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Frontal lobe syndrome can be caused by a range of conditions including head trauma, tumours, neurodegenerative diseases, neurodevelopmental disorders, neurosurgery and cerebrovascular disease. Frontal lobe impairment can be detected by recognition of typical signs and symptoms, use of simple screening tests, and specialist neurological testing.
Hypofrontality is a symptom of numerous neurological diseases defined as reduced utilization of glucose and blood flow in the prefrontal cortex. Hypofrontality can be difficult to detect under resting conditions, but under cognitive challenges, it has been seen to correlate with memory deficits along with executive function deficits.
The prefrontal lobe in humans has been associated both with metacognitive executive functions and emotional executive functions. [32] Theory and evidence suggest that the frontal lobes in other primates also mediate and regulate emotion, but do not demonstrate the metacognitive abilities that are demonstrated in humans. [32]
In case of treating depression, tDCS currents specifically target the left side of dorsolateral prefrontal cortex (DLPFC) located in the frontal lobe. Left DLPFC has been shown to be associated with lower activity in the depressed population. [27] [11] tDCS is able to achieve cortical changes even after the stimulation is ended.
This is a shortened version of the fifth chapter of the ICD-9: Mental Disorders.It covers ICD codes 290 to 319.The full chapter can be found on pages 177 to 213 of Volume 1, which contains all (sub)categories of the ICD-9.
The most frequent cause of the syndrome is brain damage to the frontal lobe. Brain damage leading to the dysexecutive pattern of symptoms can result from physical trauma such as a blow to the head or a stroke [6] or other internal trauma. It is important to note that frontal lobe damage is not the only cause of the syndrome.
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