A10-month-old infant has an enlarging head circumference and delayed overall development. she has a bulging anterior fontanelle and her csf pressure is elevated. based on these findings, answer the following questions: (a) what are the possible cause(s) of an enlarged head? (b) which tests might be 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.

For every corresponding pair of cross sections, the area of the cross section of a sphere with radius r is equal to the area of the cross section of a cylinder with radius and height 2r minus the volume of two cones, each with a radius and height of r. a cross section of the sphere is and a cross section of the cylinder minus the cones, taken parallel to the base of cylinder, is the volume of the cylinder with radius r and height 2r is and the volume of each cone with radius r and height r is 1/3 pie r^3. so the volume of the cylinder minus the two cones is therefore, the volume of the cylinder is 4/3pie r^3 by cavalieri's principle. (fill in options are: r/2- r- 2r- an annulus- a circle -1/3pier^3- 2/3pier^3- 4/3pier^3- 5/3pier^3- 2pier^3- 4pier^3)