Patients suffering from PTSD can be prone to states of dissociation lasting for hours or even days.
They also experience nightmares and intrusive memories of real-life experiences. Intrusive memories do not require triggers to occur. Hallucinations are not likely although flashbacks can occur. Dreamless sleep states are likely to occur but are not specific to PTSD.

The WCST is a neuropsychological test designed to assess executive functions, such as problem-solving, mental flexibility, and cognitive shifting. It is often used to diagnose and evaluate the severity of executive functioning deficits in patients with various psychiatric and neurological disorders.
The TMT assesses visual attention, cognitive flexibility, and processing speed. In contrast, the Stroop Color and Word Test assesses cognitive control and response inhibition. The WAIS is a comprehensive measure of intelligence that assesses various cognitive domains and is not specifically focused on executive functions to the extent that the WCST is.

Extrapyramidal symptoms are drug-induced side effects that affect motor functioning and muscle movement. Typical antipsychotics like haloperidol, perphenazine, and chlorpromazine are more likely to cause these side effects than atypical antipsychotics like olanzapine, lurasidone, and risperidone. The common types of extrapyramidal symptoms are listed below:
* Akathisia: motor restlessness, inability to remain still, rocking, pacing, or constant motion of a unilateral limb, subjective sense of restlessness, often mistaken for increasing anxiety
* Akinesia: absence of movement, difficulty initiating motion, subjective feeling of lack of motivation to move, often mistaken for laziness or lack of interest
* Dystonia: muscle spasticity usually in the back or neck, subjectively painful, often mistaken for agitation
* Pseudo-Parkinson's: shuffling gait, motor slowing, mask-like facial expression, pill-rolling, tremors, muscle rigidity
* Tardive dyskinesia: involuntary abnormal muscle movement of the mouth, tongue, face, and jaw that may progress to limbs; can be irreversible or occur as an acute process at the initiation of medications or as a chronic condition at any point during treatment

The term "incidence rate" is crucial in the field of epidemiology, particularly when discussing psychiatric disorders. It specifically refers to the number of new cases of a disorder that appear in a population during a defined time frame. This measurement is vital for understanding how a disease is spreading within a community and can help in planning public health strategies and interventions to address the disorder.
To further clarify, the incidence rate is different from the "prevalence rate," which measures all cases (both new and existing) of a disorder present in a population at a specific point in time. While incidence provides insights into the risk of contracting the disorder, prevalence offers data on how widespread the disorder is.
Epidemiology, the science that underpins these terms, focuses on the study of how often diseases occur in different groups of people and why. It provides essential information that helps health professionals prevent and control health problems. Incidence and prevalence rates are fundamental concepts in this field, aiding epidemiologists in understanding the dynamics of disease transmission and burden within populations.
In summary, the incidence rate is a measure of new occurrences of a disease or disorder in a specified period, crucial for evaluating the emerging risks and the effectiveness of interventions aimed at reducing these risks. It is a dynamic indicator that can signal changes in both the environment and public health practices.

There are two overarching elements of a complete psychiatric interview. The patient history is the patient's subjective report of their experience and may include collateral information from caregivers and other healthcare providers. The mental status exam is the examiner's objective tool for assessment.
A physical exam is an important part of the overall assessment process to rule out comorbid or contributing medical conditions, but it is not a part of the psychiatric interview. A history of current illness and past medical history are included in the patient's history.