18 JUNE 2019 Flashcards
what shape are muscle spindles?
fusiform
what does fusiform mean ?
spindle shaped soooo bulgy in the middle and tappered at the end
name for inside the spindle
intrafusal
name for outside the spindle
extrafusal
primary (sensory) endings
tell me 3 things
- AP on 1a neurons
tells us - length
- rate of change
the nuclear bag tell you
the length and the rate of change
which on is bigger nuclear bag or chain?
the nuclear bag
what does the nuclear chain tell you?
the rate of the change
secondary sensory endings are what?
smaller and thinner
what does the contraction of a muscle take place?
on the outside so its extrafusal
a - alpha neurons do what?
contract extrafusal muscles
shorten overall muscles
if the muscle is lengthen what happens to APs
increases
if the muscle is shorten what happens to APs
decreases
when your at rest what happens to APs
they are still constantly sending messages to the brain
def of APs at rest
baseline APs
what do a-gamma neurons do?
contrast intrafusal muscles
keep spindle sensitive to stretch through out movement
a alpha is where?
on the outside
a gammas are where?
on the inside
a alpha is in control of
active voluntary muscle contraction
golgi tendon organs are what
there to sense ‘tension” in a muscle tendon
- active contraction and passive stretch
transmit on Ib sensory neurons
what neurons is in charge of the golgi tendon organ?
Ib
Ib is incharge of what?
golgi tendon organs = tension in the tendon
and
ligament receptors = tension on a ligament
a delta and c neurons are in charge of what?
free nerve endings
so pain and inflammation
difference between a delta and c
a delta = fast pain
c = slow pain
