Cerebrovascular insufficiency of blood supply, i.e., insufficient blood supply to the brain, symptoms can be manifested as dizziness, headache, nausea, limb weakness, fainting, diplopia, blurred vision, aphasia, etc.
Cerebrovascular blood supply insufficiency refers to transient neurological deficits caused by localized cerebral or retinal ischemia and hypoxia.
Symptoms of cerebral blood supply insufficiency are related to the distribution of the affected vessels.
1. Internal carotid artery system
Insufficient blood supply to the middle cerebral artery may result in monoparesis, mild hemiparesis, facial paralysis and lingual paralysis of the limb on the opposite side of the ischemic side, which may be accompanied by hemiplegia and contralateral ipsilateral hemianopsia, aphasia and agnosia. Insufficient blood supply to the anterior cerebral artery may result in personality and affective disorders, and weakness of the contralateral lower limb.
Insufficient blood supply to the ophthalmic branch of the internal carotid artery may result in grayness, cloudiness, or blurred vision in front of the eyes, or even transient darkness and blindness in one eye. Ischemia of the blood-supplying area of the main stem of the internal carotid artery may be manifested as monocular transient blackout, blindness and/or contralateral hemiparesis and sensory deficits, and Horner’s cross palsy (Horner’s sign on the affected side and hemiparesis on the opposite side).
2. Vertebrobasilar system
The most common manifestations are vertigo, balance disorders, abnormal eye movements and diplopia. There may be unilateral or bilateral facial and perioral numbness, alone or with contralateral limb paralysis and sensory disturbances.
When cerebrovascular blood supply insufficiency occurs, it is recommended to seek timely medical treatment and standardize the treatment.