brain fog covid vaccine side effect brain fog covid vaccine side effect

Vaccine. The authors report no conflicts of interest in relation to this work. If you are responding to a comment that was written about an article you originally authored: Twitter accounts tied to China lied that COVID came from Maine lobsters, Oxford's Archives of Clinical Neuropsychology, Researchers are concerned about the possibility that COVID-19 might lead to dementia, Your California Privacy Rights/Privacy Policy. We shouldnt be averse to adverse events, says William Murphy, an immunologist at the University of California, Davis. People with lasting health problems after vaccination welcome any attention to their plight. Background: At our dizziness center, we saw a spike of dizziness consults after patients were diagnosed with COVID-19 infections or received COVID-19 vaccinations. While the number of patients they studied is too small for their results to be definitive, Yale researchersusing their extensive experience with two existing medicationshave published initial evidence that those drugs, given together, can mitigate or even eliminate brain fog. It will help protect you from getting COVID-19. 2021 John Wiley & Sons A/S. She has not experienced any dizziness since. My Long COVID Disability Journey. Summary: A number of videos have surfaced on popular channels showing people experiencing some adverse effects following the coronavirus vaccine.Researchers say some of the cases could be related to functional neurological disorder, a common neuropsychological condition. Not only are nearly 600,000 people no longer with us here in the US, millions are and will be dealing with the aftereffects of exposure to their lungs and hearts probably for the rest of their lives. I just feel so grateful for my collaboration with Amy Arnsten and that my understanding of traumatic brain injury could be helpful, says Fesharaki-Zadeh. Other common side effects includedprocessing speed (the time it takes someone to perform a mental task), executive functioning (associated with setting and completing goals), and phonemic and category fluency (the ability to come up with words based on certain criteria). This study aims to examine if the infection, vaccination, or antibodies from such could be the reason for the dizziness complaints or if other factors explain patients dizziness. Although she found relief with the treatment, she had to briefly stop due to dizzy episodes, and her cognitive deficits returned. In response to reports that some people developed Guillain-Barr syndrome after receiving the AstraZeneca or Pfizer vaccines, the European Medicines Agency listed Guillain-Barr syndrome as a rare side effect of the vaccines. A COVID side effect? A healthy diet including olive oil, fruits and vegetables, nuts and beans, and whole grains has been proven to improve thinking, memory. A full year has passed since the COVID-19 pandemic began, and the mind-boggling aftermath of the virus continues to confuse doctors and scientists. Acta Neurol Scand. Like this man, many people who have recovered from the acute, life-threatening effects of COVID-19, but still dont feel that their thinking and memory are back to normal. Reassuring the public that everything is being done, researchwise, to understand the vaccines is more important than just saying everything is safe, Murphy says. But that November, shed received a dose of AstraZenecas vaccine as a volunteer in a clinical trial. (ROBYN BECK . Myocarditis is the inflammation of the heart muscle, while . Symptoms of brain fog can include: memory problems. MedicineNet does not provide medical advice, diagnosis or treatment. Particularly concerning for doctors and patients alike are lingering side effects, such as memory loss, reduced attention and an inability to think straight. Of course it is pretty much harmless for me to arrange words on paper but for someone having to maneuver many tons of machinery while making a series of critical interconnected decisions could be a recipe for disaster. When the microglia are more reactive, the brain has trouble keeping up . All rights reserved. Proton-pump inhibitors: Should I still be taking this medication? Rev Med Virol. Accessibility COVID-19 vaccines pros and cons "The most effective treatment we currently have is prevention with COVID-19 vaccines," says Dr. Diesing. The study,which was published Friday in the peer-reviewed medical journal JAMA Network Open, analyzed patients who contracted COVID-19, not people who only received the COVID-19 vaccine. SARS-CoV-2; adverse effect; demyelinating disease; safety. Lai CC, Chen IT, Chao CM, Lee PI, Ko WC, Hsueh PR. Since then I have . How COVID-19 Compromises Brain Function. 'Royal Free Hospital'. Conclusions: We believe that the COVID-19 infections or vaccinations may trigger PPPV as stressors, but mostly not due to the virus infections or its antibody reactions. In her home office in Cranston, R.I., Dr. Wilson, 36, an . 