Depending on the location of the ischemic focus, the clinical symptoms may vary.1. If the left frontal lobe is occluded, patients may have incomplete or complete motor aphasia, right upper limb or right lower limb paresis, and some patients may have focal epilepsy or persistent seizures.2. If the left ischemic focus is in the left basal ganglia, patients may have incomplete or complete right limb If the left ischemic foci manifest in the left basal ganglia region, the patient will have incomplete or complete paralysis of the right limb, accompanied by superficial sensory loss of the right upper and lower limbs. The pathological signs of the right lower extremity can be positive when the patient’s pathological signs are checked.3. If the cerebellar infarction is in the left side of the brain, the patient may show dizziness and unstable walking, and the finger-nose test of the left upper extremity or the heel-knee-shin test of the left lower extremity may not be allowed, so the danger of left cerebral ischemic foci is mainly determined by the left cerebral ischemic site.