ABPN ABPN Basic 2

Question 1

Which neurotransmitter is most implicated in the positive symptoms of schizophrenia?

Accepted Answer

Dopamine

Answer

Excess dopamine activity in the mesolimbic pathway drives positive symptoms like hallucinations and delusions.

Question 2

A patient on lithium presents with tremor, ataxia, and confusion. What is the priority action?

Accepted Answer

Check a serum lithium level

Answer

These signs suggest lithium toxicity, so an immediate serum level guides management.

Question 3

Which cranial nerve is assessed by testing the corneal reflex's afferent limb?

Accepted Answer

CN V

Answer

The trigeminal nerve (CN V) carries the sensory afferent limb of the corneal reflex.

Question 4

What is the most specific first-line treatment for status epilepticus in the acute setting?

Accepted Answer

IV benzodiazepine

Answer

IV benzodiazepines such as lorazepam are first-line to abort ongoing seizures.

Question 5

Which finding best distinguishes delirium from dementia?

Accepted Answer

Fluctuating level of consciousness

Answer

Delirium features acute onset with a fluctuating, impaired level of consciousness and attention.

American Board of Psychiatry and Neurology Practice Test