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BIOD322 / BIOD 322 Module 5 (Latest Update 2025 / 2026) Neuroscience | Questions & Answers | Grade A | 100% Correct - Portage Learning
Movement
Question:
Two components of dorsal striatum and what they are responsible for
Answer:
- Caudate nucleus - goal directed actions
- Putamen - motor associated procedural learning tasks
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Question:
GABAergic spiny projection neurons (SPNs) populations: Which one
expresses dopamine D1 receptors and increases motor activity when direct pathway is activated?
Which expresses dopamine D2 receptors and decreases motor activity when the indirect pathway is activated?
Answer:
Dopamine D1 and increase motor activity - Direct SPNs
Dopamine D2 and decrease motor activity - indirect SPNs
Question:
What two things are included / located in the ventral striatum
Answer:
- Olfactory tubercle
- Nucleus accumbens
Question:
In the ventral striatum, where do dopaminergic inputs come from?
Answer:
Ventral tegmental area 2 / 3
Question:
Input from the striatum comes from two different locations and via what?
Answer:
- cortex (via glutamate)
- substantia nigra (dopamine)
Question:
Muscle fibers are innervated by what type of neurons?
Answer:
Alpha motor neurons (lower motor neurons)
Question:
In the ventral horn, alpha motor neurons found more medially are responsible for innervating what type of muscles? Found more laterally?
Answer:
Medial - Proximal muscles Lateral - Distal muscles
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