I am sorry but I do not have any specific physician referrals for your brother. My general recommendation is to have him evaluated by multiple psychiatrists and neurologists. I am suggesting that you consider neurologists because of the nature of your brother’s symptoms.
Some of his symptoms may be characteristic of schizophrenia, including talking to himself, unresponsiveness and emotional instability. Others may not be characteristic of schizophrenia, including yelling obscenities and doing so in public. The latter symptoms may be more characteristic of Tourette syndrome. Tourette syndrome is a nervous system disorder that often begins in childhood between the ages of seven and 10 years old. It affects males at a higher rate than females. Characteristics of this syndrome include repetitive, involuntary movements and vocalizations, called tics. It is possible that your brother is experiencing tics and cannot control his behavior.
Alternatively, it may be that his involuntary symptoms are related to schizophrenia or they are side effects of his psychiatric medication. Having so little information makes it difficult to discern the cause. That is why it is important that he’s evaluated by multiple types of specialists. I would recommend speaking to his current prescribing physician about a referral or several referrals to highly trained specialists.
I would also recommend conducting Internet research regarding the best specialists in the New York area. You may want to start at the Columbia University Medical Center website which can be located here. Their psychiatry department offers a toll-free referral line. That may be a good place to start.
Another good resource may be The National Alliance For Mental Illness in New York. They too offer a helpline and Internet resources that may be of assistance to you. Their website is located here.
I am sorry that your brother and your family are experiencing such distress. It is difficult to watch a loved one suffer. It can be a helpless feeling. Your brother is fortunate to have a loving and caring family who are concerned about his well-being. I sincerely hope that you can find the proper help for your brother. Please take care. Best of luck to you and your family.