Basal Ganglia

Question 1

What/were are the basal ganglia?

Answer 1

tightly woven group of nuclei in cerebrum, diencephalon, and midbrain

Question 2

What does the BG regulate?

Answer 2

• frontal lobe, motor, and limbic fxn

Question 3

What types of disorders are associated?

Answer 3

• neurodegenerative and
• neuropyschiatric disorders
  
  • disorders of “habit” (addiction, obsession-compulsive disorders, tics)
• movement disorders / extrapyramidal disorders

Question 4

What frontal lobe areas are modulated by BG?

Answer 4

• limbic
• oculomotor
• motor
• prefrontal

Question 5

How (what 3 ways) do BG loops facilitate motor cortical areas?

Answer 5

1. initiating movement
2. sequencing movement
3. automaticity

Lesions produce increased or decreased movement