Myringitis bullosa is a disease characterized by formation of blebs on this structure. It is divided into two parts, one of which is also known as Shrapnel's part, which lies 
Myringitis bullosa is a disease characterized by formation of blebs on this structure. It is divided into two parts, one of which is also known as Shrapnel's part, which lies next to the notch of Rivinus. Its medial surface is innervated by Jacobson's nerve, which is a branch of the ninth cranial nerve. Of the two subdivisions – the pars flaccida and the pars tensa – the latter is characterized by a cone of light in its anteroinferior quadrant. It can be ruptured by fracture of the temporal bone or by fluid column pressure and is semi-transparent allowing such things as the long process of the incus to be seen through it. For 10 points, name this membrane that divides the external acoustic canal from the middle ear, and which is commonly known as the ear drum.
Myringitis bullosa is a disease characterized by formation of blebs on this structure.
{tympanic membrane} [accept {ear drum} before it is mentioned]