2023 Jan 27;41(5):1003-1008. doi: 10.1016/j.vaccine.2023.01.003. More discrete side effects connected to COVID-19 vaccines have been recognized, including a rare but severe clotting disorder that occurs after the AstraZeneca and Johnson & Johnson vaccines and heart inflammation, documented after the messenger RNA (mRNA) vaccines manufactured by Pfizer and Moderna. Then there was a heat wave and he was really tired. Were stuck in this horrible in-between, says the patient who traveled to NIH last spring. Rates of the disorders were measured in the 21 days after the first vaccine dose, 90 days after a positive COVID-19 test, and between 2017 and 2019 in the general population group. -, Lazarus JV, Ratzan SC, Palayew A, et al. The study also foundcommon lingering symptoms, such as trouble breathing, abdominal ailments, fatigue, pain, anxiety and depression. COVID-19 research information and resources by topic from NIHinstitutes andcenters, RECOVER: Clinical Research for Helping People with Long COVID. Brain fog is not a medical or scientific term; it is used by individuals to describe how they feel when their thinking is sluggish, fuzzy, and not sharp. Ketamine for treatment-resistant depression: When and where is it safe? (Though vaccines are still very effective even without . The vaccines are safe and effective and cannot give you the disease. Dressen had never had COVID-19. There should be a simple procedure set up for professional people to be taken out of rotation till they are comfortable at the controls of the machine or tool in their hands. How can you concentrate if you were up half the night and awoke with a headache? Mental health effects may be more significant among individuals who've contracted the virus, . Vaccines are now rushing to the market. Nov. 4, 2021, at 11:28 a.m. A COVID Booster to Beat Brain Damage. Federal government websites often end in .gov or .mil. Brain fog is also common if you have depression, anxiety or stress. 2021 Aug;20(8):1013-1025. doi: 10.1080/14760584.2021.1949293. Executive functioning, working memory, and attention regulation are carried out by a recently evolved area in brain called the prefrontal cortex. Thirty out of 40 patients had histories of anxiety, depression, other mood disorders, or family histories of mood disorders. Less common symptoms included dizziness, blurred vision and tinnitus (ringing in the ears). As time passed, however, the patients say the NIH scientists pulled back. NIH-supported research has found that brain fog, a common effect of COVID-19, could be caused by the immune systems response without SARS-CoV-2 infection of the brain or nerves. Previously reported:Researchers are concerned about the possibility that COVID-19 might lead to dementia, Follow Michelle Shen on Twitter:@michelle_shen10. Nat Mater. All rights reserved. Joint pain. More discrete side effects connected to COVID-19 vaccines have been recognized, . And the mRNA technology has so much potential. But these side effects, which for her have improved somewhat but havent disappeared, should be acknowledged and understood, she says. Submit only on articles published within 6 months of issue date. Other patients describe vaccine opponents asserting that they deserve to die because they were foolish enough to get vaccinated. A Long Covid patient at a hospital in Poland plays a virtual reality game to test reaction skills. It is best for such patients to receive care from their local physicians, he wrote to her. FOIA Our findings may help explain the brain fog, fatigue, and other neurological and psychiatric symptoms of long COVID. In a finding that reinforces the safety of COVID vaccines, a new study shows that while the shots don't raise the risk of rare neurological problems, COVID-19 infection might. He instructed patients to take 1 mg of guanfacine at bedtime, and if well-tolerated, to increase the dosage to 2 mg after one month. March 7, 2022, 8:01 AM PST. feeling "out of it". It may even raise the risk of Alzheimer's. MeSH National Library of Medicine As time passed, the Dressens found other people who had experienced serious, long-lasting health problems after a COVID-19 vaccine, regardless of the manufacturer. You may get similar symptoms after other infections, a minor head injury or during the menopause. 2021 Jul;144(1):109-110. doi: 10.1111/ane.13451. But an etiological association? 