...but it's a little more than what people generally think and ESP type activities is something other than what the scientific community has defined it to be. Let's take the latter and think...really think hard about the definition of ESP.
ESP is supposedly this non physical means of communication not involving our normal senses. Define non physical and I will show you nothing, for nothing is the only 'thing' to truly define what is non physical. All substances are physical and all behavior has a physiology behind it, including ESP activity.
Sleep paralysis, from what I've experienced starting 26 years ago, seems to hold a 'key' into ESP activity...explaining the hows and whys behind the perceptions and the perceptions are significant to the individual experiencing sleep paralysis or to someone they've been in close contact with.
There seems to be two important factors to ESP activity such as clairvoyance, telepathy and precognition, the scientific community has sorely overlooked and perhaps the very reason why all these experiments trying to prove ESP fail.
Factor one...physical contact. It can be direct or indirect, but physical contact is an absolute must between 'senders' and 'receivers'. Indirect would be like the passing of notes, such as money, mail and business cards. Touching something the other has also touched.
Factor two...an X degree of physical loss. The greater the physical loss, the greater the expansions of ESP activity. It's like an automatic compensation the brain does when the body is at its most vulnerable to danger...usually during sleep, illness and injury.
The importance to understanding ESP activity ties to the medical benefits this could achieve. There are numerous illnesses without known causes, many of them capable of genetic mutation. There are also long standing mysteries of how DNA copy errors occur that create these genetic mutations. Understanding the neural communication pathways behind ESP activity could reveal the neural communication pathways of those with limited or uncontrolled mobility...or the lack of such as what is seen in Stephen Hawking with MND (???) and Michael J. Fox with Parkinson's Disease. It could lead into great advancements in spine injury treatments. It could also lead into understanding the finer lines between life and death and states of suspended animation as what is known with cataplexy, catalepsy and coma. These are extended sleep states where the brain literally puts life on hold regardless how brief or how long these states of suspended animation last per experience.
The unique thing about sleep paralysis is that the brain is literally stuck between two states of consciousness...REM sleep and wakefulness. There may well be neural pathways that are opened at the same time when one or more would otherwise be closed under normal circumstances. This could allow sensory impluses access to areas in the brain they would otherwise be restricted...such as...for example...maybe commands meant for the immune system being diverted to the thalami for sensory processing...especially for sight and audio...which is very common in claims of ESP activity. Imagine visualizing a command for the immune system to send out an attack on a foreign body or substance invading cells. Maybe this accounts for alien abduction like hallucinations during sleep paralysis. Alien...same as foreign...from elsewhere. Abduction...the taking away of...in this case...taking away the function of cells. That's just one example of one type of ESP activity.
Overall...in a nutshell, I hypothesize that ESP activity is metabolic in nature, is an instinctive response and an activity shared among all organisms.
There's some of my two sense. I've gathered way too much information to post here. Ask away...let the critics rip and the questions roll, but please keep it constructive.
Thanks