When the cell is "ready" to divide, the centrosome separates and moves to opposite sides, the chromosomes line up in the middle and then split evenly; then some thing nips in the .
Impaired cell division leads to neuronal disorder Researchers have discovered an amino acid signal essential for error-free cell division. This signal regulates the number of centrosomes in the cell, and its absence results in the development of pathologically altered cells. Remarkably, such altered cells are found in people with a neurodevelopmental disorder, called autosomal recessive primary microcephaly.
Jan. 31, 2014 - Science Daily