Migraines start in eyes' light cells
Scientists may have found why many migraine sufferers are sensitive to light. Specialised nerve cells in the eye appear to trigger migraine headaches even in people who are registered blind.
About 85 per cent of migraine sufferers are "photophobic", meaning they react badly to light. Scientists studied photophobia in two groups of blind people. One was unable to detect light, while the other, though legally blind and unable to discern images, could detect light and was susceptible to photophobia.
"While the patients in the first group did not experience worsening of their headaches from light exposure, the patients in the second group described intensified pain when they were exposed to light, in particular blue or grey wavelengths," said Professor Rami Burstein of Harvard Medical School, who led the study, published in Nature Neuroscience.
The scientists found that specialised cells in the retina of the eye, called melanopsin photoreceptors, are involved in sending signals to the brain along the optic nerve. These cells can trigger migraine headaches and are the only functioning light-sensitive cells left in the people who are partially blind.
- 1 Al Pacino on suffering from depression: 'It can last and it's terrifying'
- 2 Half of young women unable to ‘locate vagina’ and 65% find it difficult to say the word
- 3 Saudis risk new Muslim division with proposal to move Mohamed’s tomb
- 4 A teacher speaks out: 'I'm effectively being forced out of a career that I wanted to love'
- 5 Mexican woman becomes world’s 'oldest person' at 127
Perez Hilton apologises for publishing Jennifer Lawrence naked photo leak
Jennifer Lawrence 'nude photo hacker' claims there are hundreds more celebrity images to come
Victoria Justice on naked photo leak: 'Let me nip this in the bud right now – pun intended'
Saudis risk new Muslim division with proposal to move Mohamed’s tomb
Ariana Grande nude photos leak: Pictures are completely fake, say singer's representatives
Rotherham child sex abuse scandal: Labour Home Office to be probed over what Tony Blair's government knew - and when
What do immigrants really think of Britain? Polish immigrant's Reddit post goes viral
Ashya King: Parents of five-year-old boy refused permission to visit him in hospital and denied bail at Spanish court
With Douglas Carswell joining Ukip, my party has taken another giant step forward
When elitism grips the top of British society to this extent, there is only one answer: abolish private schools
Ukip Douglas Carswell defection: Tory MP jumps ship to join Nigel Farage
£90 - £160 per day: Randstad Education Birmingham: We are currently recruiting...
£30000 - £37000 per annum + attractive benefits: Ashdown Group: .NET Developer...
Main Pay Scale : Randstad Education Leeds: Biology Teacher to A Level - Female...
£26000 Per Annum: The Green Recruitment Company: Job Title: SAP Assessor Job T...