Unit 2: Bological Bases Of Behavior Part 2

Question 1

Measures electrical activity of the neuron below the electrodes place on the scalp, often used to show brain wave patterns of electrical activity during sleep stages and seizures
Purpose: function

Advantage: noninvasive, on normal pattern indicate neurological disorders

Disadvantage: difficult to determine the specific brain area the electrical activity is produced

Answer 1

EEG

Question 2

Involves the injection of small harmless amount of radioactive material, into the blood stream, indicates area of of the brain activity during cognitive tasks by tracking the specific structures using the radioactive material as fuel resulting in a color coded image

Purpose: function

Advantage: investigation of mental illness and neurological problems like Alzheimer’s and epilepsy,

Disadvantage: exposure to low levels of radioactive material, difficult to pinpoint the exact location of brain activity

Answer 2

PET

Question 3

Temporarily creates advanced and specific x ray of the brain, th tube rotates around the body taking x rays, often used to locate timers and brain damage resulting from blood clots and strokes
Purpose: structure

Advantage: can view large abnormalities, and more sensitive than traditional x rays

Disadvantage: involves radiation, incapable of locating small brain abnormalities

Answer 3

CT scan (CAT)

Question 4

Uses strong magnetic fields that cause different molecules to vibrate at different frequencies which produce detailed images of slices of brain tissue

Purpose: structure

Advantage: generates images of Bria structure with greater clarity than the CT scan, no exposure to radiation

Disadvantage: can’t be used on an individual with metallic implant
Individual is required to stay for an exter period of time in a confined space

Answer 4

MRI

Question 5

Uses magnetic field to produce images of brain and tracks real time Brian activity by measuring blood flow carrying oxygen to active brain tissue

Purpose: structure and function

Advantage: no exposure to radioactive materials, allowing multiple scans on an individual, ability to pinpoint and track mental processes that occur over seconds by thinking about an object

Disadvantage: cannot be used in an individual with metallic implant
Long term exposure to powerful magnets is unknown

Answer 5

fMRI

Question 6

Conscious level: thoughts,perceptions

Preconscious level: memories, stored knowledge

Unconscious level: feels, immoral urges, violent motives

Answer 6

The mental iceberg by Freud