Acknowledgements: Thanks to Marcia Feinberg and Karen Szumowski for assistance with figures. Thanks also to Betsy Velasquez for assistance with the bibliographic material. Contributions to some three-dimensional reconstructions were made by Josef Spacek and Rachel Ventura. Summary Dendrites are extensions of the cell body of the neuron specialized for receiving and processing the vast majority ...

Dendrites are extensions of the cell body of the neuron specialized for receiving and processing the vast majority of excitatory synaptic inputs. Dendrites exhibit enormously diverse forms. In many cases the shape of the dendritic arbor can be related to the mode of connectivity between neurons, with dendrites often ramifying in characteristic spatial domains where they receive specific inputs....

A coarse and a fine dendrite structure were produced using the newly developed DS-superalloy ExAl7 ( IN792 with 2-3 wt.-% Re) by changing the conditions of directional solidification. The two microstructures differed in their primary dendrite arm spacing by a factor of 1.6. During aging, very fine TCP phase precipitates (length approximately 20 m, volume fraction ~ 1 %) were precipitated in the...

Aluminum/alumina composites are used in automotive and aerospace industries due to their low density and good mechanical strength. In this research, the effect of mechanical stirring of slurry in liquid-solid phase temperature and injection of alumina powder with inert gas (Ar) on microstructure and mechanical properties of Al-A356 alloy is investigated. In order to improve of the wettability a...

Amyloid-beta (Abeta) overproduction and dendrite arbor atrophy are hallmarks of Alzheimer's disease. The RhoA GTPase (Rho) signals through Rho kinase (ROCK) to control cytoskeletal dynamics and regulate neuron structure. Hyperactive Rho signaling destabilizes neurons leading to dendritic regression that can be rescued by genetic or pharmacological reduction of ROCK signaling. To understand what...

Evidence has been obtained that the microtubules of the insect sensory dendrite may originate from the nine pairs of peripheral fibrils in the ciliary portion of the dendrite and retain direct continuity with them. The peripheral fibrils separate and each of the single fibrils resulting appears to divide one or more times. The number of microtubules within the dendrite distal to the ciliary reg...

The cuticular parts of the aphid plate organ consist of an outer and an inner layer. Both are transparent and in the space between them are many fine branches of the half dozen, or more, sensory neurones which lie below the plate. Each dendrite narrows, a short distance above its cell body, and assumes the structure of a cilium with 9 pairs of peripheral fibrils, a ciliary collar, and basal bod...