Biomaterial Database

Patterns of organization of the corticotectal projection of cats studied by means of the anterograde degeneration method. 1979

T Konno

By using the Fink and Heimer method, patterns of organization of the cat corticotectal projection have been studied in more detail than previously known. Collicular projections from various cortical areas show specific laminar distributions in tectal layers, while there is a considerable overlap in areas of terminations. Thus the superficial layers of the superior colliculus receive fibers almost exclusively from the visual cortex, while the deep layers from the auditory and the somatic sensory areas. In the intermediate gray layer, fibers from the visual, auditory and somatic sensory areas terminate in extensive areas throughout the colliculus. These findings are in good accord with physiological observations. Fibers from the "association", orbital, proreate and cingulate areas end in the intermediate and deep layers as well. Patch-like terminations of projection zones from the somatic sensory cortex are observed in the superior colliculus, longitudinally arranged with approximately 200-250 micrometer width and spaced at 200-500 micrometer. Similar patterns of terminations appear to exist in projections from the visual cortex. The lateral portion of the mesencephalic periaqueductal gray matter has been found to be a recipient of cortical fibers from the somatic sensory, orbital and cingulate areas. Possible neuronal interconnections within the superior colliculus are discussed in connection with the recent physiological data.

UI	MeSH Term	Description	Entries
D007245	Inferior Colliculi	The posterior pair of the quadrigeminal bodies which contain centers for auditory function.	Colliculus, Inferior,Brachial Nucleus of the Inferior Colliculus,Caudal Colliculus,Colliculus Inferior,Inferior Colliculus,Posterior Colliculus,Colliculi, Inferior,Colliculus Inferiors,Colliculus, Caudal,Colliculus, Posterior,Inferior, Colliculus,Inferiors, Colliculus
D009410	Nerve Degeneration	Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways.	Neuron Degeneration,Degeneration, Nerve,Degeneration, Neuron,Degenerations, Nerve,Degenerations, Neuron,Nerve Degenerations,Neuron Degenerations
D009412	Nerve Fibers	Slender processes of NEURONS, including the AXONS and their glial envelopes (MYELIN SHEATH). Nerve fibers conduct nerve impulses to and from the CENTRAL NERVOUS SYSTEM.	Cerebellar Mossy Fibers,Mossy Fibers, Cerebellar,Cerebellar Mossy Fiber,Mossy Fiber, Cerebellar,Nerve Fiber
D002415	Cats	The domestic cat, Felis catus, of the carnivore family FELIDAE, comprising over 30 different breeds. The domestic cat is descended primarily from the wild cat of Africa and extreme southwestern Asia. Though probably present in towns in Palestine as long ago as 7000 years, actual domestication occurred in Egypt about 4000 years ago. (From Walker's Mammals of the World, 6th ed, p801)	Felis catus,Felis domesticus,Domestic Cats,Felis domestica,Felis sylvestris catus,Cat,Cat, Domestic,Cats, Domestic,Domestic Cat
D002540	Cerebral Cortex	The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulci. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions.	Allocortex,Archipallium,Cortex Cerebri,Cortical Plate,Paleocortex,Periallocortex,Allocortices,Archipalliums,Cerebral Cortices,Cortex Cerebrus,Cortex, Cerebral,Cortical Plates,Paleocortices,Periallocortices,Plate, Cortical
D006179	Gyrus Cinguli	One of the convolutions on the medial surface of the CEREBRAL HEMISPHERES. It surrounds the rostral part of the brain and CORPUS CALLOSUM and forms part of the LIMBIC SYSTEM.	Anterior Cingulate Gyrus,Brodmann Area 23,Brodmann Area 24,Brodmann Area 26,Brodmann Area 29,Brodmann Area 30,Brodmann Area 31,Brodmann Area 32,Brodmann Area 33,Brodmann's Area 23,Brodmann's Area 24,Brodmann's Area 26,Brodmann's Area 29,Brodmann's Area 30,Brodmann's Area 31,Brodmann's Area 32,Brodmann's Area 33,Cingulate Gyrus,Gyrus Cinguli Anterior,Retrosplenial Complex,Retrosplenial Cortex,Anterior Cingulate,Anterior Cingulate Cortex,Cingular Gyrus,Cingulate Area,Cingulate Body,Cingulate Cortex,Cingulate Region,Gyrus, Cingulate,Posterior Cingulate,Posterior Cingulate Cortex,Posterior Cingulate Gyri,Posterior Cingulate Gyrus,Posterior Cingulate Region,Superior Mesial Regions,24, Brodmann Area,Anterior Cingulate Cortices,Anterior Cingulates,Anterior, Gyrus Cinguli,Anteriors, Gyrus Cinguli,Area 23, Brodmann,Area 23, Brodmann's,Area 24, Brodmann,Area 24, Brodmann's,Area 26, Brodmann,Area 26, Brodmann's,Area 29, Brodmann,Area 29, Brodmann's,Area 30, Brodmann,Area 30, Brodmann's,Area 31, Brodmann,Area 31, Brodmann's,Area 32, Brodmann,Area 32, Brodmann's,Area 33, Brodmann,Area 33, Brodmann's,Area, Cingulate,Body, Cingulate,Brodmanns Area 23,Brodmanns Area 24,Brodmanns Area 26,Brodmanns Area 29,Brodmanns Area 30,Brodmanns Area 31,Brodmanns Area 32,Brodmanns Area 33,Cingulate Areas,Cingulate Bodies,Cingulate Cortex, Anterior,Cingulate Cortex, Posterior,Cingulate Gyrus, Anterior,Cingulate Gyrus, Posterior,Cingulate Region, Posterior,Cingulate Regions,Cingulate, Anterior,Cingulate, Posterior,Cinguli Anterior, Gyrus,Cinguli Anteriors, Gyrus,Complex, Retrosplenial,Cortex, Anterior Cingulate,Cortex, Cingulate,Cortex, Posterior Cingulate,Cortex, Retrosplenial,Gyrus Cinguli Anteriors,Gyrus, Anterior Cingulate,Gyrus, Cingular,Gyrus, Posterior Cingulate,Posterior Cingulate Cortices,Posterior Cingulate Regions,Posterior Cingulates,Region, Cingulate,Region, Posterior Cingulate,Retrosplenial Complices,Retrosplenial Cortices,Superior Mesial Region
D000344	Afferent Pathways	Nerve structures through which impulses are conducted from a peripheral part toward a nerve center.	Afferent Pathway,Pathway, Afferent,Pathways, Afferent
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia
D013477	Superior Colliculi	The anterior pair of the quadrigeminal bodies which coordinate the general behavioral orienting responses to visual stimuli, such as whole-body turning, and reaching.	Colliculus, Superior,Optic Lobe, Human,Optic Lobe, Mammalian,Optic Tectum,Anterior Colliculus,Superior Colliculus,Tectum, Optic,Colliculi, Superior,Colliculus, Anterior,Human Optic Lobe,Human Optic Lobes,Mammalian Optic Lobe,Mammalian Optic Lobes,Optic Lobes, Human,Optic Lobes, Mammalian,Optic Tectums,Tectums, Optic
D014795	Visual Pathways	Set of cell bodies and nerve fibers conducting impulses from the eyes to the cerebral cortex. It includes the RETINA; OPTIC NERVE; optic tract; and geniculocalcarine tract.	Pathway, Visual,Pathways, Visual,Visual Pathway