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Rachel V Thomas

Ever Wonder Why You Keep Scrolling Short Videos? Your Brain May Be Switching Off Self-Control

Are you someone who can spend hours scrolling through <span>short videos</span> on Instagram, YouTube or <span>TikTok</span>? A new study suggests that watching preferred short videos may temporarily quiet <span>brain</span> regions involved in self-control and monitoring, offering a possible clue to why it can be so hard to stop.

Short Videos May Quiet Brain’s Self-Control Network

The research, published in the journal <em><span rel="noindex">NeuroImage</span></em>, found that watching preferred short videos may temporarily suppress activity in parts of the brain involved in cognitive control. This effect may also be linked to levels of the brain chemical glutamate.

The study focused on the dorsal anterior cingulate cortex (dACC) and dorsolateral prefrontal cortex (dlPFC). Both are key regions of the cognitive control network, which becomes active during tasks that require mental effort, attention and self-regulation.

Researchers from Zhejiang University in China found that both the dACC and dlPFC showed significant deactivation when participants watched preferred videos to completion, compared with less-preferred videos that were stopped early.

The liked videos significantly reduced activity in both brain regions linked to cognitive control. When participants watched videos they chose to continue, activity in the dACC and dlPFC fell below normal resting levels.

However, disliked videos showed a different pattern. Activity in the dACC remained close to normal, while the dlPFC was still suppressed. Meanwhile, the visual cortex remained active during both types of videos, suggesting the changes were linked to the viewing experience rather than simply looking at a screen.

<h2>Glutamate May Influence How The Brain Responds</h2>

The small study of 56 participants also examined whether resting levels of two important brain chemicals could help explain differences in how participants’ cognitive control networks responded during short-video viewing.

Glutamate is the brain’s main excitatory neurotransmitter, helping increase neural activity. Gamma-aminobutyric acid (<span>GABA</span>) is the brain’s main inhibitory neurotransmitter, helping reduce or regulate neural activity.

The researchers found that resting-state glutamate levels in the dACC were associated with the extent of brain deactivation. Higher glutamate concentrations were linked to less suppression of activity in both the dACC and dlPFC.

Functional connectivity between the dACC and dlPFC also increased during video viewing, particularly when participants watched their preferred videos.

<h2>How Immersive Viewing Affects Brain</h2>

The researchers said the findings provide new evidence that immersive viewing of preferred short videos can deactivate the cognitive control network and that individual differences in this response may be linked to glutamate metabolism.

They suggested that the findings could help improve understanding of how digital media consumption interacts with neurochemical processes involved in self-regulation and may offer insights into the neural mechanisms behind excessive short-video use. 

The study, however. does not establish that short-video viewing directly causes a loss of self-control or addictive behavior.

<h2>Why Excessive Short-Video Maybe Harmful?</h2>

Previous research has linked excessive short-video use with changes in attention, focus and mental well-being.

Studies in Nature Communications and research from the American Psychological Association suggest that highly stimulating, rapidly changing content may encourage constant novelty-seeking and make sustained attention more difficult.

<ul><li>Reward-seeking behavior</li><li>Reduced attention span</li><li>Mental fatigue</li><li>Sleep disruption</li><li>Emotional reactivity  </li></ul>Research in JAMA Pediatrics has also linked heavy screen use among adolescents with attention difficulties and lower well-being, although effects vary based on screen time, content and usage patterns.

Short videos are not inherently harmful, but excessive or compulsive scrolling can become a concern when it interferes with sleep, work, studies or daily life.

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Are you someone who can spend hours scrolling through short videos on Instagram, YouTube or TikTok? A new study suggests that watching preferred short videos may temporarily quiet brain regions involved in self-control and monitoring, offering a possible clue to why it can be so hard to stop.Short Videos May Quiet Brain’s Self-Control NetworkThe research, published in the journal NeuroImage, found that watching preferred short videos may temporarily suppress activity in parts of the brain involved in cognitive control. This effect may also be linked to levels of the brain chemical glutamate.The study focused on the dorsal anterior cingulate cortex (dACC) and dorsolateral prefrontal cortex (dlPFC). Both are key regions of the cognitive control network, which becomes active during tasks that require mental effort, attention and self-regulation.Researchers from Zhejiang University in China found that both the dACC and dlPFC showed significant deactivation when participants watched preferred videos to completion, compared with less-preferred videos that were stopped early.The liked videos significantly reduced activity in both brain regions linked to cognitive control. When participants watched videos they chose to continue, activity in the dACC and dlPFC fell below normal resting levels.However, disliked videos showed a different pattern. Activity in the dACC remained close to normal, while the dlPFC was still suppressed. Meanwhile, the visual cortex remained active during both types of videos, suggesting the changes were linked to the viewing experience rather than simply looking at a screen.Glutamate May Influence How The Brain RespondsThe small study of 56 participants also examined whether resting levels of two important brain chemicals could help explain differences in how participants’ cognitive control networks responded during short-video viewing.Glutamate is the brain’s main excitatory neurotransmitter, helping increase neural activity. Gamma-aminobutyric acid (GABA) is the brain’s main inhibitory neurotransmitter, helping reduce or regulate neural activity.The researchers found that resting-state glutamate levels in the dACC were associated with the extent of brain deactivation. Higher glutamate concentrations were linked to less suppression of activity in both the dACC and dlPFC.Functional connectivity between the dACC and dlPFC also increased during video viewing, particularly when participants watched their preferred videos.How Immersive Viewing Affects BrainThe researchers said the findings provide new evidence that immersive viewing of preferred short videos can deactivate the cognitive control network and that individual differences in this response may be linked to glutamate metabolism.They suggested that the findings could help improve understanding of how digital media consumption interacts with neurochemical processes involved in self-regulation and may offer insights into the neural mechanisms behind excessive short-video use. The study, however. does not establish that short-video viewing directly causes a loss of self-control or addictive behavior. Why Excessive Short-Video Maybe Harmful?Previous research has linked excessive short-video use with changes in attention, focus and mental well-being.Studies in Nature Communications and research from the American Psychological Association suggest that highly stimulating, rapidly changing content may encourage constant novelty-seeking and make sustained attention more difficult.Potential effects include:Reward-seeking behaviorReduced attention spanMental fatigueSleep disruptionEmotional reactivity  Research in JAMA Pediatrics has also linked heavy screen use among adolescents with attention difficulties and lower well-being, although effects vary based on screen time, content and usage patterns.Short videos are not inherently harmful, but excessive or compulsive scrolling can become a concern when it interferes with sleep, work, studies or daily life.

ever wonder why you keep scrolling short videos? your brain may be switching off self-control

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Ever Wonder Why You Keep Scrolling Short Videos? Your Brain May Be Switching Off Self-Control

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