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Sense Perception in Buddhist Philosophy and Neuroscience

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by Dr Channa Ratnatunga

This is the third article of pre-poya publications in the newspapers appearing on April 30th, and the 3rd of July. Some degree of conversance with previous articles would be useful. Some overlap with them also was inevitable.

Sense-awareness- Vedanakhandha.

Neuroscience has shown that individual sense- reception (including that of the mind) triggers, by ‘illumination’, the respective neuronal network of the hind-brain and the cerebral cortex responsible sense-specific reception. This it does by the release of specified neuro-transmitters.

Diagram of the emotional Brain

The thalamus (See figure of brain above) in the primitive basal brain is the relay center for all the senses (except smell) and processes the information for distribution to the appropriate cortical areas of the brain. No two sense triggers and their neuronal response can occur together even if their reception is at the related sense organs at the same time, e.g. hearing and seeing a band at play.

These are compared metaphorically, to a stone dropped into tranquil pond (Bhavanga-an ever flowing life-continuum) leading to ripples described as vibrations, of the respective sensation (Bhavanga-calana) and which abruptly arrests (Bhavanga-upaccheda), but comes to its original quiescent state ( Bhavanga-Uppada) before the next sense trigger comes. This act takes place in Nano-seconds if not faster. This is a very important reality in the Buddhist philosophy of sense reception, as it includes the arising of that sense consciousness-vinnana, leading to awareness or contact phassa of the combined stimulus- or trigger. This is- Vedanakhandha.

Perception- Sannakhandha

The ‘Being’ (i.e. Panchaskhandha) is the ‘interpreter’ of the combined sense stimulus. This is the act of ‘Perception- Sannakhandha’. That these sense triggers, activate the brain’s neuronal networks investigating the input, with past experience. Depending on the nature of the combined sense stimulus, it could evoke a neutral, pleasurable or a non-pleasurable feeling. This occurs at extreme speeds of neuronal transmission and is reflected in the concept of ‘thought moments’ 1-8, as described in the Abhidhamma.

Response to contact could be variable but, extremely rapid and leads to thought moments 9-15. The response is governed by state of mind cetana –Sankharakhandha , of the ‘self’ at the moment. The ‘Self’ is an ever-evolving experience induced, construct by neuroplasticity of the brain focused on its basic need to secure survival and procreative rights of the ‘Being’.

Neuronal backgrounds to the response Sankharakhandha are protean. The primitive man or an uneducated ‘being’ would respond with his basal instinctual survival reflexes arising in the basal brain, (i.e. the hypothalamus-pituitary-adrenal axis also called the Reptilian brain). The fight or flight response unmasking Gathi, which are, it is claimed, pre-dispositions, conditioned by Kamma of previous lives and life experience in this life so far.

As a social species, humans have learnt to Auto-regulate their primal instincts (such as the Freudian concept of Id) ingrained, structurally and functionally, to gain acceptance while living in the herd. Hence there occurs a reciprocal facilitation by neuroplasticity of the neuronal tracts in the brain. They undergo changes that are conducive to such social acceptance within the herd. A process learnt in the years growing up, which results in neuroplastic changes, between the pre-fronto-medial cortex of the brain and the Amygdala (locus of emotion) of the pre-mammalian brain (emotional brain) through a connection referred as the Uncinnate Fasciculus of the brain. See figure below.

Fig: Uncinnate Fasciculus of White Matter Tract connecting The Prefrontal lobe and the primitive brain, i.e. Amygdala, Hippocampus.
The auto-regulatory tracts

The more educated one gets the perceptive memories one relates to before making a decision expands. Begins to lose tribalism, adopts a more global attitude, hence brings forth ‘morally wise’ decisions. These paths become ingrained by auto-regulation in the dorso-lateral prefrontal cortex of the brain by neuroplasticity with time. The Freudian Ego however remains indulging in mental fabrications such as, self-ranking with peers, imaginings – mannana like; clinging-tanha, conceit-manas and wrong views –meicha ditti. These ruminations-papanya of self-referenced thinking are thoughts arising in the Default Mode Network of the brain.

