NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Page 1 | Passing Score: 80%
WALDEN UNIVERSITY
NRNP6635 / NRNP 6635 (Latest 2026/2027):
Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden
2026/2027
PSYCHOPATHOLOGY & DIAGNOSTIC REASONING · Official Exam 2026/2027
100 80% CERTIFIED
QUESTIONS PASSING SCORE RECERTIFICATION
TABLE OF CONTENTS
Section 1 Neurobiological Foundations of Psychopathology Q1-20
Section 2 Mood, Anxiety, and Trauma-Related Disorders Q21-40
Section 3 Psychotic, Personality, and Dissociative Disorders Q41-60
Section 4 Substance Use, Eating, and Impulse Control Disorders Q61-80
Section 5 Child/Adolescent Disorders and Diagnostic Reasoning Q81-100
Instructions: Select the single best answer for each question. This exam is designed for NRNP 6635 Psychopathology
and Diagnostic Reasoning midterm exam preparation. Passing score: 80% (80 questions correct).
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 1 of 51
, SECTION 1 | NEUROBIOLOGICAL FOUNDATIONS OF PSYCHOPATHOLOGY | Q1-Q20 | NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam -
Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027
Q1 Question 1 of 100
A 34-year-old man presents with abrupt onset of disinhibition, emotional lability, and compulsive
behaviors following a traumatic brain injury to the right frontal lobe. The psychiatric nurse practitioner
recognizes that damage to the orbitofrontal cortex most directly impairs which executive function?
A. Behavioral inhibition and social decision-making
B. Working memory capacity and information processing speed
C. Verbal fluency and categorical reasoning
D. Spatial orientation and visual-spatial integration
Correct Answer: A
Rationale:
The orbitofrontal cortex is critical for behavioral inhibition, social decision-making, and emotional regulation.
Damage to this region produces disinhibition, impulsivity, and socially inappropriate behavior, consistent
with this patient's presentation. Working memory is more associated with the dorsolateral prefrontal cortex,
and spatial functions with the parietal lobe.
Q2 Question 2 of 100
A 45-year-old woman with recurrent major depressive disorder has a positron emission tomography
scan showing decreased metabolic activity in the left dorsolateral prefrontal cortex. This finding is
most consistent with which neurobiological model of depression?
A. The monoamine hypothesis involving serotonin and norepinephrine depletion
B. The neurodegenerative model involving progressive hippocampal volume loss
C. The prefrontal-limbic dysregulation model showing impaired top-down cortical control over limbic
structures
D. The glutamate excitotoxicity model involving excessive NMDA receptor activation
Correct Answer: C
Rationale:
Hypoactivity in the dorsolateral prefrontal cortex with concurrent hyperactivity in limbic structures such as
the amygdala is consistent with the prefrontal-limbic dysregulation model. This model posits that impaired
cortical regulation fails to inhibit limbic hyperresponsivity, producing depressive symptoms. The monoamine
hypothesis focuses on neurotransmitter depletion rather than circuit dysfunction.
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 2 of 51
, Q3 Question 3 of 100
A 28-year-old man with schizophrenia shows significant ventricular enlargement and reduced cortical
gray matter on MRI. His twin brother, who does not have schizophrenia, has normal brain imaging.
This discordance is best explained by which pathophysiological concept?
A. Genetic determinism, where the affected twin carries a unique mutation not present in the unaffected
twin
B. Neuroinflammation, where an autoimmune process selectively targeted the affected twin's central
nervous system
C. Neuroplasticity, where the unaffected twin developed compensatory neural pathways that prevented
structural changes
D. Gene-environment interaction, where epigenetic modifications and environmental stressors
triggered neurodevelopmental abnormalities in the affected twin
Correct Answer: D
Rationale:
In monozygotic twins discordant for schizophrenia, the concordance rate is approximately 45-50%,
indicating that genetics alone cannot explain the disorder. Gene-environment interactions, including
epigenetic modifications, perinatal complications, cannabis use, and psychosocial stressors, trigger
neurodevelopmental abnormalities in the affected twin. Pure genetic determinism would predict near-100%
concordance.
Q4 Question 4 of 100
A 52-year-old woman with treatment-resistant depression undergoes transcranial magnetic
stimulation targeting the left dorsolateral prefrontal cortex. The therapeutic rationale for this approach
is based on which neurophysiological principle?
A. High-frequency TMS to the left DLPFC enhances cortical excitability and improves top-down
regulation of limbic structures
B. Low-frequency TMS to the left DLPFC suppresses overactive cortical circuits contributing to
rumination
C. TMS directly increases serotonin synthesis in the raphe nuclei through electromagnetic induction
D. TMS stimulates hippocampal neurogenesis by activating brain-derived neurotrophic factor release
Correct Answer: A
Rationale:
High-frequency repetitive TMS to the left dorsolateral prefrontal cortex increases cortical excitability in this
typically hypoactive region in depression. By enhancing DLPFC activity, TMS improves top-down regulatory
control over hyperactive limbic structures such as the amygdala. Low-frequency stimulation would further
inhibit an already hypoactive region, which is contraindicated for left DLPFC treatment.
