Question

8. Which of the following is/are being asse of the following is/are being assessed intracranially with use of an ICP monitor? a. pressure b. patterns c. pulsations d. placement 9. Expanding intracranial lesions such as epidural hemato- mas may cause brain herniation through which of the fol- lowing structures? a. corpus callosum b. foramen magnum c. sella turcica d. superior sagittal sinus 10. Which of the following diagnostic studies does not require use of ionizing radiation? a. CT scan b. myelogram c. MRI d. arteriogram 11. Which of the following intracranial structures produces cerebrospinal fluid (CSF)? a. circle of Willis b. basal ganglia c. sylvian fissure d. choroid plexus 12. Giantism and dwarfism are conditions related to disorder of which of the following? a. cranial nerves b. pituitary gland c. medulla oblongata d. sylvian fissure

Answer 1

8. a. Pressure

This is used to find and monitor the pressure in the cranial cavity. It is very helpful in clinical conditions where the symptoms maybe due to changes in intracranial pressure. A high pressure may cause compression of brain. Low pressure may lead to various clinical conditions including vision changes, nausea etc.

9. b. Foramen magnum

These hematomas causes increase in the intracranial pressure. If the pressure increases and in absence of appropriate treatment, it can cause compression on brain tissue causing permanent damage. It may even cause the brain to herniate through foramen magnum.

10. c. MRI

This doesn’t require ionising radiation as it relies on magnetic resonance. The magnetic energy doesn’t use any kind of ionising radiation.

11. d. Choroid plexus

It produces the most of CSF. Even ependymal cells also produces small amounts of this fluid. The arterial blood is used in its production. The fluid carries various major functions in the nervous system like protection, nourishment and excretion of wastes.

12. b. Pituitary gland

These conditions occur due to changes in the production of the pituitary hormone called growth hormone. It’s increased production during growth period causes gigantism and decreased production causes dwarfism.

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