Final answer:
Psychotropic medications can cause side effects such as uncontrollable hand movements and excessive blinking of the eyes. In the case of haloperidol, which was mentioned in the reference, these side effects are likely due to changes in motor control. The regions of the nervous system affected by haloperidol side effects include the basal ganglia and related pathways.
Step-by-step explanation:
The side effects of psychotropic medications, such as uncontrollable hand movements and excessive blinking of the eyes, are likely due to the medication's impact on the nervous system. Specifically, these side effects are thought to be caused by changes in motor control.
In the case of the elderly woman mentioned in the given reference, the medication haloperidol was identified as the cause of her loss of fine motor control. Haloperidol is a neuroleptic drug that affects various regions of the nervous system, including those responsible for motor function.
Therefore, the regions of the nervous system likely to be the focus of haloperidol side effects are those involved in motor control, such as the basal ganglia and related pathways.