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 3 of 51
, Q5 Question 5 of 100
A 19-year-old college student experiences persistent auditory hallucinations and disorganized
thinking. Genetic testing reveals a polymorphism in the COMT gene resulting in increased enzyme
activity. The COMT Val158Met polymorphism affects dopamine catabolism most prominently in which
brain region?
A. The prefrontal cortex, where COMT is the major enzyme responsible for dopamine degradation due
to low dopamine transporter density
B. The striatum, where COMT plays the primary role in dopamine clearance
C. The nucleus accumbens, where COMT regulates reward pathway signaling
D. The substantia nigra, where COMT controls dopamine synthesis and release
Correct Answer: A
Rationale:
In the prefrontal cortex, dopamine transporter (DAT) expression is relatively low compared to the striatum,
making COMT the primary enzyme responsible for dopamine clearance. The Val158Met polymorphism
affects COMT enzymatic activity, with the Val allele producing a more active enzyme that degrades
prefrontal dopamine more rapidly, potentially contributing to cognitive symptoms of schizophrenia.
Q6 Question 6 of 100
A 60-year-old man presents with personality changes, disinhibition, and compulsive eating behavior.
Neuroimaging reveals significant atrophy in the anterior temporal lobes and orbitofrontal cortex. This
presentation is most consistent with which variant of frontotemporal dementia?
A. The behavioral variant, characterized by early personality changes, disinhibition, and executive
dysfunction due to orbitofrontal and anterior temporal degeneration
B. The semantic variant, characterized by loss of word meaning and object recognition due to temporal
pole degeneration
C. The nonfluent variant, characterized by progressive speech apraxia and agrammatism due to left
frontal insular degeneration
D. The progressive supranuclear palsy variant, characterized by vertical gaze palsy and axial rigidity
Correct Answer: A
Rationale:
Behavioral variant frontotemporal dementia presents with early personality changes, disinhibition, loss of
social norms, compulsive behaviors, and dietary changes due to degeneration of the orbitofrontal cortex
and anterior temporal lobes. The semantic variant primarily affects language comprehension, and the
nonfluent variant affects speech production.
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 4 of 51
WALDEN UNIVERSITY
NRNP6635 / NRNP 6635 (Latest 2026/2027):
Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden
2026/2027
PSYCHOPATHOLOGY & DIAGNOSTIC REASONING · Official Exam 2026/2027
100 80% CERTIFIED
QUESTIONS PASSING SCORE RECERTIFICATION
TABLE OF CONTENTS
Section 1 Neurobiological Foundations of Psychopathology Q1-20
Section 2 Mood, Anxiety, and Trauma-Related Disorders Q21-40
Section 3 Psychotic, Personality, and Dissociative Disorders Q41-60
Section 4 Substance Use, Eating, and Impulse Control Disorders Q61-80
Section 5 Child/Adolescent Disorders and Diagnostic Reasoning Q81-100
Instructions: Select the single best answer for each question. This exam is designed for NRNP 6635 Psychopathology
and Diagnostic Reasoning midterm exam preparation. Passing score: 80% (80 questions correct).
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 1 of 51
, SECTION 1 | NEUROBIOLOGICAL FOUNDATIONS OF PSYCHOPATHOLOGY | Q1-Q20 | NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam -
Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027
Q1 Question 1 of 100
A 34-year-old man presents with abrupt onset of disinhibition, emotional lability, and compulsive
behaviors following a traumatic brain injury to the right frontal lobe. The psychiatric nurse practitioner
recognizes that damage to the orbitofrontal cortex most directly impairs which executive function?
A. Behavioral inhibition and social decision-making
B. Working memory capacity and information processing speed
C. Verbal fluency and categorical reasoning
D. Spatial orientation and visual-spatial integration
Correct Answer: A
Rationale:
The orbitofrontal cortex is critical for behavioral inhibition, social decision-making, and emotional regulation.
Damage to this region produces disinhibition, impulsivity, and socially inappropriate behavior, consistent
with this patient's presentation. Working memory is more associated with the dorsolateral prefrontal cortex,
and spatial functions with the parietal lobe.
Q2 Question 2 of 100
A 45-year-old woman with recurrent major depressive disorder has a positron emission tomography
scan showing decreased metabolic activity in the left dorsolateral prefrontal cortex. This finding is
most consistent with which neurobiological model of depression?
