1 Psych on The Brain. 2 How well do you know your Brain?

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  • Psych on The Brain*

  • How well do you know your Brain?*

  • Aoccrdrinig to rscheearch at Cmabridge Uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are, the olny iprmoetnt tihng is taht the frist and lsat ltteer be at the rghit pclae. The rset can be ttaol mses and you can sitll raed it wouthit porbelm. Tihs is bcuseae the huamn mnid deos not raed ervey lteter by istlef, but the wrod as a wlohe.

  • A Little Quiz(no, it doesnt count)*

  • When are your last brain cells born?A) Before BirthB)At age SixC)Between the ages of Eighteen and twenty-threeD) In old Age*

  • Which of the following is NOT likely to improve brain function in old age?A) Eating fish with omega-3 fatty acidsB)Getting regular exerciseC)Drinking one or two glasses of red wine/dayD) Drinking a whole bottle of red wine/day*

  • Which of the following strategies is the best one for overcoming jet lag?A) Taking melatonin the night after you arrive at your destinationB)Avoiding daylight for several daysC)Getting sunlight in the afternoon at your destinationD) Sleeping with the light on*

  • Your brain uses about as much energy as a A)refrigerator light.B)laptop computer.C)idling car.D)car moving down a highway.*

  • Someone is tickling you. You can reduce the sensation by

    A)putting your hand on his to follow the movementB)biting your knucklesC)tickling him backD)drinking a glass of water*

  • Which of the following activities is likely to improve your performance in school?A) Listening to classical music while you sleepB)Listening to classical music while you studyC)Learning a musical instrumentD)Taking breaks from studying to play video gamesE)Both C and D*

  • Which of the following things is a blow to the head least likely to cause?A) Loss of consciousnessB)Memory lossC)Restoration of memory after suffering amnesiaD)Personality Change*

  • You are in a noisy room talking to a friend on a cell phoneTo have a clearer conversation you should:

    A) talk more loudly.B)cover one ear & listen thru the other.C)cover your ear when you talk.D)cover the mouthpiece when you listen.*

  • Which of the following is the hardest thing your brain does?A)Doing Long DivisionB)Looking at a photographC)Playing ChessD)Sleeping*

  • Memory starts to get worse in which decade of life?A)ThirtiesB)FortiesC)FiftiesD)Sixties*

  • How much of your brain do you use?A)10%B)5% when sleeping, 20% awakeC)100%D) Varies according to intelligence*

  • Brain FactsThe adult human brain weighs about 3 lbs.The adult human brain has about 100 BILLION (!) neurons, 20 times more than the world populationEarly in pregnancy, a babys neurons multiply at about 250,000 per minute (!)There are 1,000 to 10,000 synapses per neuron in a typical adult human brain*

  • More brain factsThe best estimates of the speed of neural transmission range from 6 to 122 meters per second (100 meters per second equals about 224 miles per hour)

    Nearly half the weight of the brain comes from glial cells (think glue cells), which help support the neurons that send messages and outnumber them about 10 to 1*

  • More brain stuffSome neurons release excitatory neurotransmitters, which are analagous to the gas pedal on a carOther neurons release inhibitory neurotransmitters, which act like the brakes on a car *

  • The Cerebral CortexThe cortex is the wrinkled, outer covering of the brain, often likened to the bark of a treeIf the human cortex was flattened out, it would be equal to about 4 sheets of paper*

  • Relative Cortex SizesA chimpanzees cortex = one sheet of paper

    A monkeys cortex = a postcard

    A rats cortex = a postage stamp*

  • The Lobes of the CortexWe divide the cortex into four sections, or lobes:The frontal lobesThe parietal lobeThe occipital lobeThe temporal lobe*

  • The Frontal LobeOne Third of the Cerebral cortexSeveral Primary functions:Planning aheadPredictionProgramming for ones needsJudgement, understanding consequencesAnalytical and critical reasoningCognition and memoryvoluntary motor activitystores language skills*

  • More on the CortexSome estimate that as much as 75% of the cortical area is given over to the association cortex (its not very easily localized in any one spot), which makes connections etc.Damage to association areas in the frontal lobes can prevent a person from fleeing danger even though they know they should flee!*

  • The Lobes of the Cortex (continuedThe occipital lobes: at the rear of the head; houses the visual cortexThe temporal lobes: at the temple, on the side of the head; houses the auditory cortex, smell is housed here


  • The Parietal LobeAn area that responds to nerve impulses for:

    PainTemperatureTouchPressureLeft-right orientation*

  • Occipital Lobe

    Visual Information processed here

    Damage to this area can cause partial or complete blindness*

  • Temporal LobeUpper section of it affects hearingInner surface concerns memory processing*

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  • The Limbic SystemSometimes called the emotional brainIncludes:thalamushypothalamusamygdalahippocampus*

  • ThalamusLast Stop for neurons firing info to cerebral cortexA kind of relay center for sensory inputRelated to sleep and wakefulness*

  • HypothalamusRelated to Homeostasis

    Links nervous system to the endocrine system - related to pituitary glandHormone production and regulation affecting emotional behavior, including anger, stress, and sexAlso blood pressure, heart rate, thirst, hunger, circadian rhythms, and other maintenance functions *

  • AmygdalaNamed because of its almond shapeRelays info to hypothalamusInvolved in storage of emotional memories, particularly negative ones*

  • Amygdala IssuesOver reaction,Hyper emotionalityHyper sexualityMonkey mothers damaged amygdalas were abusiveBorderline personality disorderMisinterpretation of facial expressions in depressed patients*

  • HippocampusInvolved in long-term memory (first damaged in AlzheimersUsed to access facts stored in memoryRelated to inhibitionsAlso involved in spatial navigation *

  • Brain differences thinking about finances


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