National Dental Examining Board of Canada (NDEB) Practice Exam

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Which brain structure may be associated with nocturnal bruxism?

  1. Amygdala

  2. Hippocampus

  3. Basal ganglia (nigrostriatal)

  4. Cerebellum

The correct answer is: Basal ganglia (nigrostriatal)

Nighttime teeth grinding, also known as nocturnal bruxism, has been associated with the basal ganglia, specifically the nigrostriatal pathway. This area of the brain is responsible for voluntary movements, including those related to the jaw and facial muscles. Other options like the amygdala, hippocampus, and cerebellum are not directly related to motor function and therefore less likely to be associated with nocturnal bruxism.

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