<unk>  or<unk>  cerebral infarct (LACI) is the most common type of ischemic stroke, resulting from the occlusion of small penetrating arteries that provide blood to the brain's deep structures. Patients who present with symptoms of a<unk> , but who have not yet had diagnostic imaging performed, may be described as suffering from<unk>  syndrome (LACS). Much of the current knowledge of<unk> s comes from C. Miller Fisher's cadaver dissections of post-mortem stroke patients. He observed "lacunae" (empty spaces) in the deep brain structures after occlusion of 200–800 μm penetrating arteries and connected them with five classic syndromes. These syndromes are still noted today, though<unk>  infarcts are diagnosed based on clinical judgment and radiologic imaging.
Lacunar stroke
Watershed stroke
Posterior circulation infarct
Posterior cerebral artery syndrome
Middle cerebral artery syndrome
Anterior cerebral artery syndrome
Silent stroke
ROSAH syndrome