A. The monoamine hypothesis involving serotonin and norepinephrine depletion
B. The neurodegenerative model involving progressive hippocampal volume loss
C. The prefrontal-limbic dysregulation model showing impaired top-down cortical control over limbic
structures
D. The glutamate excitotoxicity model involving excessive NMDA receptor activation
Correct Answer: C
Rationale:
Hypoactivity in the dorsolateral prefrontal cortex with concurrent hyperactivity in limbic structures such as
the amygdala is consistent with the prefrontal-limbic dysregulation model. This model posits that impaired
cortical regulation fails to inhibit limbic hyperresponsivity, producing depressive symptoms. The monoamine
hypothesis focuses on neurotransmitter depletion rather than circuit dysfunction.
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 2 of 51
, Q3 Question 3 of 100
A 28-year-old man with schizophrenia shows significant ventricular enlargement and reduced cortical
gray matter on MRI. His twin brother, who does not have schizophrenia, has normal brain imaging.
This discordance is best explained by which pathophysiological concept?
A. Genetic determinism, where the affected twin carries a unique mutation not present in the unaffected
twin
B. Neuroinflammation, where an autoimmune process selectively targeted the affected twin's central
nervous system
C. Neuroplasticity, where the unaffected twin developed compensatory neural pathways that prevented
structural changes
D. Gene-environment interaction, where epigenetic modifications and environmental stressors
triggered neurodevelopmental abnormalities in the affected twin
Correct Answer: D
Rationale:
In monozygotic twins discordant for schizophrenia, the concordance rate is approximately 45-50%,
indicating that genetics alone cannot explain the disorder. Gene-environment interactions, including
epigenetic modifications, perinatal complications, cannabis use, and psychosocial stressors, trigger
neurodevelopmental abnormalities in the affected twin. Pure genetic determinism would predict near-100%
concordance.
Q4 Question 4 of 100
A 52-year-old woman with treatment-resistant depression undergoes transcranial magnetic
stimulation targeting the left dorsolateral prefrontal cortex. The therapeutic rationale for this approach
is based on which neurophysiological principle?
A. High-frequency TMS to the left DLPFC enhances cortical excitability and improves top-down
regulation of limbic structures
B. Low-frequency TMS to the left DLPFC suppresses overactive cortical circuits contributing to
rumination
C. TMS directly increases serotonin synthesis in the raphe nuclei through electromagnetic induction
D. TMS stimulates hippocampal neurogenesis by activating brain-derived neurotrophic factor release
Correct Answer: A
Rationale:
High-frequency repetitive TMS to the left dorsolateral prefrontal cortex increases cortical excitability in this
typically hypoactive region in depression. By enhancing DLPFC activity, TMS improves top-down regulatory
control over hyperactive limbic structures such as the amygdala. Low-frequency stimulation would further
inhibit an already hypoactive region, which is contraindicated for left DLPFC treatment.
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 3 of 51
, Q5 Question 5 of 100
A 19-year-old college student experiences persistent auditory hallucinations and disorganized
thinking. Genetic testing reveals a polymorphism in the COMT gene resulting in increased enzyme
activity. The COMT Val158Met polymorphism affects dopamine catabolism most prominently in which
brain region?
A. The prefrontal cortex, where COMT is the major enzyme responsible for dopamine degradation due
to low dopamine transporter density
B. The striatum, where COMT plays the primary role in dopamine clearance
C. The nucleus accumbens, where COMT regulates reward pathway signaling
D. The substantia nigra, where COMT controls dopamine synthesis and release
Correct Answer: A
Rationale:
In the prefrontal cortex, dopamine transporter (DAT) expression is relatively low compared to the striatum,
making COMT the primary enzyme responsible for dopamine clearance. The Val158Met polymorphism
affects COMT enzymatic activity, with the Val allele producing a more active enzyme that degrades
prefrontal dopamine more rapidly, potentially contributing to cognitive symptoms of schizophrenia.
Q6 Question 6 of 100
A 60-year-old man presents with personality changes, disinhibition, and compulsive eating behavior.
Neuroimaging reveals significant atrophy in the anterior temporal lobes and orbitofrontal cortex. This
presentation is most consistent with which variant of frontotemporal dementia?
A. The behavioral variant, characterized by early personality changes, disinhibition, and executive
dysfunction due to orbitofrontal and anterior temporal degeneration
B. The semantic variant, characterized by loss of word meaning and object recognition due to temporal
pole degeneration
C. The nonfluent variant, characterized by progressive speech apraxia and agrammatism due to left
frontal insular degeneration
D. The progressive supranuclear palsy variant, characterized by vertical gaze palsy and axial rigidity
Correct Answer: A
Rationale:
Behavioral variant frontotemporal dementia presents with early personality changes, disinhibition, loss of
social norms, compulsive behaviors, and dietary changes due to degeneration of the orbitofrontal cortex
and anterior temporal lobes. The semantic variant primarily affects language comprehension, and the
nonfluent variant affects speech production.
NRNP6635 / NRNP 6635 (Latest 2026/2027): Midterm Exam - Psychopathology and Diagnostic Reasoning - Walden 2026/2027 2026/2027 | Passing Score: 80% | Page 4 of 51
