The intellectual impairment in multi-infarct dementia sometimes involves only certain specific, limited cognitive functions, such as difficulties with calculation and naming. The general reasoning and judgment can remain intact for a considerable period of time, and they are often able to detect these impairments and actively seek medical attention or make efforts to compensate for them, hence the term “mesh-like dementia”. So, what are the screening tests for reticular dementia? Here is a brief introduction. 1, mainly through the patient’s daily life and social ability assessment and neuropsychological testing, commonly used simple mental state examination scale (MMSE), Wechsler Adult Intelligence Scale (WAIS-RC), Clinical Dementia Rating Scale (CDR) and Blessed Behavior Scale (BBBS), etc., Hachinski Ischemic Score (HIS) scale can be distinguished from degenerative dementia. Neuroimaging (1) CT scan: It can show multiple low-density infarct foci of varying sizes in the cerebral cortex and cerebral white matter, leukoaraeosis and cerebral atrophy in a halo-like low-density area next to the body of the lateral ventricle. (2) MRI examination: multiple T1WI low signal and T2WI high signal in bilateral basal nuclei, cerebral cortex and white matter; old lesions are well-defined, with low signal and no obvious occupancy effect; fresh lesions are poorly defined, with insignificant signal intensity; early T1WI changes may not be obvious; T2WI may show lesions; limited brain atrophy or whole brain atrophy in brain tissue around lesions. 3.Electrophysiological examination (1) EEG examination: EEG of normal elderly people mainly shows slowed down alpha rhythm, alpha rhythm slowed down from 10-11Hz in young and strong age to 9.5Hz in old age, and slow wave of 3-8Hz in temporal area; diffuse theta or delta activity in bilateral frontal and central areas, especially in sleepy state significantly suggests brain aging; on the basis of EEG changes caused by multiple cerebral infarction lesions alpha rhythm further slowed down to below 8-9 Hz, and diffuse theta waves appeared in the frontal, temporal and central regions bilaterally, accompanied by focal paroxysmal high-amplitude delta rhythm. (2) Evoked potentials: both MEP and SEP show prolonged latency and decreased wave amplitude, with a positive rate of 80% to 90% or more in large cerebral infarcts and 30% to 50% in small focal infarcts; in about 40% of patients with occipital lobe infarcts resulting in cortical blindness, VEP can show abnormal waveforms and prolonged latency time frame, and the VEP waveforms improve significantly after visual recovery; the abnormal BAEP in ischemic stroke The detection rate of BAEP in ischemic stroke is 20%-70%, showing delayed interpeak latency (IPL) from I to V. In patients with brainstem infarction, the BAEP is abnormal bilaterally, with disappearance of waveforms from IV to V and prolonged absolute latency (PL).