Final answer:
Schizophrenia is the mental disorder characterized by hallucinations, delusions, and purposeless movements, involving problems with dopaminergic neurons and glutamate signaling.
Step-by-step explanation:
The mental disorder that includes symptoms such as hallucinations, delusions, and making purposeless movements is schizophrenia. People with schizophrenia experience difficulty differentiating between reality and their imagination, and they often have inappropriate emotional responses and problems in social situations. Interestingly, the development of schizophrenia may involve issues with dopaminergic neurons and could also be influenced by glutamate signaling.
In terms of treatment, antipsychotic medications are commonly used, which block dopamine receptors to regulate neurotransmission. However, these medications are not a cure and many individuals with schizophrenia will require ongoing medication.