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Related Concept Videos

Determination01:51

Determination

During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In contrast, determination...
Nervous Tissue: Neuron Types01:19

Nervous Tissue: Neuron Types

Neurons, the fundamental units of the nervous system, can be classified based on both their structural and functional characteristics.
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...

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Homochronic Transplantation of Interneuron Precursors into Early Postnatal Mouse Brains
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Published on: June 8, 2018

Birth time/order-dependent neuron type specification.

Chih-Fei Kao1, Tzumin Lee

  • 1Department of Neurobiology, University of Massachusetts Medical School, Worcester, MA 01605, USA.

Current Opinion in Neurobiology
|December 1, 2009
PubMed
Summary
This summary is machine-generated.

Neurons develop distinct fates based on their birth timing. Advanced genetic tools reveal these temporal patterns, uncovering the genetics of neuronal temporal identity in model organisms.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Genetics

Background:

  • Neurons originating from the same progenitor cell can differentiate into various types.
  • Cell fate determination is influenced by the timing or order of cell division.
  • Understanding temporal control is crucial for deciphering neuronal development.

Purpose of the Study:

  • To investigate how the timing of neuron production influences cell fate.
  • To explore the lineage relationships and birth times of neurons.
  • To understand the genetic basis of temporally guided neuronal identity.

Main Methods:

  • Utilizing high-resolution genetic lineage analysis to track individual neurons.
  • Employing fate mapping techniques in model organisms like Drosophila and mice.
  • Analyzing the temporal patterns of neuron production from precursor cells.

Main Results:

  • Demonstrated abrupt temporal identity changes in diverse Drosophila neuronal lineages.
  • Revealed specific temporal patterns in the production of neuron types from common precursors in mice.
  • Highlighted the utility of advanced genetic tools in dissecting neuronal development.

Conclusions:

  • Neuron birth timing is a key determinant of cell fate.
  • Genetic lineage analysis and fate mapping are powerful tools for studying temporal cell fate.
  • These methods advance the understanding of the genetics underlying neuronal temporal identity.