Save
Busy. Please wait.
Log in with Clever
or

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever
or

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

SpinalReflexes

QuestionAnswer
What information does the muscle spindle device send back to the spinal cord? info about muscle stretch
What type of nerve fibers relay muscle spindle information? Type Ia and II, myelinated fast-conducting
What information does the Golgi tendon organ (GTO) send back to the spinal cord? info about muscle force
What type of nerve fibers relay GTO information? Ib large myelinated fibers
List the efferents for the muscle spindle device and GTO. spindle - gamma motoneurons GTO - none
Explain the afferent activity of muscle spindles during 1) passive stretch, 2)experimental (artificially induced)contraction and 3) volitional contraction. 1) passive - increased firing rate 2) exp. contraction - decreased firing rate 3) voluntary contraction - increased firing rate via coactivation of gamma motoneurons
Define the term gain. the sensitivity of sensory feedback
To avoid loss of gain from muscle spindles during volitional contraction, what phenomenon takes place? alpha-gamma co-activation
What is the myotactic reflex? DTR
Explain the tri-neuronal, disynaptic reflex that occurs when the patellar tendon is struck by a reflex hammer. reflex hammer activates Ia and II muscle spindle afferents, synapse on motoneurons of agonists/synergists directly AND on Ia inhibitory interneurons that stop antagonist muscles from firing
What does the H-reflex quantitatively measure? amplitude and latency of myotactic reflex
Explain the series of events that occur during supra-maximal force exertion of the biceps muscles, for example. GTO sends Ib afferents to spinal cord, inhibitory Ib interneurons are activated, agonists are inhibited and antagonists are activated. supraspinal input is also a factor
What is the function of Renshaw cells? After a delay, they synapse on antagonist muscles to activate them and inhibit agonist motoneuron pools - negative feedback control
What is the name of the negative feedback control that is possible due to collateral branches from motoneurons that turn back to synapse on Renshaw cells in the ventral horn? recurrent inhibition
Describe the cutaneous reflex that should be carried out if a person steps on a nail. cutaneous receptors send afferents to spinal cord through several interneurons to activate flexors/inhibit extensors on the same leg and inhibit flexors and activate extensors on the opposite leg
What is the NT used by inhibitory interneurons? glycine
What structure is made of intra-spinal connections to allow for things like arm swing and stepping? fasciculus proprius
What types of substances/signals can influence interneuronal populations responsible for locomotion? several classes of drugs and NTs, supraspinal control
Which neurons are necessary to initiate stepping forward to walk? rhythm generator neurons
What is the purpose of the commissural interneurons? work to keep both sides in phase when walking
Which neurons modulate or change the pattern of locomotion most exclusively? patterning network interneurons
How were the central pattern generator neurons (CPG) affected in the experiments with cats who had high spinal cord injuries? Minimally, they were still able to interpret sensory data and generate a rhythmical stepping motion
Created by: sirprakes
Popular Neuroscience sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards