You should spend about 20 minutes on Questions 1–14, which are based on the reading
passage below.
Write answers to questions in boxes 1-14 on your answer sheet.
Tickling and Laughter
A. The fingers of an outstretched aim are nearing your body; you bend away folding your
torso, bending your head to your shoulder in hopes that you don’t get tickled; but the
inevitable occurs: yon arc tickled and in hysterics you chuckle, titter, and burst into
uncontrollable laughter. Why do we laugh when we are tickled?
B. Tickling is caused by a light sensation across our skin. At times the light sensation can
cause itching; however, most of the time it causes giggling. If a feather is gently moved
across the surface of the skin, it can also cause tickling and giggling. Heavy laughter is caused
by someone or something placing repeated pressure on a person and tickling a particular
area. The spots tickled often are feet, toes, sides, underarms, and neck which cause a great
deal of laughter. Yngve Zotterman from Karolinska Institute has found that tickling
sensations involve signals from nerve fibers. These nerve fibers are associated with pain and
touch. Also, Zotterman has discovered tickling sensations to be associated not only with
nerve fibers but also with sense of touch because people who have lost pain sensations still
laugh when tickled. But really, why do we laugh? Why are we not able to tickle ourselves?
What part of the brain is responsible for laughter and humor? Why do we say some people
have no sense of humor?
C. Research has shown that laughter is more than just a person’s voice and movement and
that it requires the coordination of many muscles throughout the body. Laughter also
increases blood pressure and heart rate, changes breathing, reduces levels of certain
neurochemicals (catecholamines, hormones) and provides a boost to dying immune system.
Can laughter improve health? It may be a good way for people to relax because muscle
tension is reduced after laughing. Human tests have found some evidence that humorous
videos and tapes can reduce feelings of pain, prevent negative stress reactions and boost
the brain’s biological battle against infection.
D. Researchers believe we process humor and laughter through a complex pathway of brain
activity that encompasses three main brain components. In one new study, researchers used
imaging equipment to photograph die brain activity of healthy volunteers while they
underwent a sidesplitting assignment of reading written jokes, viewing cartoons from The
New Yorker magazine as well as “The Far Side” and listening to digital recordings of laughter.
Preliminary results indicate that the humor-processing pathway includes parts of the frontal
lobe brain area, important for cognitive processing the supplementary motor area,
important for movement; and the nucleus accumbens, associated with pleasure.
Investigations support the notion that parts of the frontal lobe are involved in humor.
Subjects’ brains were imaged while they were listening to jokes. An area of the frontal lobe
was activated only when they thought a joke was funny. In a study that compared healthy
individuals with people who had damage to their frontal lobes, the subjects with damaged
frontal lobes were more likely to choose wrong punch lines to written jokes and didn’t laugh
or smile as much at funny cartoons or jokes.
E. Even though we may know more about what parts of the brain are responsible for
humor, it is still hard to explain why we don’t laugh or giggle when we tickle ourselves.
Darwin theorized within “The Expressions of the Emotions in Man and Animals” that there
was a link between tickling and laughter because of the anticipation of pleasure. Because
we cannot tickle ourselves and have caused laughter, Darwin speculated surprise from
another person touching a sensitive spot must have caused laughter. Some scientists
believe that laughing caused by tickling is a built-in reflex even babies have. If we tickle
ourselves in the same spot as our friend tickled us, we do not laugh as we did previously.
The information sent to our spinal cord and brain should be exactly the same. Apparently,
for tickling to work, the brain needs tension and surprise. When we tickle ourselves, we
know exactly what will happen…there is no tension or surprise. How the brain uses this
information about tension and surprise is still a mystery, but there is some evidence that
the cerebellum may be involved. Because one part of the brain tells another: “It’s just you.
