Spindle fibers are protein structures that form early in mitosis, or cell division. They consist of microtubules that originate from the centrioles, two wheel-shaped bodies located in the centromere area of the cell. The centromere is also known as the microtubule organizing center.
1 Night terrors are characterized by frequent recurrent episodes of intense crying and fear during sleep, with difficulty arousing the child. Night terrors are frightening episodes that disrupt family life.  A small percentage of children experience night terrors.
If your toddler's night terrors usually happen at a particular time, try gently waking him about 15 minutes beforehand. This will take him out of the deep sleep phase where night terrors happen. If you do this every night for a week, it may reset his sleeping pattern enough to prevent the night terrors (NHS 2013) .hen your toddler's having a night terror, you'll probably see one or more of the signs below. He may: Yes. Unlike night terrors, nightmares happen during rapid eye movement (REM) sleep, otherwise known as dream sleep (Knott 2011) .