ATI RN
Review System for Neurological Questions Questions
Question 1 of 5
The presence of Parkinsonism suggests damage to the following:
Correct Answer: B
Rationale: Black substance (substantia nigra) is the correct answer because Parkinsonism is characterized by the degeneration of dopaminergic neurons in the substantia nigra. This leads to the classic symptoms of tremor, bradykinesia, and rigidity due to the loss of dopamine in the basal ganglia, which regulates movement.
Question 2 of 5
In iron deficiency anaemia, the following is decreased:
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 3 of 5
An increase in PaCO2 leads to:
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 4 of 5
True statements about EOG (electro-oculogram) include:
Correct Answer: D
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 5 of 5
A 38-year-old female presents with muscle fatigue that is worse by the end of the day. She reports to have myalgias in the back of her neck, and at times her head "drops." She also states to sees "double" when watching television, or reading for a prolonged period of time. On physical examination, ptosis is produced when asking the patient to look at the ceiling without blinking. Pupillary function is intact. Appropriate serologic testing is obtained. On repetitive nerve stimulation, the amplitude of the compound muscle action potential progressively declines. Which of the following is most likely the diagnosis?
Correct Answer: D
Rationale: The patient's symptoms of fatigable weakness, ptosis, and diplopia, along with the decremental response on repetitive nerve stimulation, are classic for myasthenia gravis. This autoimmune disorder is caused by antibodies against acetylcholine receptors at the neuromuscular junction, leading to impaired muscle contraction. Botulism and Lambert-Eaton syndrome also cause weakness but have different clinical and electrophysiological features. Multiple sclerosis and acute inflammatory demyelinating polyradiculopathy do not typically present with fatigable weakness.