Biomaterial Database

The terminal arborization pattern of primary afferent fibers in the substantia gelatinosa of the spinal cord in the cat. 1977

M Réthelyi, and J J Capowski

The spinal cords of adult cats were impregnated using the Golgi-Kopsch technique and cut in the sagittal plane. Richly arborizing axon-trees were found in the substantia gelatinosa (lamina II of Rexed). Axon arborizations, characterized by a long rostro-caudal course, a single-stem fiber, multiple-arborizing side branches and large terminal and en passant boutons, were subjected to a semi-quantitative and later to a computer-aided analysis. These arborizations, presumably of primary afferent origin (Réthelyi, 1977), are arranged in narrow sheets. The sheets of the individual arborizations are tilted with respect to the sagittal plane (the dorsal edge of the sheet having a more lateral position than the ventral edge), and tilted with respect to each other's plane, but they are rigorously oriented in the rostro-caudal direction. The average thickness of the sheets encompassing the terminal and en passant bulbs of these arborizations is 16.65 micrometer (S.D. = 2.86; n = 10). Occasionally, the side branches and terminal bulbs of a single stem fiber arborize into two separate sheets. These anatomical results suggest that the activity of the peripheral fibers spreads in long and narrow neuropil fields in the substantia gelatinosa. This pattern suggests a fine scale somatotopic arrangement.

UI	MeSH Term	Description	Entries
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
D003201	Computers	Programmable electronic devices designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations.	Calculators, Programmable,Computer Hardware,Computers, Digital,Hardware, Computer,Calculator, Programmable,Computer,Computer, Digital,Digital Computer,Digital Computers,Programmable Calculator,Programmable Calculators
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
D001369	Axons	Nerve fibers that are capable of rapidly conducting impulses away from the neuron cell body.	Axon
D013116	Spinal Cord	A cylindrical column of tissue that lies within the vertebral canal. It is composed of WHITE MATTER and GRAY MATTER.	Coccygeal Cord,Conus Medullaris,Conus Terminalis,Lumbar Cord,Medulla Spinalis,Myelon,Sacral Cord,Thoracic Cord,Coccygeal Cords,Conus Medullari,Conus Terminali,Cord, Coccygeal,Cord, Lumbar,Cord, Sacral,Cord, Spinal,Cord, Thoracic,Cords, Coccygeal,Cords, Lumbar,Cords, Sacral,Cords, Spinal,Cords, Thoracic,Lumbar Cords,Medulla Spinali,Medullari, Conus,Medullaris, Conus,Myelons,Sacral Cords,Spinal Cords,Spinali, Medulla,Spinalis, Medulla,Terminali, Conus,Terminalis, Conus,Thoracic Cords
D013376	Substantia Gelatinosa	Gelatinous-appearing material in the dorsal horn of the spinal cord, consisting chiefly of Golgi type II neurons and some larger nerve cells.	Lamina 2,Lamina II,Substantia Gelatinosa of Rolando,Gelatinosa, Substantia,Gelatinosas, Substantia,Rolando Substantia Gelatinosa,Substantia Gelatinosas