dementia, delirum, depodepression

What is the primary difference between a transient dysfunction due to a traumatic life event (e.g., bereavement) and a mental disorder?

Transient dysfunction is an expected, temporary emotional response to a major loss that usually dissipates, allowing a return to healthy function. A mental disorder is a response significantly greater than expected, involving a clinically significant behavioral, emotional, or cognitive syndrome associated with distress or impaired functioning (e.g., unrelenting feelings, delusional thinking, or inability to function in major depression).

A patient presents with sudden confusion, impaired recent memory, agitation, and visual hallucinations, which worsen at night. What is the most likely mental disorder, and is it reversible?

This presentation is characteristic of Delirium (Acute Confusional State). It is usually reversible with proper and timely treatment of the underlying cause (e.g., infection, adverse drug reaction, dehydration).

List the four main headings of the mental status assessment using the A, B, C, T framework.

A: Appearance, B: Behavior, C: Cognition, T: Thought Processes.

A nurse asks a patient to remember four unrelated words (e.g., brown, honesty, tulip, eyedropper) and recalls them after 5, 10, and 30 minutes. What cognitive function is being assessed, and what is a normal response for someone under 60?

This assesses New Learning (Memory). A normal response for people younger than 60 years is an accurate three- or four-word recall after a 5-, 10-, and 30-minute delay.

Describe the key characteristics of Wernicke aphasia.

Wernicke aphasia (Receptive Aphasia) is characterized by fluent, effortless, well-articulated speech with paraphasias (word substitutions) and neologisms (made-up words), often making the speech incomprehensible. The person can hear sounds and words but cannot relate them to previous experiences or understand them effectively.

When screening for depression using the PHQ-2, what two questions are asked, and what indicates a positive screen requiring further assessment?

The two questions are: "Over the past 2 weeks have you felt down, depressed, or hopeless?" and "Over the past 2 weeks, have you felt little interest or pleasure in doing things?" Positive answers to these questions require further diagnostic tools (e.g., the PHQ-9).

What is the Glasgow Coma Scale (GCS) primarily used to assess, and why is it preferred over qualitative terms for consciousness?

The GCS is a quantitative tool used to assess consciousness. It assigns a numeric value to eye opening, best verbal response, and best motor response, thus avoiding ambiguity that can arise from qualitative terms (e.g., lethargic, obtunded) and improving consistency among multiple examiners.

An older adult patient scores $<26$ on the Montreal Cognitive Assessment (MoCA). What does this score indicate, and why is the MoCA preferred over the MMSE for certain cognitive impairments?

A score of $<26$ on the MoCA is indicative of mild cognitive impairment. The MoCA is preferred because it examines more cognitive domains (e.g., visuo-constructive ability, language, memory, auditory attention, conceptual thinking, working memory/calculations) and is more sensitive to mild cognitive impairment than the MMSE.