the goal of this type of study : observation study is to learn about cerebral edema and hematoma in aneurysmal subarachnoid hemorrhage the main questions it aims to answer are current clinical practices lack predictive models to identify early structural brain abnormalities affecting cognition.

the development of a predictive model termed the a-SAH Early Brain Edema/Hematoma Compression Neural (Structural Brain) Networks Score System (SEBE-HCNNSS).

Inclusion Criteria: first-ever stroke, diagnosed with SAH via CT scan within 24 - 48 hours or lumbar puncture; 2) age between 18 and 70 years; 3) Confirmation of cerebral aneurysm by digital subtraction angiography (DSA) and/or CT angiography (CTA); 4) absence of neurological or psychiatric disease history and each unruptured intracranial aneurysm patient must be admitted to the hospital in excellent preoperative and pre-interventional condition; 5) Informed consent is signed by the patient and/or family. 6)Clinical diagnosis of Alzheimer's Disease Must be able to swallow tablets.

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Exclusion Criteria: 1) patients over 70 years old; 2) presence of neurological focal deficits or severe aphasia; 3) cognitive dysfunction or history of cognitive decline including craniotomy, antipsychotics, neurodegenerative diseases, and chronic subdural hematoma; 4) concurrent acute or chronic infections, corneal or pupillary abnormalities, severe autoimmune or systemic diseases such as rheumatic illnesses of the musculoskeletal system; 5) concurrent severe organic dysfunction; 6) patients with recurrent aneurysms or aneurysms not first diagnosed in our hospital; 7) diagnosis of major psychosis according to the Diagnostic and Statistical Manual of Mental Disorders, 4th Edition criteria 8)Insulin dependent diabetes,9)Thyroid disease

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