How does an MRI allow the exploration of "inner space" without the injection of chemicals?
What will be an ideal response?
A good answer will include the following key points:
• Magnetic resonance imaging (MRI) uses powerful magnetic fields and radio frequencies to take highly detailed pictures of the brain.
• The magnets produce vibrations in the nuclei of atoms in the body's organs.
• The vibrations are then detected as signals by special receivers.
• A computer analyzes the signals, taking into account their strength and duration, and converts them into a high-contrast picture of whatever organ the scientist or physician is interested in, such as the brain.
• This is a structural MRI; it gives us a terrific picture of what the brain
• looks like, but not what it does.
You might also like to view...
How does hospice care differ from hospital care for a dying patient?
A. The family is in charge of making many decisions for the patient. B. The focus is on the patient and the family. C. Physicians are not part of the hospice team. D. The focus is on psychological well-being not pain management.
Each evening before going to bed, Rachel tightens all the muscles in her feet, then voluntarily relaxes them. Then she tightens all the muscles in her legs, then voluntarily relaxes them. She does this all the way to her head. Rachel is practicing the technique of
a. stress inoculation. b. progressive relaxation. c. guided imagery. d. meditation.
Rogers and Maslow take the view that behavior is directed toward:
a. self-actualization b. aversive states c. situational factors d. unconscious forces
Which of the following is the correct endocrine gland and hormone pairing?
a. pineal gland-----melatonin b. pituitary---------epinephrine c. adrenal gland---human growth hormone d. thyroid-----------norepinephrine