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Tuesday, 21/4/2026 | 09:06 GMT+7

How multitasking affects the brain

Regularly engaging in multiple tasks simultaneously forces the brain to constantly switch between them, potentially impacting concentration and the process of retaining information.

Many individuals have a habit of managing work while checking their phones, replying to messages, eating, or performing multiple tasks at once with the aim of increasing efficiency. This practice is known as multitasking.

Dr. Nguyen Huu Khanh, a neurologist at the Neuroscience Center, Tam Anh General Hospital TP HCM, explains that the human brain does not process many complex tasks simultaneously. Instead, it primarily switches rapidly between different tasks. Each such switch requires a brief period for the brain to reset its focus. This process consumes energy and impedes effective information processing. When information is not fully encoded, its ability to be stored in long-term memory decreases.

Multitasking also impacts the prefrontal cortex, the brain region responsible for executive function, concentration, and behavioral control. Overworking this region reduces attention span, often leading to experiences like "reading but not remembering" or "listening but not fully understanding."

Furthermore, constant interruptions from phone notifications, emails, or social media hinder the brain's ability to maintain sustained focus, consequently reducing learning and work efficiency.

Common symptoms of prolonged multitasking include difficulty remembering details, easily forgetting recently acquired information, inability to complete complex tasks, or needing to re-read multiple times to comprehend.

Individuals with memory impairment can be treated with transcranial magnetic stimulation. Photo: Tam Anh General Hospital

According to Dr. Khanh, in cases of poor concentration and memory impairment linked to stress, insomnia, or cognitive overload, doctors may consider supportive measures. One method currently used is repetitive transcranial magnetic stimulation (rTMS). This approach utilizes electromagnetic pulses to target brain regions involved in attention, memory, and emotional regulation, thereby supporting improvements in concentration and information processing efficiency.

rTMS is a non-invasive method that requires no anesthesia, with each treatment session lasting approximately 15-30 minutes. Physicians will personalize treatment protocols based on each patient's specific condition, especially if prolonged reduced concentration is accompanied by anxiety, stress, or sleep disturbances.

Individuals should prioritize single-tasking, minimize interruptions, ensure sufficient sleep, and maintain regular physical activity. If symptoms persist or significantly affect work, it is advisable to consult a neurological specialist for assessment and suitable intervention guidance.

Trong Nghia

Readers can submit questions about neurological diseases here for doctors to answer.
By VnExpress: https://vnexpress.net/lam-nhieu-viec-cung-luc-anh-huong-the-nao-den-nao-5064941.html
Tags: forgetfulness memory impairment

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