Proprioception And Reflexes

Question 1

Golgi tendon organ

Answer 1

Senses tension. Sensory input, inhibitory interneuron, IPSP for Aa motor neuron, decreased contraction

Question 2

Muscle Spindle

Answer 2

Sense length, spindle length is proportional to information sent to spinal cord. Coactovation: Aa stimulation=contracting extrafusal fibers=shortening of spindle, AV contraction of intrafusal fibers=maintaining proprioception. Increases muscle contraction to prevent overstretching

Question 3

Deep tendon reflex

Answer 3

Tendon stretch=muscle spindle activation=integration, simultaneous GTO relaxation and muscle spindle reflex contraction=antagonistic inhibition

Question 4

Tetanus

Answer 4

Clostridium tetani uptake by somatic motor neurons. Blocks neurotransmitter release at inhibitory synapses in spinal cord (spasms and paralysis). Treat with antitoxin, antibiotic, and nmAChR antagonist