The refusal to use the helmet when one is riding a motorbike pose the person to several risk. Mostly the helmet gives one the protection from having head injury or minimize the effect when there is crush on the brain. Let take into consideration when one fall there is possibility that one will land at their back with the back of the head or side to hit the ground where the medulla and the cerebellum are located, looking at the vital activities controlled by the medulla, it is not surprising that injury to the medulla from a hard hit to the back of the head or



upper neck such as falling back on ice can be fatal. Damage to the medullary rhythmicity area is particularly serious and can rapidly lead to death. Symptoms of nonfatal injury to the medulla may include cranial nerve malfunctions on the same side of the body as the injury, paralysis and loss of sensation on the opposite side of the body, and irregularities in breathing or heart rhythm.

Damage to the cerebellum through trauma or disease disrupts muscle

coordination, a condition called ataxia. Blindfolded people with ataxia cannot touch the tip of their nose with a finger because they cannot coordinate movement with their sense of where a body part is located. Another sign of ataxia is changed speech pattern due to uncoordinated speech muscles. Cerebellar damage may also result in staggering or abnormal walking movements

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