Don't Inhale: Researchers Warn Second-Hand Smoke Can Damage Memory
September 12, 2012 4:33 PM
comment(s) - last by
(Source: Campus Drive)
Those exposed forget 1 out of every 5 things their unexposed peers would recall
, located near Newcastle in the Northeastern coast of England, has produced a cautionary study warning that second-hand smoke may lead to memory loss.
[abstract] in the peer-reviewed journal
, the work by Psychologists
Drs. Tom Heffernan
compared 27 second-hand smokers (SHS), 27 current-smokers (CS), and 29 non-second-hand smokers (non-SHS). Participants were subjected to the
Cambridge Prospective Memory Test
(CAMPROMPT), a common memory test. The researchers took into consideration age, other drug use, mood, and IQ, in an effort to narrow the correlation down to smoke inhalation or lack thereof.
Current smokers fared the worst on the test, recalling approximately 25-30 percent less than their non-exposed peers in time- and event-based tasks. But somewhat more surprising, the researchers also observed a time-based memory gap in those exposed to second-hand smoke. They recalled over 15 percent less than their non-exposed peers. Interestingly, memory was not affected in event-based tasks.
The authors conclude:
In a sample of never-smoked adults, exposure to SHS is associated with increased time- based, but not event-based objective PM impairments when compared with a Non-SHS group, but not to the same level of impairments as observed in current smokers. Given the concerns raised by the World Health Organisation in relation to the global impact of current smoking and exposure to SHS upon a range of health measures and other indices this is a topic that is of major public interest. Despite this, there is little in the way of systematic study on what impact exposure SHS has on everyday remembering, with the findings presented here representing the first in this line of research.
At an applied level, the findings from the present study could be incorporated into campaigns that alert people to the dangers of exposure to SHS beyond health indices and highlighting the everyday cognitive consequences of such exposure. Clearly the findings from this exploratory study could be integrated into such initiatives.
The second-hand smokers in the study were exposed to, on average, 25 hours a week (3.6 hr. per day) for 4 and 1/2 years.
As with other studies on drug abuse, it's important to note that the observed phenomena was merely a correlation -- how exactly smoke affects the brain is very poorly understood, beyond basic reward circuitry.
There are many compelling questions raised by the study. The biggest is how exactly the memory impairment works on a neurological level. Another major question is whether
so-called "third-hand" smoke
-- smoke absorbed by a building occupied by a heavy smoker -- could have a similar, but smaller affect. Some studies have suggested that this may be the case with other smoking-related health issues.
Alcohol has been
similar memory impairment (though recent studies rebuke the hypothesis of brain cell death). However, there is no second-hand analogy with alcohol. On the other hand marijuana has been
short-term memory loss. Given the poor understanding of second-hand (tobacco) smoke and memory loss with tobacco (the NU paper claims to be the first study on the topic), the impact of second-hand marijuana smoke is likely poorly misunderstood.
Smoking has been linked to many adverse health affects. [Image Source: Reuters / Alexandra Beier]
In addition to memory affects, previous studies have shown a link between tobacco
smoking and brain damage
indicated smoking reduced brain activity in teens. Tobacco has also been linked to
a variety of cancers
, including testicular cancer. Habitually
smoking marijuana also showed
a clear correlation with certain kinds of testicular cancer.
It's clear that you should be careful what you inhale -- there is compelling evidence that it
damage your memory or cause other adverse affects, though researchers in some cases aren't sure quite how that process occurs.
This article is over a month old, voting and posting comments is disabled
RE: Nothing like hearing that 40 years too late
9/13/2012 6:49:20 AM
Can't smoke in bars in Virginia and we're one of the top tobacco states in the country.
"If they're going to pirate somebody, we want it to be us rather than somebody else." -- Microsoft Business Group President Jeff Raikes
Studies: Tobacco and Pot Offer Almost Identical 2-Fold Testicular Cancer Risk
September 11, 2012, 2:07 PM
Study: Morning Smoke Linked to Greatly Increased Cancer Risk
August 8, 2011, 5:36 PM
Teen Smoking Linked to Reduced Brain Activity
March 8, 2011, 1:36 PM
Pollutant "Thirdhand Smoke" Lingers in Homes Long After Smokers Move Out
December 17, 2010, 6:12 PM
New Study: Smoking and Second Hand Smoke Cause Brain Damage
June 25, 2009, 4:35 PM
Scientist Confirm Men are More Likely to Die in "Idiotic" Ways
December 17, 2014, 1:07 PM
Shoppers Surprised to Find Cards Against Humanity's Bullsh*t is Real Feces
December 16, 2014, 11:14 PM
Air Force Worries Hot Fuel Could Harm F-35, "Proactively" Paints Trucks Shiny
December 11, 2014, 9:06 AM
McDonald's is Testing Tablet-Based Burger Customization at 30 Franchises
December 10, 2014, 11:30 AM
Detroit Pulls Together Amidst Massive Blackout
December 2, 2014, 3:57 PM
Some Dark Side For Your Black Friday: Official Star Wars Ep. VII Trailer Lands
November 28, 2014, 1:02 PM
Most Popular Articles
BlackBerry Classic Sells Out Online (Seriously, It Has) for North America
December 15, 2014, 7:07 PM
LaWS (Laser) "Kills" Boat-Hauled Fuel Tanks, UAV "Bomber" in the Persian Gulf
December 12, 2014, 8:31 PM
Quick Note: Windows Phone Finally Gets Candy Crush Saga
December 13, 2014, 2:03 PM
Lamborghini Offers Up $6,000 Leather-Bound Android Smartphone
December 12, 2014, 3:12 PM
After Coming So Close to Recovering, Northern White Rhino is Nearly Extinct
December 15, 2014, 11:30 AM
Latest Blog Posts
Sceptre Airs 27", 120 Hz. 1080p Monitor/HDTV w/ 5 ms Response Time for $220
Dec 3, 2014, 10:32 PM
Costco Gives Employees Thanksgiving Off; Wal-Mart Leads "Black Thursday" Charge
Oct 29, 2014, 9:57 PM
"Bear Selfies" Fad Could Turn Deadly, Warn Nevada Wildlife Officials
Oct 28, 2014, 12:00 PM
The Surface Mini That Was Never Released Gets "Hands On" Treatment
Sep 26, 2014, 8:22 AM
ISIS Imposes Ban on Teaching Evolution in Iraq
Sep 17, 2014, 5:22 PM
More Blog Posts
Copyright 2014 DailyTech LLC. -
Terms, Conditions & Privacy Information