Free CNRN Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

The left cerebral hemisphere controls language (in most individuals) and motor function of the right side of the body. Expressive aphasia indicates Broca’s area involvement, while hemiparesis reflects motor cortex or corticospinal tract damage. Cerebellar lesions affect coordination, brainstem lesions affect cranial nerves and vital functions, and occipital lobe lesions primarily affect vision.

Comprehensive and Detailed Explanation:

Suctioning can increase intracranial pressure by stimulating coughing, hypoxia, and sympathetic responses. Preoxygenating the patient helps prevent hypoxia-induced cerebral vasodilation. Suction duration should be limited to avoid prolonged stimulation. Deep and frequent suctioning is avoided unless necessary. Performing suction without oxygen support increases risk of desaturation, which can worsen secondary brain injury.

Comprehensive and Detailed Explanation:

Acoustic neuroma (vestibular schwannoma) arises from the vestibulocochlear nerve (CN VIII), leading to progressive unilateral hearing loss, tinnitus, and balance disturbances. As the tumor grows, it may compress adjacent cranial nerves, including CN VII, causing facial weakness. Loss of smell is associated with olfactory nerve involvement, and swallowing difficulty relates to glossopharyngeal or vagus nerve dysfunction. Early recognition of auditory symptoms is key to diagnosis.

Comprehensive and Detailed Explanation:

Viral meningitis typically shows lymphocytic predominance, normal glucose levels, and mildly elevated protein in CSF. It is generally self-limiting compared to bacterial meningitis. Neutrophils, low glucose, and bacteria indicate bacterial infection. Extremely low protein alone is not diagnostic of viral meningitis.

Comprehensive and Detailed Explanation:

Expressive aphasia is caused by damage to Broca’s area in the dominant (usually left) frontal lobe. Patients understand language but have difficulty producing speech. The occipital lobe controls vision, the cerebellum regulates coordination, and the brainstem controls autonomic functions. Identifying the affected brain region helps guide rehabilitation and prognosis.