ADVANCED CLINICAL PSYCHOPHARMACOLOGY &
NEUROLOGY BOARD REVIEW
Comprehensive 200-Question Examination with Detailed Rationales
Core Case: 65-Year-Old Male with Late-Onset Schizophrenia and
Haloperidol-Induced Acute Dystonic Reactions
SECTION: BASAL GANGLIA NEUROANATOMY &
NIGROSTRIATAL PATHWAY (30 Questions)
Question 1: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 1), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 2: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 2), which specific
,anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 3: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 3), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
, Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 4: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 4), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 5: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 5), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
, A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 6: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 6), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
NEUROLOGY BOARD REVIEW
Comprehensive 200-Question Examination with Detailed Rationales
Core Case: 65-Year-Old Male with Late-Onset Schizophrenia and
Haloperidol-Induced Acute Dystonic Reactions
SECTION: BASAL GANGLIA NEUROANATOMY &
NIGROSTRIATAL PATHWAY (30 Questions)
Question 1: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 1), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 2: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 2), which specific
,anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 3: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 3), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
, Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 4: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 4), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 5: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 5), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
, A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
striatonigral GABAergic neurons) disinhibits the thalamus, causing
motor overactivity.
Question 6: In the evaluation of the 65-year-old male presenting with
haloperidol-induced acute dystonia (Question Variant 6), which specific
anatomical pathway within the basal ganglia circuitry is primarily
implicated in disinhibiting the motor thalamus and precipitating
involuntary muscle spasms?
A. The direct striatonigral pathway via GABAergic projections
leading to thalamocortical disinhibition and excessive motor drive
B. The indirect striatopallidal pathway via the external globus
pallidus and subthalamic nucleus
C. The hyperdirect corticostriatal glutamate pathway directly
targeting the substantia nigra pars compacta
D. The mesolimbic dopaminergic pathway projecting from the ventral
tegmental area to the nucleus accumbens
Correct Answer: A — Acute dystonic reactions stem from D2
receptor blockade disrupting the fine balance between direct and
indirect basal ganglia pathways. Direct pathway overactivity (via
