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:3/23/2017)... , Mar. 23, 2017 Research and Markets ... Market Analysis & Trends - Industry Forecast to 2025" report ... ... at a CAGR of around 8.8% over the next decade to ... report analyzes the market estimates and forecasts for all the given ...
(Date:3/22/2017)... YORK , March 21, 2017 ... Marketing Cloud used by retailers such as 1-800-Flowers ... its platform — Product Recommendations and Replenishment. Using Optimove,s ... give more personalized product and replenishment recommendations to ... but also on predictions of customer intent drawn ...
(Date:3/20/2017)... March 20, 2017 At this year,s CeBIT Chancellor ... biometrics manufacturer DERMALOG. The Chancellor came to the DERMALOG stand together with ... this year,s CeBIT partner country. At the largest German biometrics company the ... fingerprint, face and iris recognition as well as DERMALOG´s multi-biometrics system.   ... ...
Breaking Biology News(10 mins):
(Date:5/23/2017)... ... May 23, 2017 , ... ... its 20th anniversary, marking the occasion with a strong presence at Bio-IT World ... Reception and further extends an invitation to all attendees to view posters ...
(Date:5/23/2017)... MENLO PARK, CA (PRWEB) , ... May 23, 2017 , ... ... announced the publication of “Label-free isolation of prostate circulating tumor cells using Vortex ... publication is the result of a collaboration with Dr. Dino Di Carlo and Dr. ...
(Date:5/23/2017)... ... 23, 2017 , ... Bacterial biofilms, surface adherent communities of bacteria that are ... from food poisoning and catheter infections to gum disease and the rejection of medical ... of dollars per year, there is currently a paucity of means for preventing their ...
(Date:5/22/2017)... Boston, MA (PRWEB) , ... May 22, 2017 , ... ... evidence, has expanded to the East Coast. It has opened an office in downtown ... innovative therapies are finding it increasingly more important to generate evidence on the value ...
Breaking Biology Technology: