Structural neuroimaging is primarily used to identify what in brain studies?

Structural neuroimaging is geared towards providing detailed images of the brain's physical structure, primarily focusing on identifying tissue abnormalities. Techniques like MRI (Magnetic Resonance Imaging) and CT (Computed Tomography) scans play a crucial role in diagnosing conditions such as tumors, brain injuries, or structural anomalies associated with various neurological disorders.

In contrast, identifying functional activity levels (as seen with functional MRI or PET scans) or measuring electrical impulses (usually monitored through EEG) falls under the domain of functional neuroimaging. Psychiatric symptoms are typically assessed through behavioral observations and psychological evaluations rather than direct imaging techniques. Hence, when considering the key purpose of structural neuroimaging, recognizing and assessing tissue abnormalities is the primary focus, reinforcing why this answer is definitive.