The newest neuron has been named the "rosehip neuron," thanks to its bushy appearance. The brain cell, with its unique genes, distinctive shape and diverse connections with other neurons, has not been described before and, what's more, it isn't present in neuroscientists' favorite subject: mice.... Also adding to the rosehip appearance are the large bulbs at the end of their axons that release neurotransmitters or chemical signals to other neurons, Bakken added. … One reason rosehip neurons eluded neuroscientists for so long is likely because the cells are so rare in the brain, Bakken said. Another reason, he added, is...