Head transplant
A head transplant is a surgical operation involving the grafting of an organism’s head onto the body of another. It should not be confused with another, hypothetical, surgical operation, the brain transplant. Head transplantation inevitably involves decapitating the patient. Although it has been successfully performed using dogs, monkeys and rats, no human is known to have undergone the procedure.
Since the technology required to reattach a severed spinal cord has not yet been developed, the subject of a head transplant would become quadriplegic unless proper therapies were developed. This technique has been proposed as possibly useful for people who are already quadriplegics and who are also suffering from widespread organ failures which would otherwise require many different and difficult transplant surgeries. It may also be useful for people who would rather be quadriplegic than dead. There is no uniform consensus on the ethics of such a procedure
Read more http://en.wikipedia.org/wiki/Head_transplant
Whole-body transplant
A whole-body transplant or brain transplant is a hypothetical operation that would move the brain of one being into the body of another. It is a procedure distinct from head transplant, which involves transferring the entire head to a new body, as opposed to the brain only. Theoretically, a person with advanced organ failure could be given a new and functional body while keeping their own personality and memories.
Historically, whole-body transplants have not been feasibile and were widely regarded as impossible. Today, given progress in organ transplant and human cloning research, many scientists hold that whole-body transplants are theoretically possible and likely to be feasibile in the future. Somebioethicists argue that there are difficult moral problems involved in either harvesting a brain-dead body, especially one deliberately created using human cloning, or otherwise acquiring a body (say, of a criminal due to be executed for a crime,] or an individual who is not dead but is soon to die of a brain-based illness).
Though not feasible at current levels of technology and scientific understanding, this and similar concepts have been explored in various forms of fiction.
Read more http://en.wikipedia.org/wiki/Whole-body_transplant
Exploding head syndrome
Exploding head syndrome is a parasomnia condition that causes the sufferer occasionally to experience a tremendously loud noise as originating from within his or her own head, usually described as the sound of an explosion, roar, gunshot, loud voices or screams, a ringing noise, or the sound of electrical arcing (buzzing).
This noise usually occurs within an hour or two of falling asleep, but is not necessarily the result of a dream and can happen while awake as well. While the sound is perceived as extremely loud, it is usually not accompanied by pain. Attacks appear to change in number over time, with several attacks occurring in a space of days or weeks followed by months of remission. Sufferers often feel a sense of fear and anxiety after an attack, accompanied by elevated heart rate. Attacks are also often accompanied by perceived flashes of light (when perceived on their own, known as a “visual sleep start”) or difficulty in breathing. The condition is also known as “auditory sleep starts”. It is not thought to be dangerous,although it is sometimes distressing to experience. Sufferers may experience an inability to vocalize any sound, or mild forms of sleep paralysis during an attack.
Read more http://en.wikipedia.org/wiki/Exploding_head_syndrome
Spot of fun with a Dash of Serious 