Biomaterial Database

Lack of collateral thalamocortical projections to fields of the first somatic sensory cortex in monkeys. 1983

E G Jones

Retrograde axoplasmic transport of differently colored fluorescent dyes was used to determine the distributions and relative proportions of cells in the ventrobasal complex of the monkey thalamus that project to each of the architectonic fields of the first somatic sensory cortex. Fast blue was injected into portions of area 3a identified by first recording short latency, multiunit responses to electrical stimulation of Group I afferents in a muscle nerve of the forelimb or hindlimb. Nuclear Yellow was later injected into a part of area 2 responding to maximal electrical stimulation of the same nerve. In experiments that served as controls, Fast Blue was injected into area 3b and Nuclear Yellow into area 1. The results confirm the division of the ventrobasal complex into: (i) a central core with an inner part projecting to area 3b and a surrounding part projecting area 1; (ii) a peripheral shell projecting to areas 3a and 2 (Jones et al. 1982). A far greater proportion of VB cells projects to areas 3b or 3a than to areas 1 or 2. In portions of the ventrobasal complex projecting to two areas, no cells were double labelled provided that the injections of blue and yellow dyes did not overlap. The results, thus, show a lack of collateral thalamocortical projections to the fields of the postcentral gyrus and, when taken in conjunction with other data, imply the independent relay of modality specific information through the thalamus.

UI	MeSH Term	Description	Entries
D007596	Joints	Also known as articulations, these are points of connection between the ends of certain separate bones, or where the borders of other bones are juxtaposed.	Joint
D008252	Macaca fascicularis	A species of the genus MACACA which typically lives near the coast in tidal creeks and mangrove swamps primarily on the islands of the Malay peninsula.	Burmese Long-Tailed Macaque,Crab-Eating Monkey,Cynomolgus Monkey,M. f. aurea,M. fascicularis,Macaca fascicularis aurea,Monkey, Crab-Eating,Monkey, Cynomolgus,Crab-Eating Macaque,Burmese Long Tailed Macaque,Crab Eating Macaque,Crab Eating Monkey,Crab-Eating Macaques,Crab-Eating Monkeys,Cynomolgus Monkeys,Long-Tailed Macaque, Burmese,Macaque, Burmese Long-Tailed,Macaque, Crab-Eating,Monkey, Crab Eating
D008856	Microscopy, Fluorescence	Microscopy of specimens stained with fluorescent dye (usually fluorescein isothiocyanate) or of naturally fluorescent materials, which emit light when exposed to ultraviolet or blue light. Immunofluorescence microscopy utilizes antibodies that are labeled with fluorescent dye.	Fluorescence Microscopy,Immunofluorescence Microscopy,Microscopy, Immunofluorescence,Fluorescence Microscopies,Immunofluorescence Microscopies,Microscopies, Fluorescence,Microscopies, Immunofluorescence
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D009474	Neurons	The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM.	Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
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
D003712	Dendrites	Extensions of the nerve cell body. They are short and branched and receive stimuli from other NEURONS.	Dendrite
D005552	Forelimb	A front limb of a quadruped. (The Random House College Dictionary, 1980)	Forelimbs
D006614	Hindlimb	Either of two extremities of four-footed non-primate land animals. It usually consists of a FEMUR; TIBIA; and FIBULA; tarsals; METATARSALS; and TOES. (From Storer et al., General Zoology, 6th ed, p73)	Hindlimbs
D000344	Afferent Pathways	Nerve structures through which impulses are conducted from a peripheral part toward a nerve center.	Afferent Pathway,Pathway, Afferent,Pathways, Afferent