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:12/8/2016)... 8, 2016 Market Research Future published a half cooked ... Mobile Biometric Security and Service Market is expected to grow over ... Market Highlights: ... Mobile Biometric Security and Service ... increasing need of authentication and security from unwanted cyber threats. The ...
(Date:12/8/2016)... 8, 2016  Singulex, Inc., the leader in Next ... into a license and supply agreement with Thermo Fisher ... provides Singulex access to Thermo Scientific BRAHMS PCT (Procalcitonin), ... is used to diagnose systemic bacterial infection and sepsis ... to aid in assessing the risk of critically ill ...
(Date:12/7/2016)... December 7, 2016 According to a new market research ... Tool (Facial Expression, Voice Recognition), Service, Application Area, End User, And Region - ... grow from USD 6.72 Billion in 2016 to USD 36.07 Billion by 2021, ... Continue Reading ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):
(Date:12/8/2016)... ... 2016 , ... Lajollacooks4u, San Diego’s premier team building events and cooking events ... program offerings and company expansion. , This is largely due to its ... over 30 people. Ever since, Lajollacooks4u has seen significant demand for its services from ...
(Date:12/8/2016)... 8, 2016  Biotheranostics today announced that new ... the Breast Cancer Index (BCI) in identifying which ... most at-risk for disease recurrence and might benefit ... three studies advancing the understanding of the value ... biology and inform decisions related to patient treatment. ...
(Date:12/8/2016)... ... December 08, 2016 , ... Opal ... provide essential device-to-computer interconnect using USB or PCI Express, announced the FOMD-ACV-A4, the ... FOMD-ACV-A4 is a small, thin, SODIMM-style module that fits a standard 204-pin SODIMM ...
(Date:12/8/2016)... ... December 08, 2016 , ... KBioBox llc announced today ... demand KbioBox developed a sophisticated “3 click” gene dditing off target analysis program ... new website, https://www.kbiobox.com/ and powered by the company’s proprietary BioEngine. ...
Breaking Biology Technology: