monosynaptic reflex arc does not require an interneuron.
monosynaptic reflex arc does not require an interneuron.
what kind of reflex arc does not require an interneuron?
monosynaptic
the patellar reflex is a clinical and classic example of the monosynaptic reflex arc. there is no interneuron in the pathway leading to contraction of the quadriceps muscle. instead, the bipolar sensory neuron synapses directly on a motor neuron in the spinal cord. however, there "is" an inhibitory interneuron used to relax the antagonistic hamstring muscle (reciprocal innervation).









































this test of a basic automatic reflex may be influenced by the patient consciously inhibiting or exaggerating the response; the doctor may use the jendrassik maneuver as a distraction or diversion in order to ensure a more valid reflex test.
patellar reflex
reflex arc









































a reflex arc is a neural pathway that controls a reflex. in vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. this allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain. however, the brain will receive the sensory input while the reflex is being carried out and the analysis of the signal takes place after the reflex action.
reflex arc