0:00. I offered a facetious glimpse at the side-effects of that shot. Deans Advisory Council on Lesbian, Gay, Bisexual, Transgender, Queer and Intersex Affairs Website, Minority Organization for Retention and Expansion Website, Committee on the Status of Women in Medicine Website, Director of Scientist Diversity and Inclusion, Diversity, Inclusion, Community Engagement, and Equity Website, Yale BBS Diversity & Inclusion Collective, Physician-Scientist & Scientist Development, Yale Physician-Scientist Development Awards, Yale International Physician-Scientist Resident and Fellow Research Award, Program for the Promotion of Interdisciplinary Team Science (POINTS), Connecticut Towns COVID-19 Impact Dashboard, CT Correctional Facilities with COVID Cases Dashboard, US Racial and Ethnic Disparities in COVID-19 Mortality, Risk of Complications Conditional on COVID-19 Infection, Travel Time to COVID Testing Sites in Connecticut, Travel Time to COVID Testing Sites in the US, Peer-Reviewed Publications by Yale Authors, Submitted by Robert Forman on December 13, 2022, https://support.microsoft.com/en-us/help/17621/internet-explorer-downloads. Long-termCOVID-19 side effects couldinclude memory loss and other cognitive dysfunctionscommonly labeled as "brain fog," according to a study released that examined740 patients in theMount Sinai Health System. Health Alerts from Harvard Medical School. Does the COVID-19 vaccine cause neurological problems? coronavirus (covid-19) center/ coronavirus a-z list/ brain problems after covid vaccine vs infection article. Study findings. Or, for that matter, a doctor in the operating room. Don't miss your FREE gift. His doctor ran him through a checkup and a battery of tests. Headache. Says the health care worker of the effort: Its too much for two people at the NIH to do.. In January 2021, Brian Dressen sought help from Nath, who had been studying Long Covid. As a cognitive behavioral neurologist, Ive been hearing from many individuals who are complaining of brain fog after infection with COVID-19. The effects also could lead to the development of new conditions, such as diabetes or a heart or nervous . by Amy_ | Mar 2, . Can electrical brain stimulation boost attention, memory, and more? Additionally, booster shots produced reactions similar to . An ice roller to cool your skin. For some, the brain fog completely resolved, and they were able to resume their normal activities. Plus, get a FREE copy of the Best Diets for Cognitive Fitness. 2023 www.monroenews.com. RECOVER is unprecedented in its size and scope as the most-diverse, deeply characterized cohort of Long COVID patients. Ann E. Wallace during her fifth trip to the emergency room due to COVID-19 in . Long Covid, in contrast, affects anywhere from about 5% to 30% of those infected by SARS-CoV-2. Jana Ruhrlnder, too, feels caught. Feeling unwell. Nath told Science NIH facilities are not equipped to treat large numbers of patients long-term. Ive had both Moderna shots and encourage everyone to get vaccinated. What is myocarditis, and how does it relate to the COVID vaccine? In 2020, while hunting for antibody therapies for COVID-19, he and his colleagues discovered that of 18 antibodies they identified with potent effects against SARS-CoV-2, four also targeted healthy tissues in micea sign they could trigger autoimmune problems. We exemplify potential neurological problems these vaccines could cause by looking at previous studies. On hearing reports of enduring neurological symptoms among some COVID-19 patients, Wyss-Coray became interested in how SARS-CoV-2 infection might cause such problems, which resemble those that occur due to aging as well as to . I suspect I will be wearing a mask every flu season every year from here on out. I dont know. In other words, he does not know whether vaccination directly caused the subsequent health problems. The collected literature indicated that the neurological side effects associated with SARS-CoV-2 vaccines included headache, transverse myelitis, Guillain-Barre Syndrome (GBS . The researchers focused on four immune-related neurological disorders: Bell's palsy (facial weakness), encephalomyelitis (inflammation of the brain and spinal cord), Guillain-Barr syndrome (a nerve condition), and . Read stories about the efforts underway to prevent, detect, and treat COVID-19 and its effects on our health. Some vaccine recipients have reported that these temporary effects were more pronounced after the second dose than the first. Unauthorized use of these marks is strictly prohibited. Eleven candidates are in advance development. Memory recall refers to accessing memories that are stored already and retrieving them for use. 2020;19(5):305306. Because COVID-19 is a respiratory virus, some symptoms, like chest pains and coughing, are to be expected. An official website of the United States government. The Coronavirus Vaccine Side Effects Poll. "After you get the first vaccination, your body is revving up the immune system and . For more on COVID-19 vaccines, see the U.S. Centers for Disease Control and Prevention. Severe acute respiratory syndrome-coronavirus-2 spike (S) protein based vaccine candidates: State of the art and future prospects. When she resumed treatment, her brain fog once again lifted. The current evidence indicated a minor risk of the acute neurological disorders after the application. Hertz, a retired gastroenterologist who lives in Southern California, had developed debilitating side effects after one dose of the Pfizer vaccine. Terms of Use. Adverse events, including severe allergic reactions, after COVID-19 vaccination are rare but can happen.For