ATI RN
Questions Neurological System Questions
Question 1 of 5
The presence of dysdiadochokinesis suggests damage to the following:
Correct Answer: C
Rationale: Cerebellar is the correct answer because dysdiadochokinesis, or the inability to perform rapid alternating movements, is a hallmark sign of cerebellar dysfunction. The cerebellum is responsible for coordinating voluntary movements, and damage to this area disrupts the timing and precision of motor actions.
Question 2 of 5
The lateral spinothalamic tract:
Correct Answer: D
Rationale: The lateral spinothalamic tract carries second-order neurons transmitting pain and temperature information to the thalamus. It is a critical pathway for sensory perception and is involved in relaying these sensations to higher brain centers.
Question 3 of 5
The following are neurotransmitters in the autonomic ganglia:
Correct Answer: C
Rationale: Acetylcholine is the primary neurotransmitter in autonomic ganglia, where it mediates synaptic transmission between pre- and post-ganglionic neurons. GABA, noradrenaline, and 5-HT are not involved in ganglionic transmission.
Question 4 of 5
An increase in intra-ocular pressure occurs with:
Correct Answer: D
Rationale: Intraocular pressure increases during normal blinking, coughing, and hypercarbia due to changes in intrathoracic pressure and blood flow.
Question 5 of 5
A 33-year-old female presents with drooping of her eyelid that seem to occur while reading or watching television. This appears to get worse later in the day. She also reports that at times she sees "double." A few weeks ago, she was prescribed an antibiotic medication for a urinary tract infection. She does not recall the name of the antibiotic. On physical exam, bilateral ptosis, with the left affected more than the right is seen. Pupillary function intact. A glove is filled with ice, and subsequently applied to the patient's eyelid. After two minutes, the patient's ptosis has improved. Which of the following is most likely to yield rapid symptom improvement?
Correct Answer: C
Rationale: The patient's symptoms of ptosis and diplopia that worsen with activity and improve with rest are classic for myasthenia gravis. The ice pack test, which improves ptosis, further supports this diagnosis. Acetylcholinesterase inhibitors, such as pyridostigmine, are the first-line treatment for symptomatic improvement in myasthenia gravis. Corticosteroids and plasma exchange are used for long-term management or severe cases, while thymectomy is a surgical option for thymoma-associated myasthenia gravis.