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
a detla =
fast pain
pain / inflammation receptor in free nerve endings
c neuron =
slow pain
pain/inflammation receptor of free nerve endings
specialized capusle receptors have what neuron?
II
II neuron is in charge of what?
specialized capsule receptors
specialized capsule receptors tell you what?
position and movement
specialized capsule receptors have what two special thigns?
paciniform corpuscles
ruffini endings
touch and vibration is felt by what?
a -beta
free nerve endings no specialized are felt by what?
a -delta / c
pain and temperature are felt by
a -delta/c
tendon tension is felt by
Ib neuron
length and rate of change in the muscle is felt by
Ia neuron
joint capsule position is felt by
a -delta and c
ligament stress is felt by
a-delta and c
free nerve endings for pain and inflammation are felt by
a delta and c
large diameters of myelinated things are felt by what and are in charge of what?
muscles tendons and joints
Ia
Ib
medium diameters (myelinated) are felt by what and are in charge of what?
muscle spindles - II
specialized cutaneous receptors - a beta
small diameters are felt by what and are in charge of what?
myelinated free nerve endings = a delta
unmyelinated free never endings = c