Don’t get excited”. Investigations suggest that during self-tickling, the cerebellum tells an
area called the somatosensory cortex what sensation to expect, and that dampens the
tickling sensation. It looks as if the killjoy is found in the cerebellum. Further explorations
to understand tickling and laughter were conducted by Christenfeld and Harris. Within
‘The Mystery of Ticklish Laughter and “Can a Machine Tickleyn they explained that people
laughed equally whether tickled by a machine or by a person. The participants were not
aware that who or what was tickling them. However, the laughter was equally resounded. It
is suggested that tickling response is a reflex, which, like Darwin suggested earlier, is
dependent on the element of surprise.
F. Damage to any one part of the brain may affect one’s overall ability to process humor.
Peter Derks, a professor of psychology, conducted his research with a group of scientists
at NASA-Langley in Hampton. Using a sophisticated electroencephalogram (EEG), they
measured the brain activity of 10 people exposed to humorous stimuli. How quickly our
brain recognizes the incongruity that deals with most humor and attaches an abstract
meaning to it determines whether we laugh. However, different people find different jokes
funny. That can be due to a number of factors, including differences in personality,
intelligence, mental state and probably mood. But according to Derks, the majority of
people recognize when a situation is meant to be humorous. In a series of experiments, he
noticed that several patients recovering from brain injuries could not distinguish between
something funny and something not.
G. Dr. Shibata of the University of Rochester School of Medicine said our neurons get
tickled when we hear a joke. The brain’s ‘Tunny bone” is located at the right frontal lobe
just above the right eye and appears critical to our ability to recognize a joke. Dr. Shibata
gave his patients MRI scans to measure brain activity, trying to find out what part of the
brain is particularly active while telling the punch line of a joke as opposed to the rest of
the joke and funny cartoons in comparison to parts of the cartoons that are not funny. The
jokes “tickled” the frontal lobes. The scans also showed activity in the nucleus accumbens,
which is likely related to our feeling of mirth after hearing a good joke and our “addiction”
to humor. While his research was about humor, the results could help lead to answers and
solutions to depression. Parts of the brain that are active during humor are actually
abnormal in patients with depression. Eventually, brain scans might be used to assess
patients with depression and other mood disorders. The research may also explain why
some stroke victims lose their sense of humor or suffer from other personality changes.
The same part of the brain is also associated with social and emotional judgment and
planning.
Questions 1-7
The Reading Passage has 7 paragraphs, A-G.
Which paragraph contains the following information?
Write the appropriate letter, A-G, in boxes 1-7 on your answer sheet.
NB you may use any letter more than once.
1. Location of a brain section essential to the recognition of jokes
2. Laughter enhances immunity
3. Individual differences and the appreciation of humour
4. Parts of the brain responsible for tickling reflex
5. Neuropsychological mechanisms by which humor and laughter work
6. The connection between tickling and nerve fibers
7. Patients with emotional disorders
Questions 8-11
Look at the following researchers (listed 8-11) and findings (listed A-F).
Match each researcher with the correct finding(s).
Write your answers in boxes 8-11 on your answer sheet.
NB There are more findings than researchers.
You may choose more than one finding for any of the researchers.
A. The surprise factor, combined with the anticipation of pleasure, cause laughter when tickled.
B. Laughing caused by tickling is a built-in reflex even babies have.
C. People also laugh when tickled by a machine if they are not aware of it.
D. People have different tastes for jokes and humour.
E. Jokes and funny cartoons activates the frontal lobes.
F. Tickling sensations involve more than nerve fibers.
8. Darwin
9. Christenfeld and Harris
10. Yngve Zotterman
11. Peter Derks
Questions 12-14
Complete the summary below using NO MORE THAN THREE WORDS from the
passage for each blank.
Write your answers in boxes 12-14 on your answer sheet.
Researchers believe three brain components to be involved in the processing
of humor and laughter Results from one study using brain 12 …………...… indicate
that parts of the brain responsible for 13 …………...… movement and pleasure are
involved through a sophisticated pathway. Test subjects who suffered from
frontal lobes damages had greater chances of picking 14 …………...… of jokes or
did not respond to funny cartoons or jokes.
