Final answer:
Junko's grandmother's paralysis on her left side suggests she has damage to her right hemisphere, which controls movement on the left side of the body. Damage to the right hemisphere can affect motor functions and, depending on the region, behavior. The left hemisphere commonly handles language functions and communicates with the right hemisphere through the corpus callosum.
Step-by-step explanation:
Junko's grandmother has likely suffered damage to her right hemisphere. This inference is based on the fact that there is paralysis on the left side of her body. In most individuals, each hemisphere of the cerebral cortex controls the opposite side of the body, with the left hemisphere largely controlling movement on the right side and the right hemisphere controlling movement on the left side. Therefore, damage to the right hemisphere can lead to motor control issues on the left side, as in the case of Theona, who suffered a stroke in the right hemisphere and experienced difficulty moving her left leg.
It is also important to note that language function is typically localized to the left hemisphere in the majority of people. Furthermore, the two hemispheres communicate through the corpus callosum, allowing for coordinated functions. Thus, damage to the right cerebral hemisphere can affect motor functions and potentially some aspects of behavior, depending on the specific regions and extent of the damage.
On the subject of cerebellum involvement, it is responsible for balance, coordination, movement, and some types of memory but not for controlling movement on the opposite side of the body.