this reason, everyone who receives a COVID-19 vaccine is monitored by their vaccination provider for at least 15 minutes. and brain health. Most side effects of the vaccine may feel like flu and are temporary and go away within a day or two. The reported severe adverse effects raised the worries about their safety. SARS-CoV-2 vaccine candidates in rapid development. A version of this story appeared in Science, Vol 375, Issue 6579. Sign up to get tips for living a healthy lifestyle, with ways to fight inflammation and improve cognitive health, plus the latest advances in preventative medicine, diet and exercise, pain relief, blood pressure and cholesterol management, andmore. Some of the effects of COVID-19 could linger for years to come. Most . All patients had brain MRI, but no MRI findings indicated inflammatory changes from infections or antibody reactions. In a study supported by the National Institute of Neurological Disorders and Stroke (NINDS), the National Eye Institute, and the National Institute of Allergy and Infectious Diseases, researchers examined how COVID-19 can affect the brains of mice and humans. Cough. -, van Riel D, de Wit E. Nextgeneration vaccine platforms for COVID19. The Food and Drug Administration is weighing whether to follow British regulators in resuming a coronavirus vaccine trial that was halted when a participant suffered spinal cord damage, even as . Gretchen Vogel is a contributing correspondent for Science magazine based in Berlin, Germany. Cell, 185(14), 24522468.e16. 10.1038/s41586-020-2008-3. The circuits that generate higher cognitive function have very special molecular needs because theyre having to create neural activity without any sensory stimulationabstract thoughts and memories, for example, she says. As a physician, in the beginning, I felt powerless. 2023 Feb;158:114208. doi: 10.1016/j.biopha.2022.114208. Brain fog . Recently I received an email from a man who described how he is still struggling with cognitive challenges since recovering from the virus in the spring of 2020. NAC, the second medication, is a robust antioxidant and anti-inflammatory agent that can also be used to treat this neural region. Clipboard, Search History, and several other advanced features are temporarily unavailable. Side effects might show up within one to three days after vaccination, and could last for one to three days after symptoms start. MedicineNet does not provide medical advice, diagnosis or treatment. 81801294/National Natural Science Foundation of China, 81871017/National Natural Science Foundation of China, 81420108014/National Natural Science Foundation of China, UK Department of Health's Research Centres, Christelijke Vereniging voor de Verpleging van Lijders aan Epilepsie, Netherlands, Wu F, Zhao SU, Yu B, et al. Still, her group and others are pushing ahead. Maybe you were jet-lagged and your thinking was sluggish because it felt like it was 2 AM. One patient in the cohort was a nurse who had become so debilitated that she had to significantly reduce her hours at work. Cheng has heard from dozens of people who describe chronic postvaccine problems, and she finds the overlap between their symptoms and those of Long Covid compelling. Nath is convinced they are extremely rare.. A Cross-Sectional Study in an Unselected Cohort, Neurology | Print ISSN:0028-3878 In a paper Prss and his colleagues are about to submit, they describe finding autoantibodies that attack mouse neurons and other brain cells in at least one-third of those patients. The patients spent at least several days undergoing neurological, cardiac, and other tests, including lumbar punctures and skin biopsies. So I thought it was worth discussing exactly what COVID-19 brain fog is, and some things to do that might help clear it. He has also seen cognitive benefits in one of his multiple sclerosis (MS) patients who was struggling with cognitive and memory deficits. These should include your brain fog and other neurologic symptoms (such as weakness, numbness, tingling, loss of smell or taste), and also problems such as shortness of breath, palpitations, and abnormal urine or stool. Would you like email updates of new search results? 8600 Rockville Pike I offered a facetious glimpse at the side-effects of that shot. The patients had temporal associations between vaccination and their faltering health, says Avindra Nath, clinical director at the National Institute of Neurological Disorders and Stroke (NINDS), who has been leading the NIH efforts. By January 2021, researchers at the National Institutes of Health (NIH) began to hear about such reports and sought to learn more, bringing Brianne Dressen and other affected people to the agencys headquarters for testing and sometimes treatment. Weve got to retain rigor, she says. (Though vaccines are still very effect 2023 Feb 15;226:107632. doi: 10.1016/j.clineuro.2023.107632. The investigators analyzed data on 8.3 million people in the United Kingdom and Spain who received at least one