Frontal Lobe
Motor function, memory, personality, organizing, problem solving

The frontal lobes are involved in motor function, problem solving, spontaneity, memory, language, initiation, judgment, impulse control and social and sexual behavior. They are considered our center for emotion and personality function. The position at the front of the cranium makes the frontal lobes extremely vulnerable to injury. MRI studies have shown that the frontal area is the most common region of injury following mild to moderate traumatic brain injury.
There are two sides of the frontal lobe.
The left side controls language related movement
The right frontal lobe assists in non verbal ability
But this two sided rule is not absolute, both sides are often involved in all behavior.
Damage to the frontal lobe can cause
  • Changes in IQ testing results
  • “behavioral spontaneity” displayed fewer spontaneous facial movements and spoke fewer words (left frontal lesions) or excessively displayed spontaneous facial movements and spoke words (right front lesions)
  • Difficulty interpreting the environment (difficulty using cues to guide behavior)
  • Difficult perceiving space, including own body in a space
  • Dramatic change in social behavior
  • Left frontal damage usually manifests as pseudodepression
  • Right frontal damage manifests into pseudopsychopathic
A Rotman Researach Institute/ University of Toronto study found that damage to the right frontal lobe affected a person’s humor. In the study people with this damage had a hard time comprehending a punch line and preferred slapstick comedy. This study is the first to show that the frontal lobe plays a role in our ability to enjoy humor and have a good laugh.