,UT Tyler NURS 5357 Exam 4 | Neurobiology: Mental Health &
Illness (2026) Q&A
1. The "positive symptoms" of schizophrenia, such as hallucinations, are primarily
attributed to hyperactivity in which dopamine pathway?
A) Mesocortical
B) Mesolimbic
C) Nigrostriatal
D) Tuberoinfundibular
Correct Answer: Mesolimbic
Rationale: Excessive dopamine in the mesolimbic pathway is the biological basis
for the psychotic or "positive" symptoms of schizophrenia. Negative symptoms and
cognitive deficits are associated with hypoactivity in the mesocortical pathway.
Extrapyramidal symptoms are linked to the nigrostriatal pathway, and
hyperprolactinemia is linked to the tuberoinfundibular pathway.
2. Negative symptoms and cognitive deficits in schizophrenia are associated with
hypoactivity in which pathway?
A) Mesocortical
B) Mesolimbic
C) Nigrostriatal
D) Tuberoinfundibular
Correct Answer: Mesocortical
,Rationale: Decreased dopamine in the mesocortical pathway leads to social
withdrawal, flat affect, and executive dysfunction. Positive symptoms are linked to
mesolimbic hyperactivity. The nigrostriatal and tuberoinfundibular pathways serve
motor and endocrine functi ons, respectively.
3. Extrapyramidal symptoms (EPS), such as tremors and rigidity, are caused by
dopamine blockade in the:
A) Mesolimbic pathway
B) Mesocortical pathway
C) Nigrostriatal pathway
D) Tuberoinfundibular pathway
Correct Answer: Nigrostriatal pathway
Rationale: Blocking dopamine in the nigrostriatal tract mimics the symptoms of
Parkinson's disease, leading to extrapyramidal symptoms such as tremor, rigidity,
and bradykinesia. The mesolimbic pathway is associated with positive symptoms,
the mesocortical pathway w ith negative symptoms, and the tuberoinfundibular
pathway with prolactin regulation.
4. Which brain structure is considered the "alarm system" of the brain, processing
fear and emotional responses?
A) Hippocampus
B) Thalamus
C) Amygdala
D) Hypothalamus
Correct Answer: Amygdala
, Rationale: The amygdala mediates the fear response; hyperactivity here is
common in anxiety and PTSD. The hippocampus is involved in memory
consolidation, the thalamus relays sensory information, and the hypothalamus
regulates homeostasis. A lesion in the amygdala w ould most likely cause a
flattened affect and lack of fear response.
5. Which structure is essential for the consolidation of short - term memory into
long - term memory?
A) Thalamus
B) Hippocampus
C) Basal ganglia
D) Pons
Correct Answer: Hippocampus
Rationale: The hippocampus is the primary center for memory; it is highly
sensitive to high levels of cortisol. The thalamus relays sensory information, the
basal ganglia are involved in motor control and habit learning, and the pons
connects the cerebrum to the cer ebellum.
6. Which brain region is responsible for executive functions, such as planning, logic,
and impulse control?
A) Parietal lobe
B) Occipital lobe
C) Prefrontal cortex
D) Cerebellum
Correct Answer: Prefrontal cortex
Illness (2026) Q&A
1. The "positive symptoms" of schizophrenia, such as hallucinations, are primarily
attributed to hyperactivity in which dopamine pathway?
A) Mesocortical
B) Mesolimbic
C) Nigrostriatal
D) Tuberoinfundibular
Correct Answer: Mesolimbic
Rationale: Excessive dopamine in the mesolimbic pathway is the biological basis
for the psychotic or "positive" symptoms of schizophrenia. Negative symptoms and
cognitive deficits are associated with hypoactivity in the mesocortical pathway.
Extrapyramidal symptoms are linked to the nigrostriatal pathway, and
hyperprolactinemia is linked to the tuberoinfundibular pathway.
2. Negative symptoms and cognitive deficits in schizophrenia are associated with
hypoactivity in which pathway?
A) Mesocortical
B) Mesolimbic
C) Nigrostriatal
D) Tuberoinfundibular
Correct Answer: Mesocortical
,Rationale: Decreased dopamine in the mesocortical pathway leads to social
withdrawal, flat affect, and executive dysfunction. Positive symptoms are linked to
mesolimbic hyperactivity. The nigrostriatal and tuberoinfundibular pathways serve
motor and endocrine functi ons, respectively.
3. Extrapyramidal symptoms (EPS), such as tremors and rigidity, are caused by
dopamine blockade in the:
A) Mesolimbic pathway
B) Mesocortical pathway
C) Nigrostriatal pathway
D) Tuberoinfundibular pathway
Correct Answer: Nigrostriatal pathway
Rationale: Blocking dopamine in the nigrostriatal tract mimics the symptoms of
Parkinson's disease, leading to extrapyramidal symptoms such as tremor, rigidity,
and bradykinesia. The mesolimbic pathway is associated with positive symptoms,
the mesocortical pathway w ith negative symptoms, and the tuberoinfundibular
pathway with prolactin regulation.
4. Which brain structure is considered the "alarm system" of the brain, processing
fear and emotional responses?
A) Hippocampus
B) Thalamus
C) Amygdala
D) Hypothalamus
Correct Answer: Amygdala
, Rationale: The amygdala mediates the fear response; hyperactivity here is
common in anxiety and PTSD. The hippocampus is involved in memory
consolidation, the thalamus relays sensory information, and the hypothalamus
regulates homeostasis. A lesion in the amygdala w ould most likely cause a
flattened affect and lack of fear response.
5. Which structure is essential for the consolidation of short - term memory into
long - term memory?
A) Thalamus
B) Hippocampus
C) Basal ganglia
D) Pons
Correct Answer: Hippocampus
Rationale: The hippocampus is the primary center for memory; it is highly
sensitive to high levels of cortisol. The thalamus relays sensory information, the
basal ganglia are involved in motor control and habit learning, and the pons
connects the cerebrum to the cer ebellum.
6. Which brain region is responsible for executive functions, such as planning, logic,
and impulse control?
A) Parietal lobe
B) Occipital lobe
C) Prefrontal cortex
D) Cerebellum
Correct Answer: Prefrontal cortex
