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310 Specific nonpsychotic mental disorders following organic brain damage
Note: This category should be used only for conditions where the form of the
disorder is determined by the brain pathology.
Excludes: neuroses, personality disorders, or other nonpsychotic conditions
occurring in a form similar to that seen with functional
disorders but in association with a physical condition; code
to 300.-, 300.-, etc., and use additional code to identify
the physical condition
310.0 Frontal lobe syndrome
Changes in behavior following damage to the frontal areas of the brain or
following interference with the connections of those areas. There is a general
diminution of self-control, foresight, creativity and spontaneity, which may
be manifest as increased irritability, selfishness, restlessness and lack of
concern for others. Conscientiousness and powers of concentration are often
diminished, but measurable deterioration of intellect or memory is not
necessarily present. The overall picture is often one of emotional dullness,
lack of drive and slowness; but, particularly in persons previously with
energetic, restless or aggressive characteristics, there may be a change
towards impulsiveness, boastfulness, temper outbursts, silly fatuous humour,
and the development of unrealistic ambitions; the direction of change usually
depends upon the previous personality. A considerable degree of recovery is
possible and continue over the course of several years.
Lobotomy syndrome Postleucotomy syndrome [state]
Excludes: postcontusional syndrome (310.2)
310.1 Cognitive or personality change of other type
Chronic, mild states of memory disturbance and intellectual deterioration,
often accompanied by increased irritability, querulousness, lassitude and
complaints of physical weakness. These states are often associated with old
age, and may precede more severe states due to brain damage classifiable under
dementia of any type (290.-,and 294.-) or any condition in 293.-(Transient
organic psychotic conditions).
Mild memory disturbance
Organic psychosyndrome of nonpsychotic severity
310.2 Postconcussional syndrome
States occurring after generalized contusion of the brain, in which the
symptom picture may resemble that of the frontal lobe syndrome (310.0) or that
of any of the neurotic disorders (300.0-300.9), but in which in addition,
headache, giddiness, fatigue, insomnia and a subjective feeling of impaired
intellectual ability are usually prominent. Mood may fluctuate, and quite
ordinary stress may produce exaggerated fear and apprehension. There may be
marked intolerance of mental and physical exertion, undue sensitivity to
noise, and hypochondriacal preoccupation. The symptoms are more common in
persons who have previously suffered from neurotic or personality disorders or
when there is a possibility of compensation. This syndrome is particularly
associated with the closed type of head injury when signs of localized brain
damage are slight or absent, but it may also occur in other conditions.
Postcontusional syndrome (encephalopathy)
Post-traumatic brain syndrome, nonpsychotic
Status postcommotio cerebri
Excludes: frontal lobe syndrome (310.0)
postencephalitic syndrome (310.8)
any organic psychotic conditions following head injury
(290.- to 294.0)
310.8 Other
Include here disorders resembling the postcontusional syndrome(310.2),
associated with infective or other diseases of the brain or surrounding
tissues.
Other focal (partial) organic psychosyndromes
310.9 Unspecified
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