IELTS Reading 42: Reading the Mind's Movements

Adapted from Neuralink / clinical trial reports (2025-2026). IELTS Reading Section 3 difficulty, approximately 1,050 words. Source: https://neuralink.com/updates/two-years-of-telepathy/

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Reading Passage

A. The image is as old as science fiction: a person trapped inside an unmoving body, able to think but not to speak or reach out, who simply by willing it moves a cursor on a screen or speaks through a synthesised voice. For people left paralysed by a spinal-cord injury or by the gradual decay of motor neurons in a disease such as ALS, that image is not fantasy but a daily prison — locked in, aware of everything, unable to turn the page, call a relative, or feed themselves without another's help. Brain-computer interfaces, or BCIs, are the technology that promises to unlock the door. The ambition has moved, within the last few years, from cramped laboratory demonstrations to real patients using implantable devices at home, carrying on a conversation, controlling a television, or simply ordering a cup of tea through an assistant — yet the reality, as so often, is both more modest and more remarkable than the headlines suggest. The systems do not read minds. They read one very specific kind of intention and, slowly, are learning to do it well enough that a person who once could only blink might soon hold a normal conversation again.

B. A BCI works by intercepting the commands the brain sends out for the muscles and routing them, bypassing the broken wires, to a machine. A tiny array of electrodes, placed in the motor cortex — the strip of brain that plans hand and arm movements — listens to the electrical chatter of thousands of neurons firing at once. Software decodes the pattern as an intention: to move the cursor left, to click, to spell a particular letter. With practice, the patient learns to modulate those signals at will, and the decoder learns the individual's personal neural code, which is different for everyone and must be taught rather than assumed. Crucially, the device does not eavesdrop on thoughts, memories or feelings. It cannot tell what someone is imagining or remembering; it reads, at most, the deliberate effort to move a phantom hand, and turns that effort into a digital command. The line between "reading the mind" and "reading a movement signal" is the line between myth and engineering, and it is a line the more careful engineers insist on drawing whenever a headline threatens to blur it.

C. The early human results have been striking enough to justify the investment. In the first major trial of a wireless, high-channel implant, a patient paralysed from the neck down reached reliable cursor control within three days of turning the device on, and within a few weeks was composing text at several words a minute; later trials pushed that to around fifteen words a minute at a high rate of accuracy, and patients went on to spend more than a hundred hours a week using the system at home, browsing the internet, playing simple games and drawing on screen without a carer to assist. Earlier, bulkier systems with far fewer electrodes had managed roughly half that speed and demanded an umbilical cable through the skull, tethering the patient to the wall and confining them to the laboratory. The new implant, about the size of a coin and holding over a thousand electrodes, sits wirelessly under the skin, recharged through the scalp, and a surgical robot has placed it without the hand tremor that older, hand-held surgery risked.

D. For all the progress, the hard problems have not disappeared. Electrodes embedded in living tissue do not stay perfectly still. The body heals around them, laying down a thin layer of scar tissue that gradually muffles the signal, and the tiny wires drift over months, so that the decoder must be recalibrated or the data slowly degrades, a nuisance that no amount of clever software has yet abolished. Long-term biocompatibility — a device that remains safe and quiet in the brain for years rather than months — is an unsolved problem that only time, and more implants, will answer. The data itself raises uncomfortable questions too: a stream of neural activity is deeply personal, almost an outline of a person's intentions, and who owns, secures and can eavesdrop on it is only beginning to be debated, alongside fears of coercion or manipulation. The trials still involve a handful of highly selected patients, not thousands, and every claim of a medical revolution rests on those few shoulders, whose lives have been transformed but whose numbers are too small to settle the broader question of how well the technology scales.

E. What makes the field feel different from earlier attempts is the brain's own adaptability. Rather than demanding that the body conform to a rigid machine, engineers now let the decoder and the patient's brain learn each other, a partnership that exploits the nervous system's lifelong ability to rewire itself around new inputs. The same adaptability hints at wider futures — systems for people who have lost the power of speech through stroke or motor-neuron disease, and experimental implants that attempt to generate a crude kind of vision for the blind by stimulating the visual cortex. Yet the responsible reading of today's results is narrow and careful: a handful of paralysed people have regained a measure of independence, and that is a genuine, if quiet, revolution in its own right. The fantasy of uploading the human mind or controlling the whole world by thought remains elsewhere, for now. What the next years will decide is whether a few restored people become a dependable medical therapy — whether the reading of the mind's smallest movements can become, like a hearing aid, an ordinary and widely used tool, rather than a spectacle reserved for the luckiest few.

Questions 1-4

Choose the correct heading for paragraphs B, C, D and E from the list of headings below.

List of Headings i. How the device intercepts motor commands without reading thoughts ii. The results of the first human trials iii. The medical history of ALS iv. The stubborn engineering and ethical problems v. Why the brain's adaptability changes the picture vi. How to build a better surgical robot vii. The future of computer games

1. Paragraph B: ____
2. Paragraph C: ____
3. Paragraph D: ____
4. Paragraph E: ____

Questions 5-8

Choose the correct letter, A, B, C or D.

5. What does a current BCI actually read? A. A person's private thoughts and memories. B. Signals from the motor cortex corresponding to intended movement. C. Dreams the patient has at night. D. Emotional states such as fear.

6. What did the first major trial achieve? A. Full walking again. B. Reliable cursor control within days and text composition within weeks. C. The ability to fly a drone by thought. D. Restoration of sight.

7. Why does the signal degrade over months? A. The battery runs out too quickly. B. Scar tissue forms and electrodes drift, muffling the signal. C. The patient forgets how to use it. D. The software is deleted.

8. What does the writer say about the trials? A. They involved thousands of patients. B. They still involve only a small number of highly selected patients. C. They have already been banned. D. They were conducted on animals only.

Questions 9-13

Do the following statements agree with the claims of the writer?

Write:

• TRUE if the statement agrees with the information
• FALSE if the statement contradicts the information
• NOT GIVEN if there is no information on this

9. The new implant has over a thousand electrodes.
10. A BCI can currently read a person's secret memories.
11. Patients used the systems at home for many hours each week.
12. The body's healing response helps to strengthen the electrode signal.
13. Neuralink's implant was invented in 1999.

Questions 14-15

Complete the summary below using NO MORE THAN TWO WORDS from the passage.

The implant sits in the motor (14) __________ and decodes the patient's intention to move. Because electrodes drift and the body lays down scar tissue, the decoder must be periodically (15) __________.

Answers & Explanations

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