dose of either the AstraZeneca, Pfizer, Moderna or Johnson & Johnson vaccines and nearly 736,000 unvaccinated people who tested positive for COVID-19. The neurons have to generate and sustain their own activity. Arnsten says inflammatory factors can interfere with these molecular needs and inhibit the circuits ability to function. She says she has preliminary evidence that vaccination can lead to microclots, although in most cases they go unnoticed and quickly disappearan effect she and a colleague saw in their own blood and that of eight other healthy volunteers, which they sampled after their vaccinations. Online ahead of print. Researchers Identify Four Long COVID Categories. Pretorius says she and her colleagues have also seen patientsfewer than 20, she estimateswith chronic problems following vaccination. losing my voice intermittently, brain fog, burning/tingling limbs. Boldrini notes that some long COVID symptoms mirror those caused by various chronic brain- and personality-altering conditions, including other viral infections, traumatic brain injuries, and . Your browser is antiquated and no longer supported on this website. The researchers also hope that this regimen can be helpful in other groups of patients. A new coronavirus associated with human respiratory disease in China. As one patient after another began reporting relief, Fesharaki-Zadeh grew excited. The data werent cut and dried; it was observational studies. This month, the scientists submitted a case series of 23 people to a third publication, and Nath says his group has submitted an amendment to a Long Covid protocol to include patients with postvaccine side effects. For now, doctors and researchers have been busy creating a vaccine and finding the best way to treat active COVID infections. This month, Cedars-Sinai Medical Center cardiologist Susan Cheng and protein chemist Justyna Fert-Bober wrote in the Journal of Translational Medicine that autoantibodies could last up to 6 months after infection, although the researchers did not correlate autoantibodies persistence with ongoing symptoms. Just a few weeks ago I wrote about brain fog as a result of receiving my first shot of the vaccine. and transmitted securely. and apply to letter. CDC reports state women are experiencing more lingering side effects than men when it comes to COVID vaccines. Fesharaki-Zadeh is a clinical neuroscientist with special interests in traumatic brain injury and PTSD who has been treating his patients successfully with a combination of guanfacine and NAC for years. Objective: To explore the underlying reasons of dizziness experienced by patients after having the COVID-19 infections or vaccinations. A global survey of potential acceptance of a COVID19 vaccine. eCollection 2020. For almost one year, COVID-19 has impacted the world and taken the lives of many people. Meanwhile, the Delta Variant is sweeping through the population at an alarming rate. Side effects after injection can include fever, chills, nausea, headache, fatigue, injection-site pain, joint pain and muscle aches. 2020 Oct 14;11:585354. doi: 10.3389/fimmu.2020.585354. He instructed patients to take 1 mg of guanfacine at bedtime, and if well-tolerated, to increase the dosage to 2 mg after one month. Give your brain the best chance to heal by avoiding substances which can adversely affect it. He can be reached at rpddog@sbcglobal.net. Damage to these organs or even just the symptoms by themselves can impair thinking and memory and cause brain fog. The implications are huge. And complex and lingering symptoms like Dressens are even more difficult to study because patients can lack a clear diagnosis. And they're actually proof that your immune system is working the way it's supposed to. Epub 2020 Oct 15. Please update your browser or switch to Chrome, Firefox or Safari. His clinic hopes to soon start a clinical trial of a treatment that removes most antibodies from a patients blood. And they're actually proof that your immune system is working the way it's supposed to. Disclosure: Mr. Kahn has received personal compensation for serving as an employee of DENT Neurologic Institute. Chronic stress has been found to kill brain cells and even shrink the size of your prefrontal cortex, the part of your brain responsible for memory, focus and learning. A September visit Brianne Dressen had scheduled for additional neurologic testing was converted to a telemedicine appointment. Despite her experience, I still think the vaccines are great, Ruhrlnder says. The first and most important thing to do is to see your doctor and share with them all of the lingering symptoms you are experiencing. There are many ways that COVID-19 can damage the brain. In addition to direct effects on the brain, COVID-19 can also have long-term effects on other organ systems. And a recent study found that 30% of people who had Covid-19 still had symptoms up . For months, I just lurked there, says Dressen, a former preschool teacher in Saratoga Springs, Utah, reviewing