This structure can be repaired by inserting butterfly-wing-shaped cartilage in a procedure called BCT. In children under 6 years old, speech delays are a common side effect of an effusion condition that impairs this structure, which is corrected using grommets. The umbo is a depression (-5[1])that arises from the attachment of bones to this structure. (15[1])When this structure is healthy, (15[1])examining it yields a light cone on the anteroinferior quadrant of its pars tensa. Distortion of this structure by chronic negative (*) pressure (10[1])may create a retraction pocket that can form (10[1])a cholesteatoma. A myringotomy or the Valsalva maneuver can equalize (10[1]-5[1])the pressure across this structure, (-5[2])which is regulated by the Eustachian (10[1])tube. (-5[1])For 10 points, conductive deafness results from perforating what connective tissue that separates the outer ear and the middle ear? (10[2])■END■ (10[3])