100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
NSCI 421 Test 2 Questions & Answers 2024/2025 $8.99   Add to cart

Exam (elaborations)

NSCI 421 Test 2 Questions & Answers 2024/2025

 8 views  0 purchase
  • Course
  • NSCI 421
  • Institution
  • NSCI 421

NSCI 421 Test 2 Questions & Answers 2024/2025 how is movement controlled - ANSWERS-motor neurons -central pattern generators -sensory feedback -mesencephalic locomotor region brainstem nuclei - ANSWERS-contains the mesencephalic locomotor region (MLR) local circuit neurons - ANSWERSc...

[Show more]

Preview 2 out of 13  pages

  • November 2, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NSCI 421
  • NSCI 421
avatar-seller
Bensuda
NSCI 421 Test 2 Questions & Answers
2024/2025

how is movement controlled - ANSWERS-motor neurons

-central pattern generators

-sensory feedback

-mesencephalic locomotor region



brainstem nuclei - ANSWERS-contains the mesencephalic locomotor region (MLR)



local circuit neurons - ANSWERScontains the spinal cord interneurons and CPGs



motor neurons - ANSWERSthey are the final common pathway for movement



What does the BG and cerebellum not do? - ANSWERSthey do not contact lower motor neurons and
they do not send projections to the spinal cord



How do the BG and cerebellum influence movement? - ANSWERS-via the continuous loops through the
thalamus

-direct projections to the motor control nuclei in the MLR



alpha motor neuron - ANSWERSinnervates skeletal muscle fibers (large)



gamma motor neuron - ANSWERSinnervates muscle spindles (smaller)



medial motor neurons - ANSWERSinnervate trunk muscles



lateral motor neurons - ANSWERSregulate the limb muscles

, motor pool - ANSWERSall motor neurons innervating a single muscle



motor unit - ANSWERSa single motor neuron and all the muscle fibers it innervates

**each muscle fiber within this has the same physiological and metabolic properties**



small motor neurons - ANSWERScontract slowly, small amount of force and force is maintained



large motor neurons - ANSWERSfibers contract rapidly with large amount of force and force is
maintained only briefly



alpha motor neuron inputs - ANSWERS-local circuit interneurons in the spinal cord

-monosynaptic and polysynaptic input from sensory afferents

-monosynaptic and polysynaptic input from upper motor neurons

**are the final common pathway for movement**



ipsilateral - ANSWERSspinal interneurons can project axons to the same side of the spinal neurons



contralateral - ANSWERSspinal interneurons can project axons to the opposite side of the spinal cord



intrafusal fibers - ANSWERSare arranged in parallel with extrafusal fibers



spindle afferents - ANSWERSa group of 1a sensory axons, are arranged around the central part of the
spindle



gamma motor neurons (muscle) - ANSWERSinnervate intrafusal fibers and control sensitivity of the
spindle



muscle spindle schematic - ANSWERS

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller Bensuda. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $8.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

62890 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$8.99
  • (0)
  Add to cart