Researchers say older adults, youngsters grow same amount of new brain cells
Researchers say older adults, youngsters grow same amount of new brain cells
The human brain continues to grow new neurons until death a new study shows
Getty Images Contributor
06 April, 2018, 23:19
Using autopsied brain samples from 28 people who died suddenly between the ages of 14 to 79, researchers looked at "newly formed neurons and the state of blood vessels within the entire human hippocampus soon after death", said the Cell Stem Cell study. This large range of ages gave the researchers a varied pool to pull from as they looked into neurogenesis and if it was truly happening as the subjects continued to age.
"We don't find fewer of the new neurons or fewer of the progenitors of new neurons, but we find that new neurons might make fewer connections", Boldrini said.
The authors note that a drop in plasticity might help explain why even healthy people can become more emotionally vulnerable as they age, but that the formation of new cells including neurons might help protect against cognitive or emotional decline. However, the older brains still numbered thousands of these cells and the number of neurons in an intermediate to an advanced stage of development was found to be the same across all age groups.
"It is possible that the changes we see in the older brains are related to some cognitive-emotional changes that occur with aging and exercise, diet, and medications may help, but future studies are needed to investigate these ideas".
The primary difference between older and younger brains identified in this new study was a decline in vascularization.
Looking at brain samples from 59 adults and children, "we found no evidence of young neurons or the dividing progenitors of new neurons" in the hippocampi of people older than 18, he told AFP when the study was published. This is a process called neurogenesis. These brains were also treated with different chemicals, and they were comparing them to each other.
"According to mice studies there are these pluripotent stem cells that are a pool of cells that don't normally do anything, they are quiescent, and then they can undergo division", said Boldrini, adding that some studies have suggested that we might be born with a finite pool of these "mother cells".
"Even though we make these new neurons, they might be less plastic, or maybe making fewer connections or migrating less", said Boldrini.
A study last month led by Arturo Alvarez-Buylla of the University of California in San Francisco found the opposite, however.
"We conclude that recruitment of young neurons to the primate hippocampus decreases rapidly during the first years of life, and that neurogenesis in the dentate gyrus does not continue, or is extremely rare, in adult humans", Sorrells et al. wrote. "It boils down to interpretation of equivocal cells which we took extra steps to characterise extensively and showed not to be new neurons as they first appeared".
The debate is surely set to continue, and it's not just an academic argument. Boldrini and the team used specialized computer software for the task.
Boldrini countered by claiming her team's study utilized better maintained and collected brain samples, as well as more effective analysis techniques. And they said they analyzed three to five sections of the hippocampus.
APG Asset Management US Inc. lifted its position in Simon Property Group by 0.3% in the 4th quarter. (NYSE:SPG) for 1,045 shares. Ci Global Investments Inc decreased Synchrony Finl (NYSE:SYF) stake by 3.07M shares to 504,279 valued at $19.47M in 2017Q4.
On the border, Mexicans unanimously rejected the measure, but also agreed it wouldn't have much practical effect. And Mexican President Pena Nieto said Trump's "threatening attitudes and a lack of respect" were unjustified.
The Netflix series was still called " Montauk " when the platform announced in 2015 that it had ordered eight episodes. He claims he had a meeting with the Duffers in 2014 where he pitched them a series based on the short film.
Other reports indicate that growing optimism among businesses and consumers should help propel the economy in the months ahead. USA construction payrolls fell by 15 000 in March, the first decline since July, following a gain of 65 000 in February.
Iaquinta has also won his last five fights in a row and he's now ranked in the top 15 in the lightweight division. The former UFC lightweight champion, Pettis was originally expected to fight Michael Chiesa on the main card.
In other CVS Health news, EVP Helena Foulkes sold 19,965 shares of CVS Health stock in a transaction on Friday, February 16th. Mufg Americas Hldg Corporation owns 52,089 shares. 1,742 were reported by Falcon Point Capital Limited Liability Corporation.
He is now assistant dean and chief of staff at the University of Colorado at Boulder's College of Engineering and Applied Science. The hotel will orbit Earth every 90 minutes, meaning those aboard will see an average of 16 sunrises and sunsets every 24 hours.
On Wednesday, November 1 RBC Capital Markets downgraded Barrick Gold Corporation (NYSE: ABX ) to "Sector Perform" rating. It dived, as 20 investors sold SN shares while 34 reduced holdings. 66 funds opened positions while 185 raised stakes.
Teddy Baltimore Smith, 44, was arrested and charged with 2nd Degree Murder, Tampa Police announced in a press release. Tampa Police made an arrest on Thursday night in connection to the murder of a man during a road rage incident.
Previous year during the launch of iPhone X , Apple showcased some exclusive AR Snapchat lenses, specially made for iPhone X . However, the map of user's face Truedepth camera and information of up to 50 face details can be accessed by developers.
Monty Python alum Terry Gilliam's long-in-development film The Man Who Killed Don Quixote has received its first trailer. That looks in doubt as the film has reportedly run into a dispute with one the film's former producers.
Thompson Siegel & Walmsley Limited Liability Corp holds 0.16% of its portfolio in Johnson & Johnson (NYSE:JNJ) for 96,663 shares. BidaskClub raised shares of Copart from a "buy" rating to a "strong-buy" rating in a research report on Wednesday, March 21st.
Hard Facts About BP plc (NYSE:BP)
UNP stock is now showing up return of 1.79% throughout last week and witnessed rising return of 1.38% in one month period. If we take a long term observation, shares have been trading at a distance of 6.53% from the 200-day moving average.
Facebook admits to secretly deleting CEO's messages
Call and Text History: Call and text history is part of an opt-in feature for people using Messenger or Facebook Lite on Android . Next week Facebook will be notifying users who had their data accessed by Cambridge Analytica.
Conor McGregor Charged With Assault In Chaotic Attack Of Bus
Chiesa, scheduled to fight Anthony Pettis in a lightweight encounter, was badly cut from shattered glass from the bus window. He presented himself at the 78 Precinct police station last night and is due to appear in court in NY later today.
Holloway Medically Unfit to Fight at UFC 223
Three other fights were dropped from the card unfortunately as a direct result of yesterday's incident with Conor McGregor . Nurmagomedov and his team found Lobov, a teammate of McGregor's and close friend in the fighter hotel earlier this week.
Russian Federation seeks to block Telegram messaging app
If Russia moves ahead with the ban, then domestic ISPs will have to blacklist domains and IP addresses that Telegram uses. Russian entrepreneur and company founder Pavel Durov refused, and the Russian government took Telegram to court.
Children get Easter eggs for festive cheer
A local business is taking a page out of the annals of the Bluefield Daily Telegraph with its first-ever, community-wide egg hunt. Inside numerous Easter eggs were coupons and certificates to several different businesses around Brush.