Navigation Links
Internal body clock dictates timing of different types of stroke

The internal body clock, or circadian rhythm, seems to influence the timing of different types of stroke, suggests research published ahead of print in the Journal of Neurology Neurosurgery and Psychiatry.

The research team analysed data from almost 13,000 patients who had had one of three types of stroke for the first time, diagnosed by brain scan.

These patients' data had been collected on a stroke register, showing that cerebral infarction, where blood flow to brain arteries is restricted, was the most common type of stroke. The rate was 89 per 100,000 of the population.

Subarachnoid haemorrhage, where bleeds occur in the arteries at the brain's surface, was the least common type at 18 per 100,000 of the population. Intracerebral haemorrhage, where bleeds occur within the brain, numbered 45 per 100,000 of the population.

Where the timing of the stroke was recorded as either during waking hours or during sleep, the researchers looked for any obvious patterns among the different types, by dividing the wake-sleep cycle into 12 two hour intervals.

Men tended to be around five years younger than women for all the different types, but there was little variation between the sexes in respect of the timing of the various types of stroke.

All three stroke types registered two peaks during the day, one between 6 and 8 in the morning and the other between 6 and 8 in the evening, with a significant dip in the numbers of strokes occurring during sleep.

But closer analysis showed that cerebral infarction had a higher peak in the morning and a lower peak in the afternoon than the other two.

Intracerebral haemorrhage and subarachnoid haemorrhage, on the other hand, were more likely to have lower peaks in the morning and higher peaks in the afternoon than cerebral infarction.

Around one in five cases of cerebral infarction occurred during sleep, with most cases concentrated in the period immediately before waking up, although the stroke would probably have begun earlier, say the authors.

Sleep lowers blood pressure in the body, so cuts the risk of stroke, but low blood pressure is a risk factor for cerebral infarction, say the authors.
'"/>

Source:BMJ Specialty Journals


Related biology news :

1. What Makes The Brain Tick, Tick, Tick: Researchers Gaining New Insights Into Brains Internal Clock
2. NYU researchers simulate molecular biological clock
3. Glow-in-the-dark zebrafish at UH hold keys to biological clocks
4. After a time-shift, mixed signals from the circadian clock
5. The circadian clock: Understanding natures timepiece
6. Discovery clarifies role of peptide in biological clock
7. Temperature regulates circadian clock in zebrafish
8. Travelers can avoid jet lag by resetting their body clocks
9. More evidence mammals, fruit flies share make-up on function of biological clocks
10. Novel connection found between biological clock and cancer
11. A surprise about our body clock

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/30/2017)... 30, 2017  On April 6-7, 2017, Sequencing.com will ... hackathon at Microsoft,s headquarters in ... focus on developing health and wellness apps that provide ... the Genome is the first hackathon for personal ... largest companies in the genomics, tech and health industries ...
(Date:3/29/2017)... 29, 2017  higi, the health IT company that ... North America , today announced a Series B ... of EveryMove. The new investment and acquisition accelerates higi,s ... to transform population health activities through the collection and ... higi collects and secures data today on behalf ...
(Date:3/24/2017)... Controller General of Immigration from Maldives Mr. Mohamed Anwar and ... international IAIR Award for the most innovative high security ePassport and eGates  ... ... Maldives Immigration Controller General, Mr. Mohamed Anwar ... right) have received the IAIR award for the "Most innovative high security ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is back for ... June 2018 in San Francisco, CA. The Summit brings together current and former FDA ... board directors and government officials from around the world to address key issues in ...
(Date:10/11/2017)... a leading provider of patient support solutions, has announced the ... which will launch this week. The VMS CNEs will address ... enhance the patient care experience by delivering peer-to-peer education programs ... to help women who have been diagnosed and are being ... ...
(Date:10/11/2017)... ... 2017 , ... Disappearing forests and increased emissions are the main causes of ... year. Especially those living in larger cities are affected by air pollution related diseases. ... most pollution-affected countries globally - decided to take action. , “I knew I had ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh ... orphan drug designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of ... SBT-100 is able to cross the cell membrane and bind intracellular STAT3 and ...
Breaking Biology Technology: