Brain Develpment

ÞRain DEVELOPMENT THERE ARE OVER 100 BILLION NEURONS IN YOUR BRAIN.. AND EACH NEURON CONNECTS TO ABOUT 10,000 OTHER NEURONS WELL, IT ALL STARTS WHEN YOU'RE ABOUT 4 WEEKS OLD... HOW DOES SUCH A COMPLEX NETWORK DEVELOP? THAT'S A QUADRILLION CONNECTIONS, OR 1,000,000,000,000,000! (THE SAME NUMBER AS THERE ARE STARS IN THE MILKY WAY GALAXY) (THE SAME NUMBER OF CELLS YOU HAVE IN YOUR ENTIRE BODY) YOU. y DWAYNE GODWIN AND JORGE CHAM NEW NEURONS ARE MADE IN AN AREA .AND THEN TRAVEL OUTWARDS BY DEEP INSIDE THE GROWING BRAIN A NARROW GROOVE BEGINS TO FORM ON YOUR NASCENT GROUP OF CELLS, GIVING THE FIRST HINT OF A NERVOUS SYSTEM: THE GROOVE THEN FOLDS UNTO ITSELF, FORMING WHAT IS CALLED THE NEURAL TUBE, THE TUBE THEN GOUEEZES IN VARIOUS SECTONS TO FORM THE DIFFERENT PARTS OF THE BRAIN AND THE SPINAL CORD: THEY EVENTUALLY SETTLE NTO SIX CLIMBING ALONG CELLULAR "ROPES" DISTINCT LAYERS OF NEURONS THAT MAKE UP YOUR BRAIN CORTEX. CALLED THE VENTRICULAR ZONE. CALLED BERGMANN GLIA". HINDBRAIN FOREBRAIN Inipr MIDBRAIN IT NOT ONLY DISRUPTS THE GENES INVOLVED IN DEVELOPMENT, BUT ALSO AFFECTS THE CHEMICALS THAT TRANGMIT SIGNALS BETWEEN NEURONS. BUT ITS NOT ALL GENETIC. ONCE IN PLACE, NEURONS REACH OUT TO EACH OTHER BY EXTENDING TENTACLE-LIKE "GROWTH CONES". SYNCHRONIZED ACTIVATION OF TWO NEURONS RENFORCES THEIR CONNECTION.. THIS IS WHY ALCOHOL IS SO HARMFUL TO DEVELOPING BRAINS. WHICH ARE GUDED BY CHEMICAL CUES THAT LURE AND REPEL THEM TOWARDS RECEPTORS IN OTHER NEURONS. NEURON CONNECTIONS ARE ALSO DETERMINED BY ACTIVITY PATTERNS, WHICH IS WHAT MAKES EACH BRAIN SO UNIQUE, ..WHEREAS LACK OF USE TENDS TO DISCOURAGE CONNECTIONS. EVEN AFTER BIRTH, OUR BRAINS ARE STLL IN THE PROCESS OF WIRING THEMSELVES AND CAN BE INFLUENCED BY THE WORLD AROUND US. FOR EXAMPLE, CATS RAISED IN AN ENVIRONMENT OF VERTICAL STRIPES. FOR EXAMPLE, THE FRONTAL LOBES (WHERE JUDGEMENT AND DECISION- MAKING HAPPENS) ARE STILL IN DEVEL- OPMENT DURING OUR TEENAGE YEARS.. YOU MIGHT NOT FEEL ANY SMARTER, BUT YOUR BRAIN IS STILL GROWING AND REARRANGING ITSELF, EVEN AS AN ADULT (THOUGH NOT AS FAST AS IN THE WOMB) ALSO, DIFFERENT PARTS OF THE BRAIN DEVELOP .WHICH MIGHT EXPLAIN A LOT. ...LATER HAVE TROUBLE SEEING HORIZONTAL STRIPES! AT DIFFERENT RATES. WHAT WERE YOU WEARING!? )) SO REMEMBER TO MAINTAIN AN ELEMENT OF SURPRISE AND WONDER ABOUT THE WORLD AROUND YOU. YOUR BRAIN NEEDS IT! SEX THE TEENAGE BRAIN WHATEV HIGH SCHOO YEAR BOOK STUFF