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Striking the patellar ligament with a reflex hammer just below the patella stretches the muscle spindle in the quadriceps muscle. This produces a signal which travels back to the spinal cord and synapses (without interneurons) at the level of L4 in the spinal cord, completely independent of higher centres.he 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.
Best Answer: Monosynaptic reflexes such as the patellar reflex do not involve the brain since no intermediate (relay) neurone is involved. Other polysynaptic reflexes do involve the brain since a relay neurone is involved in the reflex arc which connects with longitudinal neurones running to and from the brain.You cannot suppress a monosynaptic reflex but you can suppress a polysynaptic reflex due the involvement of the brain.Source(s):eport Abuse. No it is not! The reflex arc works from the sensory neuron to the spinal cord, then directly to a motor neuron to perform the 'reflex.' The brain has no idea until the message then travels from the reflex action through another sensory neuron back to the brain to inform it of what just happened.