a. How is cerebrospinal fluid formed and drained? Describe its pathway within and around the brain.b What happens if CSF does not drain properly? Why is this consequence more harmful in adults?

What physiological activities distinguish non-REM sleep from REM sleep?

What constitutes the blood brain barrier?

Cerebrospinal fluid is formed bya. arachnoid granulations,b. dura mater,c. choroid plexuses,d. all of these.

The innermost layer of the meninges, delicate and adjacent to the brain tissue, is thea. dura mater,b. corpus callosum,c. arachnoid mater,d. pia mater.

List four ways in which the CNS is protected.

Multiple ChoiceMore than one choice may apply.Which is the innermost delicate meningeal layer?a. b. c. d.

A 10-month-old infant has an enlarging head circumference and delayed overall development. Her CSF pressure is elevated, and she has a bulging anterior fontanelle (fontanelles are the as yet unossified fibrous membranes connecting skull bones in infants). Based on these findings, answer the following questions:a. What are the possible cause(s) of an enlarged head?b. Which tests might be helpful in obtaining information about this infant's problem?c. Assuming the tests conducted showed the cerebral aqueduct to be constricted, which ventricles or CSF-containing areas would you expect to be enlarged? Which would likely not be visible? Respond to the same questions based on a finding of obstructed arachnoid granulations.

a. Define cerebrovascular accident or CVA.b. Describe its possible causes and consequences.