2016.05.12 CSCS Daily Study Question:
Sujat picks up a 75 kilogram dumbbell from the floor. A golgi tendon organ within the lifting arm is activated, sending a sensory signal to the spinal cord. The sensory signal synapses with what type of interneuron within the spinal cord?
(A) Activation
(B) Inhibition
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Correct Answer:
(B) Inhibition
Explanation:
Golgi Tendon Organs (GTOs) proprioceptors that are activated to protect the body from excessive force generation. When Sujat lifts the dumbbell, the GTO is activated as a defense mechanism. The signal that the GTO sends to the spinal cord synapses with an inhibitory interneuron, which inhibits further muscle activation.
Reference:
Essentials of Strength Training & Conditioning 3rd edition p. 13
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2016.05.12 CSCS Daily Study Question