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III. Brain Fatigue.
The replies in regard to cerebral or brain fatigue furnish the following figures:
Total of affirmative replies: 2142 for the whole Kingdom. This is 10.80 % of the 19661 positive replies.
The total is divided as follows:
1 148 boys (= 9.21 %); 994 girls (= 13.81 %).
Large towns Smaller localities
Boys Girls Boys Girls
942 84O 206 154
10.20% 15.23% 3-38% 9-i6 %
An examination of these figures yields the following conclusions:
1. Brain fatigue is felt much less frequently than visual or bodily fatigue — visual 6490 (33.03 %), bodily 2831 (14.44 %)> cerebral 2142 (10.80 %).
2. As in the case of the other two forms, a higher proportion of girls than boys experience cerebral fatigue, not only altogether, but even when divided according to large towns and smaller localities.
3. The large towns contribute noticeably more towards mental fatigue than the smaller localities.
4. Technical and classical schools furnish a higher proportion of victims than elementary and vocational schools.
5. Taking the three age-groups, cerebral fatigue is felt more among adolescents of both sexes than among younger children.
Here, as with bodily fatigue, the age at which mental or cerebral fatigue is felt coincides in the main with the period of adolescent growth and the greater physiological strain upon the organism.
* * *
Numerous causes are given by the children to explain the cerebral fatigue complained of. These may all be summed up in one central manifestation — nervous headache (hemicrania) in its various forms (nausea, mental confusion or stupor due to a long or tiring projection). The symptoms are expressed in the following terms, chosen from among many answers:
" Complicated films are tiring and confuse the brain ".
" Too complicated a plot is a strain on the nerves ".
" Excessive movement by the figures on the screen causes headache ".
" Very long films are confusing to the mind ".
" After a long film I feel dazed ".