Agenesis of this structure leads to formation of Probst Bundles. According to a formula developed by Jancke and Steinmetz, the cross-sectional area of this structure is proportional to the two-thirds 
Agenesis of this structure leads to formation of Probst Bundles. According to a formula developed by Jancke and Steinmetz, the cross-sectional area of this structure is proportional to the two-thirds power of the volume of a larger structure containing it. This structure is divided into the rostrum, genu, body, isthmus, and splenium. Current controversy exists over the contention that this structure is larger in females than in males, which if true might explain the superior development of verbal abilities in females. "Split-Brain" patients have had it surgically severed, in order to treat epilepsy by preventing the spread of seizures across the brain. For 10 points, name this wide, flat bundle of nerves which connects the hemispheres of the brain.
Agenesis of this structure leads to formation of Probst Bundles.
corpus callosum [do not accept or prompt on "brain"]