post after post of symptoms that were just like my own.. Dr. Andrew E. Budson is chief of cognitive & behavioral neurology at the Veterans Affairs Boston Healthcare System, lecturer in neurology at Harvard Medical School, and chair of the Science of Learning Innovation Group at the, avoiding substances which can adversely affect it. While recovering from coronavirus (COVID-19), some people experience brain fog symptoms for a short time while others may experience brain fog for several months or longer. The White House announced that vaccines will be required for international travelers coming into the United States, with an effective date of November 8, 2021. . Guanfacine, one of the two drugs tested in this trial, is designed to strengthen prefrontal cortex connections and protect against inflammation and stress. As I described in a previous blog post, some can be devastating, such as encephalitis, strokes, and lack of oxygen to the brain. To help clear the brain fog, I recommend pursuing all of the activities that we know help everyones thinking and memory. Several groups are studying whether a patients postvaccination symptoms are due to autoantibodies to the angiotensin-converting enzyme 2 (ACE2) receptor, which the spike protein targets. It was only a few weeks ago that we all thought Dad had 'brain fog' after his second Covid vaccination. doi: 10.1002/rmv.2183. Submissions should not have more than 5 authors. All patients had brain MRI, but no MRI findings indicated inflammatory changes from infections or antibody reactions. At first, I was really afraid of causing vaccine hesitancy, she adds. We feel urgency to get this case report out so that more patients could be treated.. 10.1038/s41591-020-1124-9. For all the people who demand their freedom to flirt with death, I say enjoy your date;have fun. Post-COVID-19 vaccine acute encephalitis in an adult patient: A case report and literature review. Published by John Wiley & Sons Ltd. It becomes critical to know whether these vaccines will cause neurologic disorders like previously recognized vaccine-related demyelinating diseases, fever-induced seizure, and other possible deficits. In rare cases, coronavirus vaccines may cause Long Covidlike symptoms. Lines and paragraphs break automatically. NINDS Clinical Director Dr. Avindra Nath discusses past and current research on long COVID and how that research may help people with myalgic encephalomyelitis/chronic fatigue syndrome. Epub 2023 Jan 6. Many have suffered chronic fatigue, chest pain, shortness of breath and brain fog months after their infection. 1996-2022 MedicineNet, Inc. All rights reserved. Online ahead of print. The research shows that even a mild case of COVID-19 that affects only the respiratory system can cause long-term changes to how brain cells work. Sleep is a time when the brain and body can clear out toxins . Months after a bout with COVID-19, many people are still struggling with memory problems, mental fog and mood changes. Some studies suggest the virus may in certain cases linger in tissues and cause ongoing damage. They convinced me to bump this issue up a notch or two in my mind. Vaccine supporters tell them that by speaking out they risk harming others, who may refuse to get vaccinated and then die from COVID-19. Avoid alcohol and drugs. In the U.S., there has been an increase in reported cases of myocarditis and pericarditis after mRNA COVID-19 vaccination, particularly in males ages 12 through 29. poor concentration. Epub 2021 May 17. . Early clinical data point in a similar direction. Her husband, Brian Dressen, a chemist, began to comb the scientific literature, desperate to help his wife, a former rock climber who now spent most of her time in a darkened room, unable to brush her teeth or tolerate her young childrens touch. Walking to the bus stop or doing the gardening wore him out. See additional information. Covid vaccine: Shocking side effect to be aware of after recent death report COVID vaccine side effects can range from muscle aches, pain at injection site, fatigue or even nausea. In December, Nath asked her to stop sending patients his way. The side effects of COVID-19 vaccines tend to be similar to those after other routine vaccinations, and they may last for a few days. Ms. Stephenson has nothing to disclose. Theres just this complete dearth of data.. Brain fog, memory loss, and other cognitive issues can be side effects of COVID, a new study suggests. I was just struck by these younger folks who are being devastated by this disease that was continuing to persist, he says. Only five of 40 patients had abnormal VNG indications of uncompensated peripheral vestibulopathy which could be related to virus infections or antibody reactions. Miao G, Chen Z, Cao H, Wu W, Chu X, Liu H, Zhang L, Zhu H, Cai H, Lu X, Shi J, Liu Y, Feng T. Biomed Pharmacother. Another test, called the Number Span test, would see how many digits someone could recall from memory after seeing the numbers on a screen.