Which nerve root is indicated by a reduced reflex at L5 in a radiculopathy scenario?

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Multiple Choice

Which nerve root is indicated by a reduced reflex at L5 in a radiculopathy scenario?

In radiculopathy, signs line up with the spinal nerve root involved, including reflex changes. The knee-jerk mainly reflects the L4 segment, and the ankle-jerk reflects S1. When the L5 root is affected, the most relevant reflex change you’d correlate with that level is a reduced reflex tied to the L5 distribution. This fits with L5’s role in dorsiflexion of the big toe and sensation on the dorsum of the foot, which are classic L5 findings. The other roots would produce reflex changes at different sites: L4 with the knee reflex and S1 with the ankle reflex.

In radiculopathy, signs line up with the spinal nerve root involved, including reflex changes. The knee-jerk mainly reflects the L4 segment, and the ankle-jerk reflects S1. When the L5 root is affected, the most relevant reflex change you’d correlate with that level is a reduced reflex tied to the L5 distribution. This fits with L5’s role in dorsiflexion of the big toe and sensation on the dorsum of the foot, which are classic L5 findings. The other roots would produce reflex changes at different sites: L4 with the knee reflex and S1 with the ankle reflex.

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