Contemplating the self; the underlying need for its arising i.e. for survival, its origins in neuro-plasticity and hence its impermanence, its role in creating Kamma, by Vipassana Bhavana will go a long way in eradicating this personality belief, i.e. of a Self. This leads to becoming aware of the reality of Anatta.

The Arahat mind, has got over all these Kamma generating fetters-kilesas by Vipassana meditation, though yet living among the herd. Not reacting to sense triggers, always living in the present moment, he/she does not create Kamma. The Arahat delinks the ever-present, ever active Wheel of life- Paticca Samuppada, attenuating the Default Mode Network of the brain, hence rebirth.



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South’s ‘structural deficiencies’ and the onset of crippled growth

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In need of empowerment: The working people of the African continent.

The perceptive commentator seeking to make some sense of social and economic developments within most Southern countries today has no choice but to revisit, as it were, that classic on post-colonial societies, ‘The Wretched of the Earth’ by Frantz Fanon. Decades after the South’s initial decolonization experience this work by the Algerian political scientist of repute remains profoundly relevant.

The fact that the Algeria of today is seeking accountability from its former colonizer, France, for the injustices visited on it during the decades of colonial rule enhances the value and continuing topicality of Frantz’s thinking and findings. The fact that the majority of the people of most decolonized states are continuing to be disempowered and deprived of development should doubly underline the significance of ‘The Wretched of the Earth’ as a landmark in the discourse on Southern questions. The world would be erring badly if it dismisses this evergreen on decolonization and its pains as in any way outdated.

Developments in contemporary China help to throw into relief some of the internal ‘structural deficiencies’ that have come to characterize most Southern societies in current times. However, these and many more ‘structural faults’ came to the attention of the likes of Fanon decades back.

It is with considerable reservations on their truthfulness that a commentator would need to read reports from the US’ Office of the Director of National Intelligence (ODNI) on developments in China, but one cannot approach with the same skepticism revelations on China by well-known media institutions such as Bloomberg News.

While an ODNI report quoted in this newspaper on March 25th, 2025, elaborated on the vast wealth believed to have been amassed by China’s contemporary rulers and their families over the years, Bloomberg News in a more studied manner said in 2012, among other things, on the same subject that, ‘Xi’s extended family had amassed assets totaling approximately $376 million, encompassing investments in sectors like rare earth minerals and real estate. However, no direct links were established between these assets and Xi or his immediate family.’

Such processes that are said to have taken hold in China in post- Mao times in particular are more or less true of most former colonies of the South. A clear case in point is Sri Lanka. More than 75 years into ‘independence’ the latter is yet to bring to book those sections of its ruling class that have grown enormously rich on ill-gotten gains. It seems that, as matters stand, these sections would never be held accountable for their unbounded financial avarice.

The mentioned processes of exploitation of a country’s wealth, explain in considerable measure, the continuing underdevelopment of the South. However, Fanon foresaw all these ills and more about the South long ago. In ‘The Wretched of the Earth’ he speaks insightfully about the ruling classes of the decolonized world, who, having got into the boots of the departing colonizers, left no stone unturned to appropriate the wealth of their countries by devious means and thereby grow into the stratum described as ‘the stinking rich.’

This is another dimension to the process referred to as ‘the development of underdevelopment.’ The process could also be described as ‘How the Other Half Dies’. The latter is the title of another evergreen piece of research of the seventies on the South’s development debacles by reputed researcher Susan George.

Now that the Non-aligned Movement is receiving some attention locally it would be apt to revisit as it were these development debacles that are continuing to bedevil the South. Among other things, NAM emerged as a voice of the world’s poor. In fact in the seventies it was referred to as ‘The trade union of the poor.’ Accordingly, it had a strong developmental focus.

Besides the traditional aims of NAM, such as the need for the South to keep an ‘equidistance’ between the superpowers in the conduct of its affairs, the ruling strata of developing countries were also expected to deliver to their peoples equitable development. This was a foremost dimension in the liberation of the South. That is, economic growth needed to be accompanied by re-distributive justice. In the absence of these key conditions no development could be said to have occurred.

