# Brain question **URL:** \ **Category:** Factual Questions\ **Created:** [July 29, 2001, 6:43pm UTC](https://boards.straightdope.com/t/brain-question/74171 "2001-07-29T18:43:27Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Gomez](https://avatars.discourse-cdn.com/v4/letter/g/d78d45/32.png) [@Gomez](https://boards.straightdope.com/u/Gomez)\ **Post date:** [July 29, 2001, 6:43pm UTC](https://boards.straightdope.com/t/brain-question/74171/1 "2001-07-29T18:43:27Z")
Can brain aneurysms be caused by a knock to the head? I reckon they can but I aint sure. Cheers! ---
**Author:** ![Qadgop\_the\_Mercotan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/qadgop_the_mercotan/32/83_2.png) [@Qadgop\_the\_Mercotan](https://boards.straightdope.com/u/Qadgop_the_Mercotan)\ **Post date:** [July 29, 2001, 6:51pm UTC](https://boards.straightdope.com/t/brain-question/74171/2 "2001-07-29T18:51:48Z")
Sometimes. [http://www.ninds.nih.gov/health\_and\_medical/disorders/ceraneur\_doc.htm](http://www.ninds.nih.gov/health_and_medical/disorders/ceraneur_doc.htm) explains it ---
**Author:** ![kinoons](https://avatars.discourse-cdn.com/v4/letter/k/a698b9/32.png) [@kinoons](https://boards.straightdope.com/u/kinoons)\ **Post date:** [July 29, 2001, 7:42pm UTC](https://boards.straightdope.com/t/brain-question/74171/3 "2001-07-29T19:42:11Z")
wow qadgop is on top of his game today – nice link, much more succinct than I could have been. ---
**Author:** ![Gomez](https://avatars.discourse-cdn.com/v4/letter/g/d78d45/32.png) [@Gomez](https://boards.straightdope.com/u/Gomez)\ **Post date:** [July 29, 2001, 7:50pm UTC](https://boards.straightdope.com/t/brain-question/74171/4 "2001-07-29T19:50:56Z")
Thanks. Additional question: If one sustains an aneurysm from a head injury, how long have they got before they know about it, if they know about it at all? ---
**Author:** ![kinoons](https://avatars.discourse-cdn.com/v4/letter/k/a698b9/32.png) [@kinoons](https://boards.straightdope.com/u/kinoons)\ **Post date:** [July 29, 2001, 8:01pm UTC](https://boards.straightdope.com/t/brain-question/74171/5 "2001-07-29T20:01:59Z")
it all depends on how bad the aneurysm is, the location of the aneurysm, so on and so forth… ---
**Author:** ![Qadgop\_the\_Mercotan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/qadgop_the_mercotan/32/83_2.png) [@Qadgop\_the\_Mercotan](https://boards.straightdope.com/u/Qadgop_the_Mercotan)\ **Post date:** [July 29, 2001, 8:04pm UTC](https://boards.straightdope.com/t/brain-question/74171/6 "2001-07-29T20:04:06Z")
Depends. For it to be detected, it has to show symptoms. For it to show symptoms, it either has to leak, or enlarge so much it presses on adjacent structures. If it leaks too fast, the presenting symptoms are usually headache, coma, then death. Often within minutes. If it’s pressing something vital, it depends on what it’s pressing on, and how hard. If a cerebral aneurysm is a concern for you or someone close to you, a discussion with a doctor might be the best way to get the facts. ---
**Author:** ![Qadgop\_the\_Mercotan](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/qadgop_the_mercotan/32/83_2.png) [@Qadgop\_the\_Mercotan](https://boards.straightdope.com/u/Qadgop_the_Mercotan)\ **Post date:** [July 29, 2001, 8:05pm UTC](https://boards.straightdope.com/t/brain-question/74171/7 "2001-07-29T20:05:22Z")
wow kinoons is on top of his game today – nice response, much more succinct than I would have been. ---
**Author:** ![kinoons](https://avatars.discourse-cdn.com/v4/letter/k/a698b9/32.png) [@kinoons](https://boards.straightdope.com/u/kinoons)\ **Post date:** [July 29, 2001, 8:13pm UTC](https://boards.straightdope.com/t/brain-question/74171/8 "2001-07-29T20:13:39Z")
> [@](#): > > \*Originally posted by Qadgop the Mercotan \* > \*\*wow kinoons is on top of his game today – nice response, much more succinct than I would have been. > \*\* wow, thanks 😉 ---
**Author:** ![Neurodoc](https://avatars.discourse-cdn.com/v4/letter/n/848f3c/32.png) [@Neurodoc](https://boards.straightdope.com/u/Neurodoc)\ **Post date:** [July 31, 2001, 4:47am UTC](https://boards.straightdope.com/t/brain-question/74171/9 "2001-07-31T04:47:46Z")
Vascular malformations may be caused by trauma, but the formation of a post-traumatic aneurysm is less likely than the formation of an “ateriovenous malformation” (AVM).