NEET PG DENTAL EXAM

Detailed explanation-1: -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 sensory neuron synapses directly on a motor neuron in the spinal cord.

Detailed explanation-2: -The patellar reflex is a deep tendon reflex, mediated by the spinal nerves from the levels L2, L3, and L4 in the spinal cord, predominantly in the root L4.

Detailed explanation-3: -Brain is not involved in any reflex action (e.g., knee-jerk relfex) while the muscle spindle, inter neuron and motor neuron are the part of reflex arc.

Detailed explanation-4: -Somatic reflexes which do not involve an interneuron are known as a. Monosynaptic reflexes. These reflexes only contain the afferent neuron and the efferent neuron with no interneuron in between. There is only one synapse that is formed between the afferent and efferent neuron hence the name monosynaptic (one synapse).