Phantom limb sensations reflect not only the reorganization of somatosensory cortex,but also patients' memory for sensations they experienced prior to the removal of the body part.The contribution of cortical reorganization to phantom limb sensations exemplifies a ___ influence.The contribution of memory exemplifies a ___.
A) top-down; top-down influence also
B) top-down; bottom-up influence
C) bottom-up; bottom-up influence also
D) bottom-up; top-down influence

Question

Quizplus · Accepted Answer

The contribution of cortical reorganization to phantom limb sensations exemplifies a bottom-up influence because it is based on changes in sensory processing due to the loss of a body part. The contribution of memory exemplifies a top-down influence because it is based on higher-level cognitive processes, such as recalling prior sensory experiences. Therefore, the best choice is D, which describes cortical reorganization as a bottom-up influence and memory as a top-down influence.

Phantom Limb Sensations Reflect Not Only the Reorganization of Somatosensory