Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Sunday, 7 February 2010

A Significant Interaction

Cognitive Science feature written for BlueSci magazine Lent 10: www.bluesci.org/images/stories/pdf/BlueSci-issue_17.pdf













Cat Davies talks to Nicola Clayton, Professor of Comparative Cognition and Fellow at Clare College, about her collaboration with the Rambert Dance Company.

As academics we are by definition specialists. With sharp skills, wise decision-making and right-place right- time luck, we find a position within our chosen niche. And so our specialism becomes even more defined, like an ID tag on our careers.
But what happens if we have two specialisms? The typical route would be to concentrate on one whilst the other nestles in the wings. Nicky Clayton, professor of comparative cognition at the Department of Experimental Psychology and an accomplished dancer, has managed to blend her two passions in her current role as scientific advisor to the Rambert Dance Company.
Nicky’s day job focuses on social and physical cognition in corvids (rooks, jackdaws, and jays), as well as on the memory and executive skills of other bird families and apes. By night she dances, teaching tango and salsa, and still takes the occasional class in ballet and a weekly jazz workout. Her work with Rambert weaves together her previously separate lives into a tailor-made position.

Nicky’s dual roles are evident in her office, where richly coloured dance photographs bookend heavy psychology volumes. As she explains aspects of avian behaviour, she rises to illustrate her points. Within minutes, you can see the scientist as choreographer and the choreographer as scientist. Through talking to Nicky, you see how working at the frontiers of both science and the arts can create something useful, something beautiful, and can highlight parallels that smash the traditional arts versus science dichotomy.

Rambert is not the only dance company to seek the expertise of academics. The British company Random Dance works with Philip Barnard, of the Cognition and Brain Sciences Unit here in Cambridge, on synergies between choreographic processes and knowledge of cognitive neuroscience. So why should dance companies need scientific advisors? Dance productions draw inspiration from here and there – folk tales and mythology, historical events, great works of literature. Nature is a common theme, and there lies the need for an advisor who can explain precisely how a swan glides around a lake or (with some creative input) how a mouse king does battle.

Rambert’s latest project is The Comedy of Change, inspired by Darwin’s theories of natural and sexual selection. Through a hawk-eyed sensitivity for opportunity and an instant connection with Mark Baldwin, artistic director of the company and choreographer of Comedy, Nicky has become deeply involved with the production. As she talks about the development of the show, she explains how the artistic collaboration differs from the way teamwork unfolds in her scientific life.

“There are a lot more people involved,” she says, indicating the many facets in transforming a creative concept into a full stage production. Coupled with a more fluid structure than most university research teams, this means that Nicky’s roles are many and varied. From educational outreach, to working with the dancers and animateurs, liaising with financial backers and giving talks at the production, “the work feels a lot more diverse and a lot more outward-facing than typical scientific collaborations.”

Alongside the expected contrasts, there are many shared aspects between the artistic and scientific processes. Nicky points out that both animal cognition and dance share the challenge of conveying beautiful ideas and thoughts in the absence of language. Both Nicky, as professor of comparative cognition, and Baldwin, as world class choreographer, tease this out by capitalizing on movement; “The main difference is that my subjects have feathers and no hands,” Nicky adds.

Where the choreographer deliberates over which movements are appropriate, the professor debates which tests are best for the job in hand. There are also parallels in the relationship between the subjects and the audience; “Choreographers create something for the audience’s pleasure, but it couldn’t possibly work if the dancers weren’t comfortable with the moves. As a scientist, I have to convince the readership that my experiments are well designed and my claims are realistic, but none of that would happen without the cooperation of the birds.”

One of the principal dancers in The Comedy of Change illustrates the overlap with stunning directness; his head and neck movements mimic the courtship dance of one of the six-plumed birds of paradise. In the forests of New Guinea, and now in British theatres, the male clears his dance space of all the leaves, rises up on his toes, and shimmies across the stage. The male with the best dance and the funkiest head movements not only gets the girl, but also the solo.

So how can dry old science ever compete with the arts for space in the public psyche? As a quick measure, a Google search for scientists Colin Blakemore or Jocelyn Bell Burnell throws up about 30,000 websites. Do the same for Michael Jackson and we get 4,000 times that amount. As much as Blakemore and Bell Burnell are big news in science, they don’t touch the everyday collective consciousness.

What Nicky is really championing is the idea that the arts really can fling open the doors to science. This year in Cambridge, we have had Darwinian music, painting, comedy, and even cookery. The Comedy of Change is the latest example of the arts popularising science. I ask Nicky whether audiences come to be educated as well as entertained. Her answer underlines the subtlety with which the production conveys the science; “Only if they want to be. First and foremost, Mark’s beautiful choreography is for the audience’s pleasure, but hopefully there might be a few ideas that might inspire.” Nicky goes on, characteristically drawing biological analogies; “Our aim is not to educate the public about Darwin’s ideas, it’s about sowing a few seeds. If the public wish to let those ideas germinate, then that will inspire them about Darwin.” Clearly, the project is not a scientific mission, but a means of exposing the public to ideas about life on earth.

Eminent professor, self-confessed bird-nerd and committed dancer, Nicky attributes her enviable energy levels to good maternal genes and a supportive husband; “I recharge by dancing. I’m doing something different. My brain isn’t thinking about science, it’s busy concentrating on something else so it gets a good rest and a break from the science.”

