Tag

Eeg

All articles tagged with #eeg

science1 month ago•13 min saved

Dying-Brain Gamma Burst Sparks Debate on Near-Death Imagery

A 2013 University of Michigan rat study found a brief, highly synchronized gamma-band surge in the 30 seconds after cardiac arrest, suggesting the dying brain remains highly coordinated and potentially linked to the vivid imagery reported in near-death experiences; later human data (2022 case and 2023 follow-ups) showed gamma activity in some dying patients, fueling debate about whether such brain activity underpins conscious experience or reflects other processes, while acknowledging the findings don’t settle the broader question of consciousness.

via Space Daily|

#cardiac-arrest #consciousness #eeg

science1 month ago•13 min saved

Hearing Persists in the Final Hours, EEG Study Finds

A 2020 University of British Columbia EEG study, published in Scientific Reports, found actively dying hospice patients still exhibit brain responses to sounds hours before death—through event-related potentials—suggesting the voices of loved ones in the room may reach them even when they are unresponsive. The finding lends neural support to hospice guidance to speak normally and play familiar sounds, though it does not prove subjective experience and the study’s small, variably conditioned sample limits broad conclusions.

via Space Daily|

#auditory-processing #eeg #end-of-life-care

sleep1 month ago•31 min saved

THC-CBD sleep study shows altered brain rhythms and delayed dreaming phase

In a small, blinded crossover trial of twenty adults with insomnia, a single oral dose of 10 mg THC plus 200 mg CBD shortened total sleep by about 25 minutes and cut REM sleep by roughly 34 minutes, while delaying REM onset by more than an hour. High-density EEG revealed calmer activity in lighter sleep stages but reduced slow-wave activity in deep sleep and increased fast rhythms in posterior regions during REM, indicating more nocturnal arousal and shallower sleep. Next-day cognitive tests were largely unchanged, though participants reported mild sleepiness. The study’s limitations—small sample size and one-night exposure—call for longer-term research on safety and tolerability of medicinal cannabis for sleep.

via PsyPost|

#cannabis #eeg #insomnia

health1 month ago•3 min saved

Evening Caffeine Trims Deep Sleep, Warns New Sleep Research

A review of 32 caffeine-related sleep studies shows caffeine reduces slow-wave, non-REM deep-sleep brain activity and increases wakeful sleep patterns, even when people get 7–9 hours of sleep or feel rested. The effects vary with dose and timing, and depend on individual sleep quality, suggesting total daily caffeine intake and how quickly it metabolizes before nightfall matter. Limiting caffeine, not just avoiding it late, may help protect sleep quality.

via Gizmodo|

#caffeine #deep-sleep #eeg

space1 month ago•12 min saved

Ann Druyan’s Brainwaves Echo Across the Cosmos on Voyager’s Golden Record

The Voyager Golden Record includes an hour-long recording of Ann Druyan’s brainwaves and heartbeat, compressed into a one-minute track created in 1977 to guide thoughts about Earth’s history, civilization, and her love for Carl Sagan. Druyan intended it as a private meditation that could hint at inner life to any future listener, perhaps alien; today, neuroscience would say such thoughts are unreadable without the full context. The piece frames a hopeful, human, interior moment encoded for interstellar travel as Voyager 1 and 2 sail onward through interstellar space.

via Space Daily|

#ann-druyan #brainwaves #eeg

science1 month ago•13 min saved

Dying Brain’s Gamma Burst: Real Signal, Unclear Meaning

A subset of dying patients and rodents show a transient, high-amplitude gamma-band surge on EEG after cardiac arrest, with unusually strong cross-regional brain coordination. While this activity is real and reproducible in observed cases, scientists caution that its relation to consciousness or near-death experiences is not proven, and the evidence is limited by small samples and methodological challenges.

via Space Daily|

#consciousness #dying-brain #eeg

health1 month ago•16 min saved

Anesthesia may trigger sleep-and-coma brain states, Yale study suggests

Yale scientists used full-head EEG to monitor patients under propofol anesthesia and found the brain can enter states that resemble both sleep and coma, challenging the idea that anesthesia is simply deep sleep. The findings could guide better, individualized anesthesia care to minimize postoperative cognitive effects and push toward a sleep-like brain state during procedures.

