In adult male person presents with drowsiness, veigo & unconsciousness which aery is involved

Aneurysms of the posterior cerebral aery (PCA) represent approximately 1% of all intracranial aneurysms (1-4). The surgical approach and dissection of the PCA is technically challenging owing to the complexity of its perforating branches and their intimate relationship with the cranial nerves and upper brain stem Of the five giant serpentine aneurysms of the PCA, four presented with a constellation of symptoms related primarily to the associated mass effect on the adjacent temporal lobe and optic tract, ie, seizures, memory loss, and incongruous hemianopsia Ref Harrison20th edition pg 2345