Hydrocephalus is due to a problem with the flow of the fluid that surrounds the brain. This fluid is called the cerebrospinal fluid, or CSF. The fluid surrounds the brain and spinal cord and helps cushion the brain. CSF normally moves through the brain and the spinal cord and is soaked into the bloodstream. The flow of CSF is blocked.
The Tesla Model S has a collision avoidance assist system that automatically engages the brakes to reduce the impact of a frontal collision. Automatic emergency braking will stop applying the brakes when the driver presses the accelerator pedal, the brake pedal, or sharply turns the steering wheel.
In electric vehicles, in addition to regenerative braking, there are normal friction (disc) brakes, just like in gasoline-powered cars. When you brake hard, the regenerative braking can't stop you fast enough, so the friction brakes are used as well. The only hybrid vehicle I've driven extensively is a Toyota FCHV.