The dearth of his acting ability comes to full bloom with Ayano dancing through a number of outlandish set-ups, such as Nakoshi bringing a hardened Yakuza to tears by drawing out his childhood trauma or eventually putting a drill to his own skull and pressing the trigger, all with real conviction.
Penfield first mapped the cortex in humans while operating the brain of the patients who had epilepsy and other disorders.
When you touch something with your index finger, a neighboring area of your brain receives a signal about that touch sensation.
That is why the homunculus represents variation in sizes as it extends over the cortex.