How is "mental injury" defined under Maryland law?

The definition of "mental injury" under Maryland law specifically focuses on observable impairments to a child's ability to function. This aligns with the emphasis on not just the presence of emotional distress but rather the tangible impact that such emotional distress has on the child's day-to-day functioning.

In the context of Maryland law, a mental injury must be significant enough to affect how a child interacts with their environment and engages in activities typical for their age. The law prioritizes observable indicators that the injury is affecting the child’s cognitive, emotional, or behavioral processes.

The other options do not capture the full legal definition. A temporary psychological disturbance might not necessarily indicate long-term impairment. Emotional distress in itself can be subjective and may not reflect the child's overall functioning or developmental trajectory. Lastly, while a condition requiring medical treatment relates to concerns about children's mental health, it doesn't encompass the specific idea of a mental injury as it pertains to observable impairment. By focusing on observable effects, the correct choice aligns with the intent of the law to protect children from significant impairments in functioning due to mental injury.