Describe how phantom limb sensations that seemingly come from a missing hand might occur when the face is touched
What will be an ideal response?
The area of the cortex that normally responds to the face can send collateral sprouts to the adjacent area of the cortex that was innervated by the hand. Investigators recorded from the cerebral cortices of monkeys whose sensory nerves from one forelimb had been cut 12 years previously. They found that the stretch of cortex previously responsive to the limb was now responsive to the face (Pons et al., 1991). After loss of sensory input from the forelimb, the axons representing the forelimb degenerated, leaving vacant synaptic sites at several levels of the CNS. Evidently, axons representing the face sprouted into those sites in the spinal cord, brain stem, and thalamus (Florence & Kaas, 1995; E. G. Jones & Pons, 1998). Or perhaps axons from the face were already present but became stronger through denervation supersensitivity. Brain scan studies confirm that the same processes occur with humans. Later studies showed that this process can be much quicker than 12 years
You might also like to view...
Which of the following refers to the tendency for individuals to underestimate the commonality of desirable traits and to overestimate their uniqueness?
a) The trait desirability tendency b) The false attribution effect c) The trait reversal effect d) The false uniqueness effect
Which child is most likely to retain the benefits of watching prosocial television programming?
a. Ruth, who watches many hours of television by herself, but all of it is prosocial b. Jael, who watches lots of television, some of it prosocial, with his parents c. Riley, who watches a bit of prosocial programming and then acts it out with his mom d. Alec, who watches a lot of prosocial programming while his dad watches with him
Ursula develops the German measles during the 3rd week of pregnancy, a condition that is also called ________. As a result, her child is at risk for blindness, deafness, intellectual disability, and other symptoms.
A. toxoplasmosis B. the measles C. shigellosis D. rubella
How does Mosby operate?
What will be an ideal response?