Search results
Results from the WOW.Com Content Network
Distal apical dendrites extend upwards from the soma. The shorter proximal apical dendrites extend outward and below. Shape of majority of 2d section is approximately a cylinder with a pointed base for the apical arbor. [4] The apical dendrites and basal dendrites possess a radial organization pattern as they extend from the soma. [4]
A basal dendrite is a dendrite that emerges from the base of a pyramidal cell [1] that receives information from nearby neurons and passes it to the soma, or cell body. Due to their direct attachment to the cell body itself, basal dendrites are able to deliver strong depolarizing currents and therefore have a strong effect on action potential output in neurons. [2]
Basal dendrites arise from the base of the soma. The basal dendritic tree consists of three to five primary dendrites. As distance increases from the soma, the basal dendrites branch profusely. [1] Pyramidal cells are among the largest neurons in the brain. Both in humans and rodents, pyramidal cell bodies (somas) average around 20 μm in length.
Dendrites are one of two types of cytoplasmic processes that extrude from the cell body of a neuron, the other type being an axon. Axons can be distinguished from dendrites by several features including shape, length, and function. Dendrites often taper off in shape and are shorter, while axons tend to maintain a constant radius and can be very ...
The embryonic olfactory epithelium consists of fewer cell types than in the adult, including apical and basal progenitor cells, as well as immature olfactory sensory neurons. [9] Early embryonic neurogenesis relies mostly on the apical cells, while later stage embryonic neurogenesis and secondary neurogenesis in adults relies on basal stem ...
Dendritic spines serve as a storage site for synaptic strength and help transmit electrical signals to the neuron's cell body. Most spines have a bulbous head (the spine head), and a thin neck that connects the head of the spine to the shaft of the dendrite. The dendrites of a single neuron can contain hundreds to thousands of spines.
The sharp distinction between apical and baso-lateral domains is maintained by an active mechanism that prevents mixing. The nature of this mechanism is not known, but it clearly depends on the polarity determinants. In the absence of the aPKC complex, the baso-lateral determinants spread into the former apical domain.
T-type and R-type voltage-gated calcium channels have been found in basal dendrites, and it is thought that the activation of these channels during action potential bursts leads to the generation of dendritic calcium spikes. [10] T-type and R-type channels are all part of the alpha 1 subunit class of calcium channels.