1. In terms of basal ganglia damage, which of these causes Huntingtons?
- Unilateral damage to subthalamic nuclei. Unwanted movements
- Degeneration of striatum. No inhibition of thalamus, resulting in overexcitability and unwanted movements
- Lack of dopamine increases activity of direct pathway. Tonic inhibition of thalamus and less excitation of cortex. Difficulties starting and stopping movements
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2. Which deep structure is responsible for reading out?
- Basal ganglia
- Superior Colliculus
3. In the indirect pathway of timing and movements, what is inhibited less causing more stimulation of the substantia-nigra/globus pallidus resulting in no movement?
- Corticospinal tract
- Subthalamic nuclei
- Substantia-nigra/globus pallidus
4. The cortex and caudate and putamen share?
- Excitatory connections
- Inhibitory connections
- Both excitatory and inhibitory connections
5. Which of these is the circuit for receiving input?
- Frontal motor areas --> pons --> cerebellar cortex
- Cerebellar cortex --> deep cereb nuclei --> superior cereb penduct --> ventrolateral PMC