Spinal Cord: Golgi Tendon Organ Reflex (GTO)

Question 1

Collagen fibers

Answer 1

Run length wise within the tendons

Question 2

Golgi tendon organ

Answer 2

Weaved around collagen fiber

Question 3

Type 1B fibers

Answer 3

They are sensory fibers that take info from organ to CNS = afterent

Question 4

Golgi Tendon Organ

Answer 4

Sense the degree of tension (Proprioception)

Question 5

Muscle contraction

Answer 5

Generates tension in tendon—> too much tension (tendon avulsion)—> Golgi tendon organ

Question 6

Golgi tension Organ when stimulated activates

Answer 6

Type 1B sensory fibers

Question 7

Mechanically gated ion channels

Answer 7

Detect mechanical stimulation ( tension developed within the tendon from muscle contraction)

Question 8

Mechanically gated ion channels

Answer 8

Open allowing Na to get in generated positive ions
Resting membrane potential makes channels more positive

Question 9

Voltage gated ion channels

Answer 9

When a specific threshold potential is reached it is opened. Na ions flush into axon and generates positive charge causing action potential sent to CNS

Question 10

Posterior grey horn

Answer 10

GTO—>T1B->DRG—> PGH—> bifurcates into two interneuron (One inhibitory and one stimulators)

Question 11

Inhibitory Interneuron

Answer 11

Sends info through alpha motor neuron to skeletal muscle to relax bicep muscle

Question 12

Stimulators interneuron

Answer 12

Stimulates triceps muscle —> contracts pull the tendon to the opposite direction (Reciprocal activation and Autogenic inhibition)

Question 13

Glycine

Answer 13

Generates IPSP makes the cell negative (inhibitory neurons)

Question 14

Glutamate

Answer 14

Exciters generates EPSP causing cations to flow into the cell depolarizing it