Moderate to severe OSA may be an independent risk factor associated with incident CMBs in the general adult population. Obstructive Sleep Apnea and Cerebral Microbleeds in Middle-Aged and Older Adults – https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2840617
Small study (n = 1441), Koreans, and this study has several limitations.
Still yikes!
For some, it can be dangerous. In the past few years, reports have swelled of people, especially teens, experiencing short- and long-term “marijuana-induced psychosis,” with consequences including hospitalizations for chronic vomiting and auditory hallucinations of talking birds. Multiple studies have drawn a link between heavy use of high-potency marijuana, in particular, and the development of psychological disorders, including schizophrenia, although a causal connection hasn’t been proved. “It’s entirely possible that this new kind of cannabis—very strong, used in these very intensive patterns—could do permanent brain damage to teenagers because that’s when the brain is developing a lot,” Keith Humphreys, a Stanford psychiatry professor and a former drug-policy adviser to the Obama administration, told me. Humphreys stressed that the share of people who have isolated psychotic episodes on weed will be “much larger” than the number of people who end up permanently altered. But even a temporary bout of psychosis is pretty bad. Marijuana Is Too Strong Now – https://www.theatlantic.com/ideas/archive/2024/08/high-potency-marijuana-regulation/679639/
“We found that alcohol and THC together significantly reduced, and in some cases prevented, the ability of the prefrontal cortex in drug-exposed rats to undergo plasticity in the same way that the brains from control animals can,” said Linyuan Shi, a graduate student in the Gulley lab. “The effects were apparent in rats exposed to either drug alone, and they were most pronounced with co-exposure to both drugs. We also found the impaired plasticity was likely due to changes in signaling caused by gamma-aminobutyric acid, a chemical messenger in the brain. When we used a chemical that enhances GABA, it could rescue the deficits we saw in the animals that had been exposed to the drugs.”
Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign. “Combined use of alcohol and THC can affect rat brains, study finds.” ScienceDaily. ScienceDaily, 30 November 2023 — https://www.sciencedaily.com/releases/2023/11/231130121946.htm
I’m glad I am not a rat.
Young adults who simultaneously use alcohol and marijuana (SAM) consume more drinks, are high for more hours in the day, and report more negative alcohol-related consequences.
On SAM use days, participants consumed an average of 37% more drinks, with 43% more negative alcohol consequences, were high for 10% more hours, and were more likely to feel clumsy or dizzy, compared with non-SAM use days.
Simultaneous Marijuana, Alcohol Use Linked to Worse Outcomes — https://www.medscape.com/viewarticle/996595?icd=login_success_gg_match_norm&isSocial
Hmmm…
“We found that alcohol and THC together significantly reduced, and in some cases prevented, the ability of the prefrontal cortex in drug-exposed rats to undergo plasticity in the same way that the brains from control animals can,” said Linyuan Shi, a graduate student in the Gulley lab. “The effects were apparent in rats exposed to either drug alone, and they were most pronounced with co-exposure to both drugs. We also found the impaired plasticity was likely due to changes in signaling caused by gamma-aminobutyric acid, a chemical messenger in the brain. When we used a chemical that enhances GABA, it could rescue the deficits we saw in the animals that had been exposed to the drugs.”
Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign. “Combined use of alcohol and THC can affect rat brains, study finds.” ScienceDaily. ScienceDaily, 30 November 2023 — https://www.sciencedaily.com/releases/2023/11/231130121946.htm
I’m glad I am not a rat.
The people with the lowest amount of social contact had overall brain volume that was significantly lower than those with the most social contact. The total brain volume, or the sum of white and grey matter, as a percentage of the total intracranial volume, or the volume within the cranium, including the brain, meninges, and cerebrospinal fluid, was 67.3% in the lowest contact group compared to 67.8% in the highest contact group. They also had lower volumes in areas of the brain such as the hippocampus and amygdala that play a role in memory and are affected by dementia.
The study does not prove that social isolation causes brain shrinkage; it only shows an association.
Social isolation linked to lower brain volume — American Academy of Neurology. “Social isolation linked to lower brain volume.” ScienceDaily https://www.sciencedaily.com/releases/2023/07/230712165229.htm (accessed July 13, 2023).
Yikes!
A study in the British Medical Journal lit up the Internet last week with the conclusion that cognitive decline begins at age 45. While it’s true that some innate skills like memory and speed of reasoning fall off as we age, other aspects of intelligence related to learning and experience actually improve.
via Patricia Cohen: The Advantages of the Middle-Age Brain | TIME Ideas | TIME.com.
Positive proof the older brain improves with time. I found an article on some positive aspects of the aging brain.
Now if I could only remember where I put my car keys…
One of the more entertaining aspects of the web is the ability for the website’s manager/blogger to see the search strings people use to find his site.
Question/search engine string: “How to underwrite brain damage”.
Answer: Carefully.
lifeunderwriter.net 