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brain anatomy

Frontal Lobe

The frontal lobe can be subdivided into two main areas. These areas include the prefrontal cortex and the motor cortex. The motor cortex contains the premotor cortex and primary motor cortex.

The anterior (front) portion of the frontal lobe is called the prefrontal cortex. It is very important for the “higher cognitive functions” and the determination of the personality and the planning of complex cognitive behaviors.

The posterior (back) of the frontal lobe consists of the premotor and motor areas. Nerve cells that produce movement are located in the motor areas. The premotor areas serve to modify movements.

Starting from the central sulcus and working forward, we first have the motor cortex, which sends its signals down to the body to control the skeletal muscles.

A few areas of the prefrontal cortex are at least partially understood.  The dorsolateral area (high and to the sides) appears to allow us to hold ideas in awareness, focus on them, and even manipulate them.

The ventromedial area (low and close to the midline) seems to be involved in emotional experience and provides us with the feeling that things make sense and have meaning.  Low levels of activity here are associated with depression:  Nothing makes any sense.  High levels, on the other hand, are associated with mania:  Every little thing is full of importance!

The frontal lobe can be subdivided into two main areas. These areas include the prefrontal cortex and the motor cortex. The motor cortex contains the premotor cortex and primary motor cortex.

The orbital area of the prefrontal cortex (just above the eyeballs) tells us when something is wrong and requires serious attention.  It also has the ability to inhibit behaviors that are inappropriate, such as those that are harmful to us or are socially unacceptable.  This includes the ability to counteract the signals for aggression from the amygdala in the limbic system.  It is believed that many violent criminals have had damage to this area of the brain.

In the most frontal part of the prefrontal lobe is an area devoted to interpreting people’s intentions and motives.  Autistic people seem to have some sort of defect in this location.

ALSO READ :   Autism Spectrum Disorders (ASD)

Functions Of Frontal Lobe

The frontal lobes are the largest brain lobes and are involved in several functions of the body including:

  • Motor Functions
  • Higher Order Functions
  • Planning
  • Reasoning
  • Judgment
  • Impulse Control
  • Memory
  • Language and Speech

The right frontal lobe controls activity on the left side of the body and the left frontal lobe controls activity on the right side.

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