Comprehensive Assessment of Pathophysiology, Pharmacological Management, and Evidence-Based Nursing Interventions for Acute and Chronic Neurological Conditions Across the Care Continuum

Comprehensive Assessment of Pathophysiology, Pharmacological
Management, and Evidence-Based Nursing Interventions for Acute
and Chronic Neurological Conditions Across the Care Continuum
Difficulty Level: Advanced / Hard / Mixed
Target Audience: Professional neuroscience nurses preparing for CNRN certification

Instructions for each question:
Select the single best answer. Correct answer and rationale follow each question.

Section 1: Neuroanatomy & Physiology (Questions 1–15)
1. A patient has a lesion in the left optic tract. Which visual field deficit would the nurse expect?
A) Left homonymous hemianopia
B) Right homonymous hemianopia
C) Bitemporal heteronymous hemianopia
D) Left monocular blindness
Correct Answer: B
Rationale: The left optic tract carries fibers from the left temporal retina (nasal visual field of right eye)
and left nasal retina (temporal visual field of left eye). A left tract lesion causes right homonymous
hemianopia.
2. Which artery is MOST commonly occluded in a classic lateral medullary syndrome (Wallenberg syndrome)?
A) Anterior spinal artery
B) Posterior inferior cerebellar artery (PICA)
C) Anterior inferior cerebellar artery
D) Superior cerebellar artery
Correct Answer: B
Rationale: PICA occlusion affects the lateral medulla, causing ipsilateral ataxia, facial numbness,
Horner syndrome, and contralateral limb pain/temp loss.
3. The nurse assesses a patient with decerebrate posturing. This finding localizes to which level of the CNS?
A) Cerebral cortex
B) Basal ganglia
C) Midbrain (red nucleus)
D) Medulla oblongata
Correct Answer: C
Rationale: Decerebrate posturing (arms extended, internally rotated) indicates a lesion at the midbrain
level, below the red nucleus.
4. Which cranial nerve is responsible for the afferent limb of the gag reflex?
A) CN V
B) CN VII
C) CN IX
D) CN X

,Correct Answer: C
Rationale: CN IX (glossopharyngeal) provides sensory (afferent) input for the gag reflex. CN X provides
motor (efferent).
5. A patient with a right hemispheric stroke has left-sided neglect. Which artery territory is most likely involved?
A) Right anterior cerebral artery
B) Right middle cerebral artery
C) Right posterior cerebral artery
D) Right posterior inferior cerebellar artery
Correct Answer: B
Rationale: Right MCA strokes commonly cause left hemispatial neglect, especially with parietal lobe
involvement.
6. Theta waves on EEG are normal in which population but abnormal in awake adults?
A) Newborns
B) Children under 5 years
C) Adolescents during sleep
D) Elderly during hyperventilation
Correct Answer: B
Rationale: Theta (4–7 Hz) is normal in drowsy children but indicates encephalopathy or focal
dysfunction in awake adults.
7. Which structure is the primary pacemaker of the sleep-wake cycle?
A) Pineal gland
B) Suprachiasmatic nucleus (SCN)
C) Reticular activating system
D) Locus coeruleus
Correct Answer: B
Rationale: The SCN in the hypothalamus receives light input from the retina and regulates circadian
rhythms.
8. Dysfunction of the basal ganglia typically produces which movement disorder?
A) Intention tremor
B) Resting tremor
C) Action tremor
D) Postural tremor
Correct Answer: B
Rationale: Resting tremor (e.g., Parkinson’s) is characteristic of basal ganglia pathology, especially
substantia nigra.
9. The blood-brain barrier (BBB) is primarily formed by:
A) Astrocytes and microglia
B) Tight junctions between endothelial cells of brain capillaries
C) Pericytes and ependymal cells
D) Choroid plexus epithelial cells
Correct Answer: B

, Rationale: Tight junctions of cerebral capillary endothelial cells, supported by astrocytic foot processes,
form the BBB.
10. The nurse notes that a patient cannot recognize a familiar object (a key) by touch alone, despite intact primary
sensation. This is:
A) Agnosia
B) Apraxia
C) Aphasia
D) Alexia
Correct Answer: A
Rationale: Tactile agnosia (astereognosis) is the inability to recognize objects by touch, typically from
contralateral parietal lobe lesion.
11. Which neurotransmitter is markedly reduced in the striatum of patients with Huntington disease?
A) Dopamine
B) Serotonin
C) Acetylcholine
D) GABA
Correct Answer: D
Rationale: Loss of GABAergic medium spiny neurons in the striatum causes disinhibition of
thalamocortical pathways.
12. During the Valsalva maneuver, intracranial pressure (ICP) transiently increases. The nurse knows this is due to:
A) Increased venous return to the heart
B) Increased intrathoracic pressure impeding jugular venous outflow
C) Decreased cerebral perfusion pressure
D) Direct vasodilation of cerebral arteries
Correct Answer: B
Rationale: Elevated intrathoracic/abdominal pressure impedes jugular venous drainage, raising
cerebral blood volume and ICP.
13. An upper motor neuron (UMN) lesion is characterized by:
A) Flaccid paralysis and fasciculations
B) Hyporeflexia and muscle atrophy
C) Hyperreflexia and Babinski sign
D) Decreased tone and fibrillations
Correct Answer: C
Rationale: UMN lesions cause spasticity, hyperreflexia, clonus, and extensor plantar response
(Babinski).
14. Which part of the brain is most vulnerable to hypoxic-ischemic injury after cardiac arrest?
A) Frontal lobe
B) Occipital lobe
C) Hippocampus (CA1 sector)
D) Cerebellar vermis
Correct Answer: C
*Rationale: The hippocampus (especially CA1 pyramidal neurons) and Purkinje cells of cerebellum are highly sensitive