Reversible cerebral vasoconstriction syndrome - The Symptoms

I. Stroke is a result of a blockage in the blood vessels (ischemic stroke) or bleeding (hemorrhagic stroke) of that associated ischemic stroke, transient ischemic attack, or non-traumatic intracranial hemorrhage, including intracerebral and subarachnoid hemorrhage, etc. according to "Headache attributed to stroke, TIA, intracerebral haemorrhage, or vascular malformation" by Carolei A, Sacco S.(1)

II. A headache or cephalalgia is defined as a condition of pain in the region around the head or neck. Normally, it is a symptom of a number of different effects of certain diseases or the head and neck themselves. High headache impact was proven to be associated with worse academic performance.

III. Reversible cerebral vasoconstriction syndrome (RCVS)
Reversible cerebral vasoconstriction syndrome, sometimes called Call-Fleming syndrome is defined as a condition of disease of the arteries of which the brain develops a blood vessels spasm that leads to multifocal arterial constriction and dilation, causing the sudden onset of a severe headache (2)
1. Does stroke causes headache?
A sudden severe headache or recurrent of thunderclap headache may be a beginning of a stroke as a result of a hemorrhagic stroke.
 
2. Does headache causes stroke?
Cerebral vasoconstriction due to severe headache may cause completely stop blood flow to a portion of the brain, causing stroke if the blood vessel can not relax fast for blood to flow again(2)

II. Symptoms
1. Sudden-onset thunderclap headache or recurrent severe headache
2. Dysarthria
Dysarthria is defined as a condition of motor speech disorder resulting from neurological injury of the motor component of the motor-speech system due to the can spontaneously constriction of and relax back and forth over a period of time of cerebral arteries.
3. Nausea, Vomiting, Photophobia, Confusion and Blurred vision(3)
4. Unsteady movement of the limbs
5. Overactive or overresponsive reflexes
As a result of upper motor neuron damage causes of focal neurological symptoms.
6. Etc.
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Sources
(1) http://www.ncbi.nlm.nih.gov/pubmed/20816453
(2) http://www.ncbi.nlm.nih.gov/pubmed/19220301 
(3) http://www.ncbi.nlm.nih.gov/pubmed/20936928