Teacher:Given a passage and a query based on the passage, generate an unambiguous, concise and simple answer to the query from information in the passage. Note that the answer may not be present in exact form.
Teacher: Now, understand the problem? Solve this instance: Highlights of Human brain development from conception through adulthood. Studies report that three primary structures are formed in the sixth gestational week. These are the forebrain, the midbrain, and the hindbrain, also known as the prosencephalon, mesencephalon, and the rhombencephalon respectively. Five secondary structures from these in the seventh gestational week. Worse, teens' brains make them much more vulnerable to becoming addicted than a fully developed adult brain. The part of the teen brain not yet fully developed is the frontal lobe, which is the part of the brain that manages impulse control, judgment, insight, and emotional control. So when teens engage in risky and/or foolish behavior, it's not just that they don't have life experience to know better, but that their brains have difficulty assessing consequences. Brain diagram. Credit: dwp.gov.uk. (PhysOrg.com) -- New research from the UK shows the brain continues to develop after childhood and puberty, and is not fully developed until people are well into their 30s and 40s. The findings contradict current theories that the brain matures much earlier. When we think about brain development and plasticity, most of us think about the birth and death of neurons or changes in the number or strength of synapses. Yet, no part of the brain works in isolation. Brain maturation and plasticity also depends upon the large nerve fiber tracts that connect different brain regions together. The limitations of the teen brain has been well publicized in the mass media, helping parents, teachers, and others understand why it may be difficult for teens to meet our expectations and demands for managing emotions, handling risks, responding to relationships, and engaging in complex school work or employment. The results are consistent with other research suggesting that the human brain continues to grow and mature right up to the point when we become adults and even beyond. In another study, researchers found that humans don't really develop the ability to handle multiple pieces of information at once until about the ages of 16 or 17. In a recent paper in the Journal of Neuroscience (link is external), investigators described a study in which they monitored white matter changes in 103 healthy human subjects, ages 5 to 32 years. For each subject, they imaged the brain at least twice with an average period of four years between scans. Some tracts, such as sections of the corpus callosum, appeared to reach maturity during adolescence, but, in about 50 % of the older subjects, the association fiber tracts continued to mature. Brain changes significantly after age 18, says Dartmouth research. Dartmouth College Office of Public Affairs Press Release. Posted 02/06/06 Contact Susan Knapp (603) 646-3661. Two Dartmouth researchers are one step closer to defining exactly when human maturity sets in. In a study aimed at identifying how and when a person's brain reaches adulthood, the scientists have learned that, anatomically, significant changes in brain structure continue after age 18. A fetus is a stage in the prenatal development of viviparous organisms. In human development, a fetus or foetus (/fits/; plural fetuses or foetuses) is a prenatal human between the embryonic state and birth. The fetal stage of development tends to be taken as beginning at the gestational age of eleven weeks, i.e. nine weeks after fertilization. A control group of 17 older students, ranging in age from 25 to 35, were also studied for comparison. The results indicate that significant changes took place in the brains of these individuals. The changes were localized to regions of the brain known to integrate emotion and cognition. Query: at what age is the human brain fully formed
Student:
Brain is not fully developed until people are well into their 30s and 40s.