Page 1 of 91
PMHNP Boards - Scientific Foundation and
Advance Practice Skills 2026/2027 ACTUAL
QUESTIONS WITH VERIFIED ANSWERS | PDF
Q1. Which neurotransmitter is primarily implicated in the
pathophysiology of major depressive disorder (MDD) based
on the monoamine hypothesis?
Answer: Serotonin, norepinephrine, and dopamine.
Rationale: The monoamine hypothesis posits that MDD results from
deficient neurotransmission of serotonin, norepinephrine, and
dopamine. This is supported by the mechanism of action of most
antidepressants.
Q2. The amygdala is most closely associated with which
function?
Answer: Emotional processing, particularly fear and threat
detection.
,Page 2 of 91
Rationale: The amygdala is a key limbic structure involved in the
generation and regulation of emotions such as fear, anxiety, and
aggression. Hyperactivity of the amygdala is observed in
anxiety disorders.
Q3. Which brain region shows reduced volume and activity in
patients with chronic post-traumatic stress disorder (PTSD)?
Answer:* Hippocampus.
Rationale: Chronic stress and elevated cortisol levels in PTSD are
associated with hippocampal atrophy, impairing memory
consolidation and context discrimination.
Q4. The default mode network (DMN) is characterized by:
Answer:* Increased activity during rest and self-referential
thought, and decreased activity during goal-directed tasks.
Rationale: Hyperconnectivity of the DMN is implicated in
rumination and depression; it is a target for interventions like
transcranial magnetic stimulation (TMS).
,Page 3 of 91
Q5. Which of the following is a characteristic finding in
schizophrenia on neuroimaging?
Answer:* Enlarged lateral ventricles and reduced gray matter
volume.
Rationale: Structural MRI studies consistently show ventricular
enlargement and cortical gray matter loss, particularly in the
temporal and frontal lobes, in schizophrenia.
Q6. The dopamine hypothesis of schizophrenia initially
focused on:
Answer:* Excess dopamine activity in the mesolimbic
pathway.
Rationale: The original hypothesis proposed that
hyperdopaminergia in the mesolimbic tract causes positive
symptoms. Newer models also implicate hypodopaminergia in
the mesocortical pathway for negative and cognitive symptoms.
, Page 4 of 91
Q7. Which neuroendocrine abnormality is commonly
associated with major depressive disorder?
Answer:* Hyperactivity of the hypothalamic-pituitary-adrenal
(HPA) axis.
Rationale: Elevated cortisol levels and blunted dexamethasone
suppression test (DST) response are frequent in MDD, indicating
HPA axis dysregulation.
Q8. The locus coeruleus is the primary source of which
neurotransmitter?
Answer:* Norepinephrine.
Rationale: The locus coeruleus in the brainstem projects
norepinephrine throughout the CNS and is involved in arousal,
attention, and stress response.
Q9. In obsessive-compulsive disorder (OCD), functional
neuroimaging often shows hyperactivity in:
Answer:* Orbitofrontal cortex, anterior cingulate cortex, and
PMHNP Boards - Scientific Foundation and
Advance Practice Skills 2026/2027 ACTUAL
QUESTIONS WITH VERIFIED ANSWERS | PDF
Q1. Which neurotransmitter is primarily implicated in the
pathophysiology of major depressive disorder (MDD) based
on the monoamine hypothesis?
Answer: Serotonin, norepinephrine, and dopamine.
Rationale: The monoamine hypothesis posits that MDD results from
deficient neurotransmission of serotonin, norepinephrine, and
dopamine. This is supported by the mechanism of action of most
antidepressants.
Q2. The amygdala is most closely associated with which
function?
Answer: Emotional processing, particularly fear and threat
detection.
,Page 2 of 91
Rationale: The amygdala is a key limbic structure involved in the
generation and regulation of emotions such as fear, anxiety, and
aggression. Hyperactivity of the amygdala is observed in
anxiety disorders.
Q3. Which brain region shows reduced volume and activity in
patients with chronic post-traumatic stress disorder (PTSD)?
Answer:* Hippocampus.
Rationale: Chronic stress and elevated cortisol levels in PTSD are
associated with hippocampal atrophy, impairing memory
consolidation and context discrimination.
Q4. The default mode network (DMN) is characterized by:
Answer:* Increased activity during rest and self-referential
thought, and decreased activity during goal-directed tasks.
Rationale: Hyperconnectivity of the DMN is implicated in
rumination and depression; it is a target for interventions like
transcranial magnetic stimulation (TMS).
,Page 3 of 91
Q5. Which of the following is a characteristic finding in
schizophrenia on neuroimaging?
Answer:* Enlarged lateral ventricles and reduced gray matter
volume.
Rationale: Structural MRI studies consistently show ventricular
enlargement and cortical gray matter loss, particularly in the
temporal and frontal lobes, in schizophrenia.
Q6. The dopamine hypothesis of schizophrenia initially
focused on:
Answer:* Excess dopamine activity in the mesolimbic
pathway.
Rationale: The original hypothesis proposed that
hyperdopaminergia in the mesolimbic tract causes positive
symptoms. Newer models also implicate hypodopaminergia in
the mesocortical pathway for negative and cognitive symptoms.
, Page 4 of 91
Q7. Which neuroendocrine abnormality is commonly
associated with major depressive disorder?
Answer:* Hyperactivity of the hypothalamic-pituitary-adrenal
(HPA) axis.
Rationale: Elevated cortisol levels and blunted dexamethasone
suppression test (DST) response are frequent in MDD, indicating
HPA axis dysregulation.
Q8. The locus coeruleus is the primary source of which
neurotransmitter?
Answer:* Norepinephrine.
Rationale: The locus coeruleus in the brainstem projects
norepinephrine throughout the CNS and is involved in arousal,
attention, and stress response.
Q9. In obsessive-compulsive disorder (OCD), functional
neuroimaging often shows hyperactivity in:
Answer:* Orbitofrontal cortex, anterior cingulate cortex, and
