrain tegmentum, nucleus paragigantocellularis lateralis, and the hypothalamus.
Evidence is presented that only the parabigeminal nucleus, the nucleus of the optic tract, and the posterior pretectal nucleus project to the superficial collicular layers (striatum griseum superficiale and stratum opticum), while all other afferents terminate in the deeper layers of the colliculus. Also presented is information concerning the rostrocaudal distribution of some of these afferent connections. These findings stress the multiplicity and diversity of inputs to the deeper collicular layers, and more specifically, identify multiple sources of the physiologically well-known representations of the somatic and auditory modalities in the colliculus.read more
Citations
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Relationships between Pupil Diameter and Neuronal Activity in the Locus Coeruleus, Colliculi, and Cingulate Cortex.
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A PHA-L analysis of ascending projections of the dorsal raphe nucleus in the rat.
TL;DR: Ascending projections from the dorsal raphe nucleus were examined in the rat by using the anterograde anatomical tracer, Phaseolus vulgaris leucoagglutinin (PHA‐L).
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Cholinergic systems in the rat brain: III. Projections from the pontomesencephalic tegmentum to the thalamus, tectum, basal ganglia, and basal forebrain
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TL;DR: The ascending cholinergic projections of the pedunculopontine and dorsolateral tegmental nuclei, referred to collectively as the pontomesencephalotegmental (PMT) cholinergy complex, were investigated by use of fluorescent tracer histology in combination with choline-O-acetyltransferase (ChAT) immunohistochemistry and acetylcholinesterase (AChE) pharmacohistochemical.
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Translation of sensory signals into commands for control of saccadic eye movements: role of primate superior colliculus
TL;DR: New and/or improved models of the role of the SC in sensorimotor integration are needed as guides for future research and it may be fruitful to examine the function of theSC from a motor perspective.
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Frontal eye field as defined by intracortical microstimulation in squirrel monkeys, owl monkeys, and macaque monkeys. II. Cortical connections.
TL;DR: Physiological and anatomical approaches were combined in the same animals to reveal the locations, extents, and cortical connections of the frontal eye fields (FEF) in squirrel, owl, and macaque monkeys.
References
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Book
The brain stem of the cat : a cytoarchitectonic atlas with stereotaxic coordinates
TL;DR: This slim (73 text pages) volume stresses the "integrating functions of the vagi" in discussing vagal influences on the cardiovascular, respiratory, and gastrointestinal systems.
Journal ArticleDOI
The laminar organization of dorsal horn and effects of descending impulses.
TL;DR: An examination of the physiological properties of cells in cat lumbar dorsal horn shows that there are three horizontal laminae which correspond approximately to Rexed (1952) laminaes 4, 5, and 6.
Journal ArticleDOI
An autoradiographic study of the efferent connections of the superior colliculus in the cat
TL;DR: The differential projections of the three main cellular strata of the superior colliculus have been examined in the cat by the autoradiographic method and several of these projections are topographically organized.