6.2C Studying the BrainA. MRI: Magnetic Resonance

Imaging• Passing non-harmful radio

waves thru the brain which gives a highly detailed image of the brain’s structure

Studying the Brain (cont)

MRI: a real brain image

Studying the Brain (cont)

MRI: a real brain image

#2

Studying the Brain (cont)B. PET scan: Positron Emission

Topography• Injecting radioactive solutions

into blood and measuring the amount of radiation brain cells absorb.

• Computers then analyze the data, transforming activity level to various colors

Studying the Brain (cont)

PET scan: a real brain image

Computerized Axial Tomography (CT)• CT- an imaging

technique used to study the brain to pinpoint injuries and brain deterioration

• Radiation is absorbed in different amounts depending on the density of the brain tissue. Computers measure and transform into a three dimensional view of the brain.

Electroencephalograph (EEG)• EEG- a machine

used to record the electrical activity of large portions of the brain.

6.4 Heredity and Environment

1.) Body Build2.) Intelligence3.) Personality4.) Mathematical ability

5.) Baldness6.) Handedness7.) Height8.) Musical ability9.) Longevity

• John Watson, the founder of behaviorism, wrote in 1930: Give me a dozen healthy infants, well-formed, and my own specified world to bring them up and I’ll guarantee to turn him into any specialist-doctor, lawyer, artist etc.

• Sir Francis Galton published Heredity Genius in 1869: after studying the families of over 1000 successful families he concluded that success ran in families and heredity was the cause.

Nature vs. Nurture

• Heredity: the genetic transmission of characteristics from parents to their offspring.

• Identical Twins: twins who come from one fertilized egg; twins having the same heredity.

• Genes: the basic building blocks of heredity.• Fraternal Twins: twins who come from two

different eggs fertilized by two different sperm.