Electrical stimulation of the ______________ is as potent as a ...

[RRMR]

Electrical stimulation of the ______________ is as potent as a large dose of morphine.
 
  a. periaqueductal gray
  b. medulla
  c. secondary somatosensory cortex
  d. reticular formation
  e. anterior cingulate cortex

Question 2

Melzak argues that phantom limb sensation in an amputee occurs because
 
  a. spinal cord axons continue to spontaneously fire after being detached from a limb.
  b. sensory neurons in the thalamus show spontaneous firing, which is interpreted by the brain as a signal from the missing limb.
  c. the parietal cortex is programmed to perceive activity from each of four limbs.
  d. the frontal cortex is programmed to perceive activity from each of four limbs.
  e. sensory neurons in the spinal cord show spontaneous activity.

[chem1s3]

Answer to Question 1

Answer: a. periaqueductal gray

Answer to Question 2

Answer: c. the parietal cortex is programmed to perceive activity from each of four limbs.

[RRMR]

Wow, this really help

[mochi09]

TYSM