THE TEENAGE BRAIN

This book competently covers the details of adolescent brain development but offers few surprises and scant advice.

It’s not really news that the brain continues to develop well into the early 20s. Scholars and journalists have long written about the “unfinished” nature of the teen brain. Here to clarify exactly what that means is Jensen (Neurology/Univ. of Pennsylvania), the mother of two boys who have survived those fraught years between childhood and full adulthood. While the author shares a few stories about her sons’ teen years, this is not a book of anecdotes. Instead, Jensen, with the assistance of Pulitzer Prize–winning Washington Post writer Nutt (Shadows Bright as Glass: The Remarkable Story of One Man's Journey from Brain Trauma to Artistic Triumph, 2011), lays out the way human brains develop: “back to front” with the impulse-controlling, executive-functioning circuits of the frontal lobe coming in last. If you ever doubted that this was true, the author’s collection of study results will convince you. Meticulously documented and reported, the studies offer proof that it’s not just parents who think their teenagers don’t quite have it all together. Jensen ably explains neurons, synapses, neurotransmitters and so on, offering a vocabulary that provides scaffolding for understanding how the brain grows. The prevalence of medical terminology may engage some readers, but it could easily put off parents who pick up the book based on its subtitle. Individual chapters expound on the biology behind the many perils of the teen years—why it’s such a prime time for getting hooked on drugs and what those drugs do to a developing brain, for instance—but parents looking for guidance on avoiding these pitfalls will be disappointed. Parents and teens may balk at the heavily risk-oriented perspective Jensen takes throughout, which gives regrettably short shrift to the more positive flip side of the teen scene: extraordinary creativity, energy and learning capacity.

More at home in college classrooms than on parents' nightstands.