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Higher Brain Dysfunction

What is Higher Brain Dysfunction?

If you encounter a traffic accident and lose your consciousness by striking your head, even if your consciousness recovers, your character may change, or your memory and attention may degrade, causing difficulties in your daily life and social life.

(1) Degraded cognitive capacity

Cause of extremely poor memory

So-called memory and memory impairments, such as the inability to remember dates, important locations, names of people, the inability to remember recent events, and inability to remember the daily schedule

Attention disorders

Symptoms include a lack of attention and interest in the people and events around you, making of many simple mistakes, easy to get distracted, cannot do two things at the same time

Disabilities in functional performance


The judgment is extremely low and can't do what have planned by myself, can't do it without people's instructions,  can't meet the promised time, etc.

(2)Change in personality

(3)Physical symptoms

Instability when standing and walking

This is said to occur if the head is strongly struck due to a traffic accident and the brain is damaged for a certain period of time, causing brain contusion, subarachnoid hemorrhage, diffuse axonal damage etc... resulting in damage to the brain, and loss of consciousness for a certain period of time.

The main elements that are referred to when identifying aftereffects are as follows.

  • Degree of consciousness impairment at the time of the accident
  • Head MRI, CT images from immediately after an accident
  • EEG, intelligence tests, tests for dementia, psychological test, neurological test
  • Changes in the victim's daily life status, career status, and social life before and after the accident (this should be checked by physicians, families, caregivers, etc.)
  • In the case of physical symptoms, the extent and degree of paralysis, whether or not the patient was cared for, and the degree of paralysis.

Grading includes not separating cognitive impairment, personality change, and physical dysfunction, but comprehensively evaluating the degree of work and daily life limitations.

For example, if the disability is severe, the person is in a state of bedridden or wheelchair life due to severe dementia and quadriplegia, and the movement around him/her that is necessary for maintaining his/her life always requires the care of another person, the disability is classified in Class I, Item 1, according to the level of disability aftereffects of the liability insurance.