Basing ourselves on these yardsticks of development, it could be said that Southern rulers have failed their peoples right through these decades of decolonization. Those countries which have claimed to be socialistic or centrally planned should come in for the harshest criticism. Accordingly, a central aim of NAM has gone largely unachieved.

It does not follow from the foregoing that NAM has failed completely. It is just that those who have been charged with achieving NAM’s central aims have allowed the Movement to go into decline. All evidence points to the fact that they have allowed themselves to be carried away by the elusive charms of the market economy, which three decades ago, came to be favoured over central planning as an essential of development by the South’s ruling strata.

However, now with the returning to power in the US of Donald Trump and the political Right, the affairs of the South could, in a sense, be described as having come full circle. The downgrading of USAID, for instance, and the consequent scaling down of numerous forms of assistance to the South could be expected to aggravate the development ills of the hemisphere. For instance, the latter would need to brace for stepped-up unemployment, poverty and social discontent.

The South could be said to have arrived at a juncture where it would need to seek ways of collectively advancing its best interests once again with little or no dependence on external assistance. Now is the time for Southern organizations such as NAM to come to the forefront of the affairs of the South. Sheer necessity should compel the hemisphere to think and act collectively.

Accordingly, the possibility of South-South cooperation should be explored anew and the relevant institutional and policy framework needs to be created to take on the relevant challenges.

It is not the case that these challenges ceased to exist over the past few decades. Rather it is a case of these obligations being ignored by the South’s ruling strata in the belief that externally imposed solutions to the South’s development questions would prove successful. Besides, these classes were governed by self- interest.

It is pressure by the people that would enable their rulers to see the error of their ways. An obligation is cast on social democratic forces or the Centre-Left to come to center stage and take on this challenge of raising the political awareness of the people.

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Pilot error?

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Wreckage of the trainer jet that crashed in Wariyapola recently

On the morning of 21 March, 2025, a Chinese-built K-8 jet trainer aircraft of the Sri Lanka Air Force (SLAF) crashed at Wariyapola. Fortunately, the two pilots ejected from the aircraft and parachuted down to safety.

A team of seven has been appointed to investigate the accident. Their task is to find the ‘cause behind the cause’, or the root cause. Ejecting from an aircraft usually has physical and psychological repercussions. The crew involved in the crash are the best witnesses, and they must be well rested and ready for the accident inquiry. It is vital that a non-punitive atmosphere must prevail. If the pilots believe that they are under threat of punishment, they will try to withhold vital information and not reveal the truth behind what happened, prompting their decision to abandon the stricken aircraft. In the interest of fairness, the crew must have a professional colleague to represent them at the Inquiry.

2000 years ago, the Roman philosopher Cicero said that “To err is human.” Alexander Pope said, “To err is human. To forgive, divine.” Yet in a Royal Air Force (RAF) hangar in the UK Force (RAF) hangs a sign declaring: “To err is human. To forgive is not RAF policy” These are the two extremes.

Over the years, behavioural scientists have observed that errors and intelligence are two sides of the same coin. In other words, an intelligent human being is liable to make errors. They went on to label these acts of omission and commission as ‘Slips, Lapses, Mistakes and Violations’.

To illustrate the point in a motoring context, if one was restricted to driving at a speed limit of 100 kph along an expressway and the speed crept up to 120 kph, then it is a ‘Slip’ on one’s part. If you forgot to fasten the seatbelt, it is a ‘Lapse’. While driving along a two-lane road, if a driver thinks in his/her judgement that the way is clear and tries to overtake slower traffic on the road, using the opposite lane, then encounters unanticipated opposite traffic and is forced to get back to the correct lane, that is a ‘Mistake’. Finally, if a double line is crossed while overtaking, while aware that the law is being broken, that is labelled as a ‘Violation’. In theory, all of the above could be applied to flying as well.

