Exam 8: Central Nervous System

Optimal detail of posterior fossa structures can be obscured by beam-hardening artifact associated with CT, making MRI the initial modality of choice for evaluating patients of all ages.

About 80% of all strokes are caused by small vessel disease.

A ventricular shunt is placed between the ventricles and the _____ to drain excess CSF in patients diagnosed with hydrocephalus.

In patients previously treated for brain neoplasms, who subsequently present with new neurologic complaints, distinguishing between radiation necrosis and tumor recurrence is relatively simple.

Distinguishing clinical features of astrocytomas include

In spinal tumor diagnosis and evaluation, conventional spine radiographs are primarily reserved for demonstrating bony destruction and widening of the vertebral pedicles related to tumor growth.

Noncontrast brain CT scans are most commonly used to diagnose patients with stroke-like symptoms because of their

Which of the following structures is NOT considered part of the brainstem?

Vertebral disks are covered by a tough outer covering called the nucleus pulposus.

Lewy body dementia is associated with Pick disease.

Which of the following brain neoplasm is associated with the highest survival rate?

The most common location for herniated disks in the lower back are

A contrast-enhanced CT of the spine is the best imaging choice for postoperative patients in the evaluation of scarring when the tissue extends beyond the vertebral interspace.

Which of the following neurologic deficits are associated with a meningomyelocele? 1)Diminished control of the urinary bladder 2)Diminished control of the bowel 3)Diminished control of the lower extremities

The blood-brain barrier consists of a network of capillaries that connects the arteries and veins of the brain that prevent the passage of unwanted macromolecules and fluids from leaking into the brain parenchyma.

Which of the following pathologic conditions would demonstrate as a decrease in tissue density on CT images of the CNS? 1)Cerebral infarctions 2)Cerebral calcifications 3)CNS cysts

Spheres, coils, or beads are used to embolize or occlude cerebral vasculature, as in the case of an aneurysm or arteriovenous malformation (AVM).

What is the most common form of dementia affecting individuals under the age of 65 years?

What is the most common cause of chronic meningitis?

The most common locations for disk herniation are in the lower cervical and lower lumbar regions.