PSY 30312 Chapter Notes - Chapter 8: Prefrontal Cortex, Basal Ganglia, Cerebral Cortex
Document Summary
Pregnancy, birth, and early development: defects during pregnancy (low birth weight, maternal exposure to environmental toxins, stress during pregnancy, etc. ) Neurobiological factors: substantial support for neurobiological causal factors: Differences in psychophysiological measures suggest diminished arousal. Differences on measures of brain activity during vigilance tests suggests under responsiveness to stimuli and deficits in response to inhibition. Difference in blood flow to the prefrontal regions of the brain and the pathways connecting these regions to the limbic system and cerebellum suggests decreased blood flow to these regions. Brain abnormalities: abnormalities primarily in the frontostriatal circuitry of the brain. This region consists of the prefrontal cortex and interconnected areas of gray matter located deep below the cerebral cortex, collectively known as the basal ganglia. Areas associated with attention, executive functions, delayed responding, and response organization. Lesions in this area result in symptoms similar to adhd.