In the mid-Seventies, Elwyn Edwards and Frank Hawkins proposed that good interaction between Software (paperwork), Hardware (the aircraft and other machines), Liveware (human element) and the (working) environment are the essentials in safe flight operations. Labelled the ‘SHELL’ concept, it was adopted by the International Civil Aviation Organisation. (ICAO). (See Diagram 01)

In diagram 01, two ‘L’s depict the ‘Liveware’, inside and outside an aircraft flightdeck. The ‘L’ at the centre is the pilot in command (PIC), who should know his/her strengths and weaknesses, know the same of his/her crew, aircraft, and their mission, and, above all, be continuously evaluating the risks.

Finally, Prof. James Reason proposed the Swiss Cheese Theory of Accident Causation. (See Diagram 02)

From this diagram we see that built in defences in a system are like slices of Swiss cheese. There are pre-existing holes at random which, unfortunately, may align and allow the crew at the ‘sharp end’ to carry out a procedure unchecked.

Although it is easy and self-satisfying to blame a crew, or an individual, at an official accident investigation, what should be asked, instead, is why or how the system failed them? Furthermore, a ‘just culture’ must prevail.

The PIC and crew are the last line of defence in air safety and accident prevention. (See Diagram 3)

A daily newspaper reported that it is now left to be seen whether the crash on 21 March was due to mechanical failure or pilot error. Why is it that when a judge makes a wrong judgement it is termed ‘Miscarriage of Justice’ or when a Surgeon loses a patient on the operating table it is ‘Surgical Misadventure’, but when a pilot makes an honest error, it is called ‘Pilot Error’? I believe it should be termed ‘Human Condition’.

Even before the accident investigation had started, on 23 March, 2025, Minister of Civil Aviation, Bimal Ratnayake, went on record saying that the Ministry of Defence had told him the accident was due to an ‘athweradda’ (error). This kind of premature declaration is a definite ‘no-no’ and breach of protocol. The Minister should not be pre-empting the accident enquiry’s findings and commenting on a subject not under his purview. Everyone concerned should wait for the accident report from the SLAF expert panel before commenting.

God bless the PIC and crew!

– Ad Astrian

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Thai scene … in Colombo!

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Yes, it’s happening tomorrow, Friday (28th), and Saturday (29th,) and what makes this scene extra special is that you don’t need to rush and pack your travelling bags and fork out a tidy sum for your airfare to Thailand.

The Thai Street Food Festival, taking place at Siam Nivasa, 43, Dr. CWW Kannangara Mawatha, Colombo 7, will not only give you a taste of Thai delicacies but also Thai culture, Thai music, and Thai dancing.

This event is being organised by the Thai Community, in Sri Lanka, in collaboration with the Royal Thai Embassy in Colombo.

The Thai Community has been very active and they make every effort to promote Amazing Thailand, to Sri Lankans, in every possible way they can.

Regarding the happening, taking place tomorrow, and on Saturday, they say they are thrilled to give Sri Lankans the vibrant Thai Street Food Festival.

Explaining how Thai souvenirs are turned out

I’m told that his event is part of a series of activities, put together by the Royal Thai Embassy, to commemorate 70 years of diplomatic relations between Thailand and Sri Lanka.

At the Thai Street Food Festival, starting at 5.00 pm., you could immerse yourself in lively Thai culture, savour delicious Thai dishes, prepared by Colombo’s top-notch restaurants, enjoy live music, captivate dance performances, and explore Thai Community members offering a feast of food and beverages … all connected with Amazing Thailand.

Some of the EXCO members of the Thai Community, in Sri Lanka,
with the Ambassador for Thailand

I’m sure most of my readers would have been to Thailand (I’ve been there 24 times) and experienced what Amazing Thailand has to offer visitors … cultural richness, culinary delights and unique experiences.

Well, if you haven’t been to Thailand, as yet, this is the opportunity for you to experience a little bit of Thailand … right here in Colombo; and for those who have experienced the real Thailand, the Thai Street Food Festival will bring back those happy times … all over again!

Remember, ENTRANCE IS FREE.

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