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NAME_________________DATE______BLOCK____ Brain Development PPT The beginning of the brain can be traced to the period of the__________________. Approx. 3 weeks after conception, groups of cells form a flat structure called the __________________. The neural plate folds to form a tube that ultimately becomes the __________ and ________________. Early Brain Development In the months after birth the brain grows rapidly, producing billions of neurons, dendrites and axons, as well as synapses reaching its peak around the infant’s first birthday. In the first 2 years, the brain increases in size from ______ to _____ of its adult weight. Soon after, synapses soon to gradually disappear a phenomenon known as _______________________. This process is the brain’s way of “_________________________” the unnecessary connections between neurons. Brain growth and development There is a fivefold increase in the number of dendrites in cortex from birth to age 2 years, as a result approximately ___________________ new connections may be established per neuron. This is called “___________________________” These connections are necessary because ____________ and ______________ require many connections between many parts of the brain. ______________________ is vital for brain formation. If cells are unused they _____________ and are rededicated to other senses. Underused neurons, like synapses are inactivated by _______________ process . When children suffer brain damage, cognitive processes are usually _____________________; these processes often improve gradually showing the brain’s __________________. The brain’s organization is somewhat ______________ and if damaged the brain can make new connections.