As a schoolgirl, Nicky’s reports warned that she “could do very well as long as she doesn’t burn herself out”. It seems unlikely. From blazing trails in academia to burning up dance floors, the researcher and dancer goes on creating. Like nature’s most harmonious symbioses, such ventures between the disciplines strengthen and nourish the other to ensure continued growth and survival.

The Comedy of Change continues its tour of the UK until 30 April 2010.


Thursday, 8 October 2009

Nasal cycling

Cognitive Science feature written for BlueSci magazine Easter 09: www.bluesci.org/images/stories/Issue_15.pdf

Nasal cycling - not an Olympic sport new for 2012, but the alternating dominance of each nostril. This is a physical phenomenon present in 85% of mammals – and that probably includes you. As we go about our business, one nostril is more open, allowing more air to flow through it than its resting partner. A few hours later, the open nostril rests and the other flares and takes control. Try it. Put a finger under your nose and you will feel a stronger, warmer sensation on one side. Remember to do it again later and you may well find the opposite.

Unsurprisingly, researchers have not been monitoring nasal cycling by sitting around with their fingers under each others’ noses. It has been studied in a number of ways: hot-wire anemometers (ouch) should perhaps remain unpacked; the Zwaardemaker method relies on a calibrated cold mirror and condensation, and a more recent technique involves participants exhaling onto a piece of glass with red dye and then observing the resultant ink bloom. The wonky love hearts which are left behind reveal a striking manifestation of our nasal asymmetry.

This alternating vasodilation and vasoconstriction of the nostrils was first documented by Kayser, a German rhinologist in 1895 and developed by Heetderks in 1927. It has since been embraced by yoga enthusiasts in the meditative practice of Pranayama. Research into nasal cycling was taken up with gusto by David Shannahoff-Khalsa at the University of California in the early 1990s leading to a number of publications, and has more recently been investigated in relation to handedness, autism and early language impairment.

So why this alternation? Looking elsewhere in the body may help explain. It has been suggested that brain lateralisation takes place to make maximum use of neural tissue, avoiding duplication of function. However, nostrils need not multitask, and do not wear out unless they have been regular conduits to substances other than air. The intriguing claim is that the nasal cycle is linked to the rhythm of alternating brain hemispheric activity, and governed by the autonomic nervous system (ANS). Using neural imaging techniques, positive correlations have been found between hemispheric activity and dominance in the opposite nostril. Surprisingly, the nose is called upon as an integral part of cognition!

We even do better in certain kinds of test when forced to breathe through the optimal nostril. Shannahoff-Khalsa and Susan Jella investigated performance in cognitive tests by forcing their undergraduates to breathe through either the left or the right nostril (crocodile-clips, anyone?). When taking the right-brain based spatial tasks, the students did significantly better during left-nostril breathing, whilst on the verbal tasks which are more closely associated with the left hemisphere, they scored higher during right nostril breathing but not significantly so (the asymmetry in significance in this case may be due to multiple brain regions mediating the skills required in the specific types of task).

Although we lag behind dolphins who have nailed the ability to let one half of their brains rest while the other keeps lookout for predators and takes charge of breathing, the evidence from nasal cycling research suggests that there may be some propensity for one side of the human brain to be more active whilst the other takes a back seat, regardless of the task at hand. Half-sleeping has been noted in other species too – we’ve all seen the ‘one-legged’ flamingo, with ducks, geese, storks and herons also making like Maasai tribesmen from time to time. Various theories abound, including the idea that these birds are resting one hemisphere at a time; the resting leg corresponding to the contralateral sleeping hemisphere. The other side supports the body and maintains a degree of alertness when the bird is in a vulnerable state. Evolutionarily, the theory is persuasive.

Although this private life of the nose initially sounds pretty weird, lateralisation of the body is widely observed. Whenever we pick up a pen, put the phone to our ear, cross our legs, interlace our fingers or tilt our heads to be kissed we are demonstrating the body’s inherent lopsidedness. Left- and right-brained tendencies are commonly cited to illustrate our strengths and weaknesses, and lateralisation of the brain is now a major topic within the cognitive sciences; there is even a cross-disciplinary international journal focused exclusively on lateralisation in human and non-human species.

Psychologists and linguists have studied brain regions and lesions in relation to language ability since the 19th century. Such research is widely respected, and what it has in common across the sub-disciplines is the top-down nature of brain governing body. So does our modest air-warming appendage really have the capacity to influence brain function? Shouldn’t it be the other way around? Not necessarily, considering that the ANS and the hypothalamus are ultimately in charge here. It appears that nostril dominance originates from the brain itself, and then in turn affects cortical activity. The evidence suggests that the ANS starts the race, the nostrils cycle and the brain follows behind.

So if the story of nasal cycling is true, how should we best harness it? Plug our left nostril during that work presentation? Stick a finger in the right side during the driving test? Market an airflow detection kit for task/ brain-optimisation? As it seems that achieving ambinasality is beyond us, perhaps we’ve just got to embrace the times when we’re down with a cold, for that is when we are truly cerebrally balanced.


References
Kayser, R. (1895) Die exakte Messung der Luftdurchgängigkeit der Nase. Arch. Laryng. Rhinol. (Berl.) 8, 101-120
Shannahoff-Khalsa, D. (1993) The ultradian rhythm of alternating cerebral hemispheric activity. Int. J. Neurosci. 70, 285-298
Jella S.A, Shannahoff-Khalsa D.S. (1993) The effects of unilateral forced nostril breathing on cognitive performance. Int J Neurosci. 73, 61-8