via Hartford Courant|

#anesthesia #brain #coma

health1 month ago•9 min saved

Brain under anesthesia: a mix of sleep and coma, Yale study finds

A Yale-led study using full-head EEG recordings shows anesthesia does not simply put the brain to sleep; instead, anesthetized brains can exhibit sleep-like and coma-like patterns in different regions, challenging the sleep-vs-coma dichotomy and highlighting the potential for real-time brain monitoring to tailor anesthesia and reduce post-surgical cognitive effects.

via futurity.org|

#anesthesia #brain #coma

science2 months ago•8 min saved

Dreams on Demand: The Brain Flips into Dream Narratives Across Awake and Sleep

A study with 92 participants using Edison-inspired wake interruptions found four mental states (C1–C4) that appear across wakefulness, sleep onset, and light sleep, including a bizarre dream-like C3 with a neural signature of reduced frontal–occipital connectivity. This shows dreaming can occur while awake, challenges the strict wake/sleep divide, and has implications for paradoxical insomnia and creative insight during wake–sleep transitions.

via Neuroscience News|

#dream-like-states #eeg #hypnagogia

science2 months ago•6 min saved

Seeing the Sound: Visual Cues Sharpen Hearing in Noise

A Shanghai Jiao Tong University study shows that closing the eyes actually impairs detecting sounds in noisy settings, while watching a related video improves auditory detection by about 3 dB. EEG data suggest eye closure triggers inward focus and overfiltering of sounds, whereas visual input helps anchor the auditory system to the external world, with implications for hearing aids and real-life listening.

via The Daily Galaxy|

#eeg #hearing #multisensory-perception

science2 months ago•5 min saved

Eyes Open and Eyes Open Video: Visual Cues Boost Hearing in Noise

A study with 25 volunteers found that keeping eyes open and viewing related visuals enhances hearing in noisy environments, while closing eyes makes it harder to detect sounds. EEG data showed eye closure increases suppression of background noise, whereas visual input—especially videos—helps anchor auditory perception. Participants were tested under four visual conditions (eyes closed, blank screen, still image, video) with several target sounds in 70 dB noise, revealing progressively better detection with more engaging visuals. The work, published in The Journal of the Acoustical Society of America, suggests visual engagement can improve auditory sensitivity even in noisy settings.

via ScienceAlert|

#acoustics #eeg #hearing

technology2 months ago•7 min saved

Mind-Reading Beanie Aims to Type by Thought, Not Keyboard

California startup Sabi is building a noninvasive brain-computer interface worn as a beanie that translates imagined speech into on-screen text, aiming for about 30 words per minute with a high-density EEG sensor array and a consumer-friendly design, backed by end-to-end encryption and a large-scale brain foundation model, with a product expected by year-end.

via WIRED|

#brain-computer-interface #brain-foundation-model #eeg

science3 months ago•4 min saved

Brain scans reveal how humans map space with echoes

An EEG study comparing expert echolocators to sighted participants shows that returning echoes help the brain build a spatial map of the surroundings, with the best performance from individuals who were blind from an early age. Echo-based perception improves over successive clicks, engaging both auditory and visual brain pathways and illustrating brain plasticity when vision is absent.

via ScienceAlert|

#blindness #brain #echolocation

science3 months ago•6 min saved

Xi–αNET Connects Brain Wiring to EEG Rhythms Across the Lifespan

A multinational study introduces Xi–αNET, a generative model that links EEG signals (the background ξ and alpha rhythms) to the brain’s physical wiring and axonal conduction delays across ages 5–100 using the HarMNqEEG dataset. The findings show alpha frequency scales with myelin-driven conduction speed, producing a U-shaped trajectory of conduction delays with age and slower rhythms in older adults; the model also detects Parkinson’s-related alpha slowing, highlighting potential EEG-based brain-health benchmarks and early disease flagging via normative charts.

via Neuroscience News|

#aging #eeg #myelin

science3 months ago•6 min saved

Green Time, Brighter Minds: Nature Lowers Negative Emotions Across Real, VR, and Imagined Environments

A meta-analysis of 33 studies with 2,101 participants finds exposure to nature—outdoors, virtual reality, or imagined scenes—reduces negative emotions and supports brain health, with EEG and other neuroimaging data showing a more balanced emotional state. The researchers advocate integrating ‘Nature Rx’ into urban design to protect the population’s brain capital as urbanization rises.

via Neuroscience News|

#eeg #mental-health #nature