In the stretch reflex, a signal from a sensory neuron that detects stretch in a muscle reaches a motor neuron innervating the stretched muscle via

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The stretch reflex is a monosynaptic reflex, meaning that the sensory neuron that detects stretch in a muscle synapses directly with the motor neuron that innervates the stretched muscle. However, there are also excitatory interneurons in the spinal cord that can amplify the signal from the sensory neuron.

In the Stretch Reflex, a Signal from a Sensory Neuron