Free CNRN Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

Parkinson disease is a neurodegenerative disorder characterized by resting tremor, rigidity, bradykinesia, and postural instability due to dopamine depletion in the basal ganglia. Symptoms develop gradually. Sudden paralysis, fever, and vision loss are not features of Parkinson disease and suggest other neurological conditions.

Comprehensive and Detailed Explanation:

Clear fluid drainage from the nose (rhinorrhea) or ears (otorrhea) may indicate cerebrospinal fluid (CSF) leakage, a hallmark of basilar skull fracture. This finding suggests dural tear and requires immediate evaluation. Fever may occur later with infection but is not specific. Bilateral leg weakness suggests spinal cord injury. Absent bowel sounds are unrelated to skull fractures. CSF leak increases risk of meningitis, making infection prevention and monitoring essential.

Comprehensive and Detailed Explanation:

Multiple sclerosis exacerbations occur due to demyelination in the central nervous system, leading to new or worsening neurological symptoms such as visual disturbances (optic neuritis), limb weakness, numbness, or coordination problems. Symptoms often fluctuate or relapse. Cardiac arrest, fever with rash, and isolated abdominal pain are not typical features of MS relapse.

Comprehensive and Detailed Explanation:

Dexamethasone is a corticosteroid used in brain tumor patients to reduce vasogenic cerebral edema surrounding the tumor. This decreases intracranial pressure and improves neurological symptoms. It does not directly treat seizures, cognitive decline, or infection. While seizure control may be needed in tumor patients, anticonvulsants are used for that purpose. Infection management requires antimicrobial therapy, not steroids.

Comprehensive and Detailed Explanation:

Trigeminal neuralgia is a chronic pain disorder involving the trigeminal nerve (CN V), characterized by sudden, severe, stabbing facial pain often triggered by light touch, chewing, or speaking. It is episodic and extremely painful. Hearing loss, bilateral leg paralysis, and isolated memory loss are not features of this condition. Management typically includes anticonvulsants such as carbamazepine.