The study will be conducted:
To investigate the effect of high-power laser on myoelectrical activities of suboccipital muscles in patients with cervicogenic headache.
* To investigate the effect of high-power laser on pain in patients with cervicogenic headache. * To investigate the effect of high-power laser on quality of life in patients with cervicogenic headache.
Patients suffering from cervicogenic headache based on international headache society "IHS" criteria for cervicogenic headache.
Unilateral cervical radiculopathy (Upper cervical C1 -C4).
Age ranged from 30 to 50 years.
Neck pain referring unilaterally to suboccipital region.
Cervical myelopathy, cervical instability, cervical fracture cervical surgery with evidence of pyramidal, posterior column disorders.
History of any neurologic disease ( stroke, MS , cerebellar disorders , vestibular dysfunction and neuropathy )Pregnant or breastfeeding women
Other types of headaches (migraine - cluster headaches- tension headache)
Patients of systemic diseases such as rheumatoid arthritis