Module 3.3 // Module 4.1

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How does the method of transcranial magnetic stimulation of brain areas differ from magnetic inactivation?

Brain activation results from mild, brief magnetic stimulation.

Sex-linked genes are usually found on the Y chromosome. T/F

False

Genes become more prevalent in a population if they contribute to reproductive success. T/F

True

To determine the contributions of heredity and environment, researchers rely mainly on studies of monozygotic and dizygotic twins. T/F

True

Which technique is dependent upon the release of oxygen from hemoglobin molecules?

fMRI

A stereotaxic instrument would most likely be used for ____.

placing an electrode in the brain

Women on the average have a greater density of neurons in part of the ____.

temporal lobe

An electroencephalograph measures ____.

the average activity of the cells in a given region of the brain

Computerized axial tomography creates an image from ____.

x-rays

Evoked potentials in the brain are most likely to be detected by a(n) ____.

EEG

Which method is dependent upon injecting a radioactive chemical into the blood to measure blood flow?

PET

Thus far, it appears that the brain feature most strongly correlated with IQ in humans is the ____.

amount of gray matter

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