She should stick to psychology and leave the electrical work to the professionals. A hole in the insulation of a wire won't do anything to stop the flow of electricity. It may shock you pretty good, but as long as the metal is still connected the current will still flow just fine.

In the human body, all of our nerve wiring is immersed in conductive fluids! Thus, the loss of the myelin sheaths around nerve tissue do specifically lead to short circuiting of signals. That is the cause of most severe permanent nerve damage, such as paraplegia. Being able to regrow the myelin insulation around nerve tissue is the major goal of medical research aimed at restoring control of limbs after traumatic paralyzing injuries.

There are few psychologists today who are not extremely well versed in the electrical networks of the human neural systems. It is basic to an understanding of human behaviour to have a firm grasp of the underlying structures. The anatomy of the brain is totally connected to its functions. Like love marriage (or a horse and carriage), you can't have one without the other. Nerves are not wires, and to equate the properties of one with the other is a serious mistake. To address the electrical wiring system for a moment, if the current is run to ground through the 'hole,' then the current will not flow through the system 'just fine.'

This is serious and exciting work because it promises a better understanding of human development and particular behaviours. She is to be congratulated and encouraged.