記憶障害Memory impairment.

意識障害Disturbance of consciousness.

片方の手足がしびれるOne limb is numb.

言葉がうまく話せないI can't speak that language well.

頭の一部が痛いPart of my head hurts.

頭を打ったHit the head.

頭痛がするI have a headache.

頭に関する症状Head symptoms.