Substance-Related and Neurocognitive Disorders
Substance-related disorders involve the use and abuse of substances like alcohol, cannabis, stimulants, or tobacco. These disorders can lead to conditions including intoxication, withdrawal, psychosis, anxiety, and delirium.
People with substance use disorders typically experience cravings, difficulty controlling use, and continued use despite negative consequences in their lives. Alcohol-related disorders are particularly common, as alcohol is the most widely used and frequently overused drug in the United States.
Interestingly, the DSM-5 includes Gambling Disorder in this category because gambling activates the brain's reward system similarly to drugs of abuse, and gambling disorder symptoms resemble substance use disorders.
Neurocognitive disorders involve acquired deficits in cognitive function that weren't present at birth or early in life. Delirium develops over a short period (hours or days) and involves disturbances in attention and awareness.
Major and mild neurocognitive disorders feature acquired cognitive decline in areas like memory, attention, language, and learning. These can be caused by conditions like Alzheimer's disease, Parkinson's disease, HIV infection, or vascular disease.
Understanding schizophrenia: Schizophrenia affects about 1% of Americans and typically begins in the late teens or early twenties, with men usually showing symptoms earlier than women. While there's no cure, treatments combining medications, therapy, and support can help manage symptoms.
For a schizophrenia diagnosis, a person must show at least two symptoms for one month, with one being delusions, hallucinations, or disorganized speech.