[5] The frontal lobe plays a key role in executive functions such as motivation, planning, social behaviour, and speech production.

Some of the latest imaging research[10] on frontal cortex areas suggests that executive functions may be more discrete than was previously thought.

[1] On mental state examination a person with frontal lobe damage may show speech problems, with reduced verbal fluency.

[4] Typically the person is lacking in insight and judgment, but does not have marked cognitive abnormalities or memory impairment (as measured for example by the mini-mental state examination).

For example, concept formation and ability to shift mental sets can be measured with the Wisconsin Card Sorting Test, planning can be assessed with the Mazes subtest of the WISC.

[4] In terms of treatment for frontal lobe disorder, there is none, general supportive care is given, also some level of supervision could be needed.

[21] In December 2005, at his Dover Road flat in Singapore, 44-year-old caretaker Mohammad Zam Abdul Rashid attacked and battered his 38-year-old wife Ramona Johari (a production operator) to death after he accused her of getting close to a colleague.

Mohammad Zam was originally charged with murder but after he was found to be suffering from frontal lobe syndrome, which went undiagnosed prior to the murder and had affected his mental responsibility at the time of the killing, Mohammad Zam was convicted of a reduced charge of manslaughter and hence sentenced to life imprisonment.