Studies during acute experiences of hallucinations demonstrate increased activity in primary or secondary sensory cortices. As auditory hallucinations are most common in psychosis, most robust evidence exists for increased activity in the left middle temporal gyrus, left superior temporal gyrus, and left inferior frontal gyrus (i.e. Broca's area). Activity in the ventral striatum, hippocampus, and ACC are related to the lucidity of hallucinations, and indicate that activation or involvement of emotional circuitry are key to the impact of abnormal activity in sensory cortices. Together, these findings indicate abnormal processing of internally generated sensory experiences, coupled with abnormal emotional processing, results in hallucinations. One proposed model involves a failure of feedforward networks from sensory cortices to the inferior frontal cortex, which normally cancel out sensory cortex activity during internally generated speech. The resulting disruption in expected and perceived speech is thought to produce lucid hallucinatory experiences.
Zoeken
Chart
Categorieën
- Arts
- Business
- Computers
- Spellen
- Health
- Home
- Kids and Teens
- News
- Recreation
- Reference
- Regional
- Science
- Shopping
- Society
- Sports
- Бизнес
- Дом
- Досуг
- Здоровье
- Игры
- Искусство
- Источники информации
- Компьютеры
- Наука
- Новости и СМИ
- Общество
- Покупки
- Спорт
- Страны и регионы
- World
Read More
Art periods
As long as we humans can use our hands, we create art. From the early cave paintings to the...
The Production Possibilities Frontier
Key Points
The Production Possibilities Frontier (PPF) is a graph that shows all the...
The most famous amusement parks
Amusement parks in the modern world are a favorite vacation spot for families with children, fans...
The structure of costs in the short run
Key points
Looked at from a short-run perspective, a firm’s total costs can...
Collection of jokes about accountants and programmers
Collection of jokes about accountants and programmers
Start the morning with a humorous...