SCRN Predicted Questions and Correct Answers 2024

Non-communicating hydrocephalus - Obstructive - occlusion of csf flow communicating hydrocephalus - non obstructive, caused by inadequate absorption of CSF when the ventricular pathways are not obstructed (blood/csf are unable to pass through) Where are the venous sinuses located? - Subdural space What type of bleed would most likely cause hydrocephalus? - SAH Where is the most common place for obstructive hydrocephalus to occur? - Aqueduct of Sylvius At what rate is CSF produced? - 0.3-0.4 ml/min What does bloody csf indicate? - SAH or traumatic tap Xanthochromia (CSF) - Rust/yellow CSF = RBC's breakdown - implies blood is in CSF for several hours and not due to trauma (can indicate SAH) Aphasia, eye deviation to the left, right arm weakness. What kind of stroke - L MCA Circle of Willis - connects the anterior & posterior circulation Right leg weakness, abulia. What kind of stroke? - L ACA R occipital stroke, what type of field deficit? - Left side homonymous hemianopsia Where does the ACA supply blood flow to? - Frontal and parietal lobes Where does the MCA supply blood to? - Frontal, parietal, and temporal lobes Where does the PCA supply blood to? - Occipital lobe, midbrain Weber's syndrome - third nerve palsy (droopy eye) - seen with PCA strokes Parinaud syndrome - Downward gaze, nystagmus - seen with PCA strokes Pontine syndrome - Vertigo, n/v, balance issues Wallenberg syndrome - Loss of temperature/pain sensation in face, dysphagia, dysarthria Anterior inferior cerebellar artery - supplies cerebellum (pontine syndrome) Posterior inferior cerebellar artery - supplies cerebellum/medulla (wallenberg syndrome) Basilar artery - An artery, formed by the fusion of the vertebral arteries, that supplies blood to the brainstem and to the posterior cerebral arteries. Locked-in syndrome - Condition in which a patient is aware and awake but cannot move or communicate verbally because of complete paralysis of nearly all voluntary muscles except the eyes (pons) Lacunar stroke - D/t chronic hypertension Watershed stroke - D/t hypoxia/hypotension, occurs between major arterie