in the other 40%, it can be caused by a head injury, injury during the birthing process, alcohol and drug abuse, aging or a metabolic or biochemical disturbance or imbalance.

eka 40% leyin’wana, swi nga vangiwa hi ku vaviseka ka nhloko, ku vaviseka hi nkarhi wo velekiwa, ku tirhisa xihoko ni swidzi dziharisi hi ndlela yobiha, ku kula kumbe ku cinca ka miri kumbe nkavanyeto wa bayokhemikali kumbe ku ka u nga tsakanga emirini.
