They are most effective when they involve either both hemispheres of the brain or the apricot:
<span style="font-size: 14pt">Man Was Oblivious Of 3-Inch Nail In His Head</span>
Dante Autullo posted an X-ray of a nail embedded in his brain on Facebook
12:14pm UK, Saturday January 21, 2012
Doctors in the US have removed a three-inch nail from a man's brain after he accidentally fired it into his head.
Dante Autullo remained conscious after the self-inflicted injury and initially believed he had only brushed his nail gun against his head.
The 32-year-old, who is recovering in hospital, even continued doing handiwork around his Chicago home for the rest of the day and chatted to his family.
But he was taken to hospital the following afternoon after waking up from a nap feeling ill.
An X-ray revealed the nail lodged in his brain – but Mr Autullo was still well enough to post an image of the scan on Facebook during an ambulance ride between hospitals.
Dante Autullo after he underwent surgery to remove the nail
Doctors explained the nail had barely missed the portion of the brain that controls motor function, meaning he was able to carry on with his day.
Although there are pain-sensitive nerves on a person's skull, there are none in the brain itself.
Following the surgery on Friday, Mr Autullo's wife Gail Glaenzer, with whom he has four children, said: "He feels good. He moved all his limbs, he's talking normal, he remembers everything.
"It's amazing, a miracle."
<span style="font-size: 14pt">Man Was Oblivious Of 3-Inch Nail In His Head</span>

Dante Autullo posted an X-ray of a nail embedded in his brain on Facebook
12:14pm UK, Saturday January 21, 2012
Doctors in the US have removed a three-inch nail from a man's brain after he accidentally fired it into his head.
Dante Autullo remained conscious after the self-inflicted injury and initially believed he had only brushed his nail gun against his head.
The 32-year-old, who is recovering in hospital, even continued doing handiwork around his Chicago home for the rest of the day and chatted to his family.
But he was taken to hospital the following afternoon after waking up from a nap feeling ill.
An X-ray revealed the nail lodged in his brain – but Mr Autullo was still well enough to post an image of the scan on Facebook during an ambulance ride between hospitals.

Dante Autullo after he underwent surgery to remove the nail
Doctors explained the nail had barely missed the portion of the brain that controls motor function, meaning he was able to carry on with his day.
Although there are pain-sensitive nerves on a person's skull, there are none in the brain itself.
Following the surgery on Friday, Mr Autullo's wife Gail Glaenzer, with whom he has four children, said: "He feels good. He moved all his limbs, he's talking normal, he remembers everything.
"It's amazing, a miracle."