Topic 3&4 Questions.doc

2 Pages
85 Views

Department
Kinesiology & Health Science
Course Code
KINE 3020
Professor
Merv Mosher

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Description
Topics 3&4 3 main components of a muscle spindle: – intrafusal fibres (specialized small muscle fibres) – sensory neuron endings; groups Ia and II (wrap around the central regions of the intrafusal muscle fibres) – gamma motor neuron endings (activate the polar contractile regions of the intrafusal fibres 2 subtypes of intrafusal muscle fibres: – nuclear bag signals the static length of an entire muscle and dynamic changes in muscle length - have many spherical nuclei at their centre and can stretch quickly when lengthened due to their elasticity – nuclear chain only signals the static length of an entire muscle - have a single row of nuclei that stretch more slowly (are less elastic) Type Ia afferent neurons are best able to respond quickly to stretching and sense the rate of change. They can be found wrapped around the equatorial region (which is most elastic) of both bag and chain intrafusal muscle fibres Which intrafusal muscle fibres do Type II afferents mainly innervate and why are they less sensitive to dynamic change in muscle length when compared to type Ia afferents? What is the main difference between alpha and gamma motor neuron function? The activation of __________ enhances dynamic response of Ia affer
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit