Some reasoning
"There are 40,000 nerve cells in the heart as well as neurotransmitters such as noradrenaline and dopamine (known emotional mediators), that the heart synthesizes and releases. "With every beat of the heart, a burst of neural activity is relayed to the brain," Martin explains. "The heart senses hormonal, [heart] rate and pressure information, translates it into neurological impulses and processes this information."
- Pam Montgomery
other...
Completely independently of such heart transplant experiences, Dr Andrew Armour Ph.D. is a heart specialist who had noticed the presence of neurons in the heart – he noted a sophisticated collection of these and learned that the heart contains a complex nervous system of its own. He soon realised that there is a more intimate connection between the heart and brain than had previously been known or understood. Indeed, the doctor claims that the heart actually sends more information to the brain than the other way around! Dr Armour has written a pamphlet called, Anatomical and Functional Principles. His publisher makes the following comment about this writing:
'Groundbreaking research in the field of neurocardiology has established that the heart is a sensory organ and a sophisticated information encoding and processing center, with an extensive intrinsic nervous system sufficiently sophisticated to qualify as a "heart brain" .... Armour discusses intriguing data documenting the complex neuronal processing and memory capabilities of the intrinsic cardiac nervous system, indicating that the heart brain can process information and make decisions about its control independent of the central nervous system. By providing an understanding of the elaborate anatomy and physiology of the cardiac nervous system, this monograph contributes to the newly emerging view of the heart as a complex, self-organized system that maintains a continuous two-way dialogue with the brain and the rest of the body.(source:
http://www.heartmath.org/research/e-books/index.html)
Professor Paul Pearsall Ph.D. has also made a contribution to the new discussion of the intelligence of the human heart. After interviewing nearly 150 heart and other organ transplant recipients, Pearsall proposed the once staggering concept that cells of living tissue could have the capacity to remember.
"...Paul Pearsall is one of many researchers who has observed that transplant patients who receive an organ from another person's body may also receive much more -- what he calls their "cellular memories." Recipients have reported inheriting everything from the donor's food cravings to knowledge about his murderer -- information that in one case led to the killer's arrest. As a result of these and other researchers' findings, Pearsall is now convinced that the heart has its own form of intelligence, that we are only rarely aware of in modern life. In his view, the heart processes information about the body and the outside world through an "info-energetic code" -- a profuse network of blood vessels and cells that serves not only as our circulatory system but as an energy information gathering and distribution system, much like a complex telephone network. What's more, he believes that the soul, at least in part, is a set of cellular memories that is carried largely by our hearts. Predictably, such views have met with opposition in the medical world. But in his view, the implications of his theories -- that the heart "thinks," cells remember, and communication can therefore transcend the boundaries of time and space -- are too important for him to dismiss."
Of course, much of mainstream science remains sceptical about the newly discovered powerful links between the brain and the heart. Why is this? This is largely because mainstream science mostly works through a system of theories which have been proposed, whereas this new line of research has mostly (though not entirely) come about because of the sudden production of enormous and unanticipated evidence from recipients of donated organs. Despite this, more scientists are regularly joining this exciting new area of research and even Britain's foremost heart transplant doctor, Professor Sir Magdi Yacoub (in the televised channel 4 programme), while being guarded in his comments, nevertheless welcomed the new area of research, although, of course, the professor is typical of a long line of heart specialists who have only seen the human heart as a pumper of blood.
However, the extensive research of Armour and others show that there can now be no going back – we can all now state quite dogmatically that the relationship between the heart and brain has been hugely underestimated and that the heart contains more brain-like capacities than anyone would have thought just a very few years ago. There is an inter-change between heart and brain with the brain actually receiving more information from the heart than vice versa. No one would have believed this only 5-10 years ago! Armour's separate and unassociated area of research to the 'transplanted memory' phenomenon has shown that there is no biological reason why the heart cannot store memories, thoughts and passions.
This means that the biblical concept that the heart is the seat of one's soul , intellect and character can no longer be taken as a purely poetic/romantic writing idiom.
Robin A. Brace, 2006.