What number is the normal, expected deep tendon reflex?

What number is the normal, expected deep tendon reflex?

• A. 2+
• B. 0
• C. 1+
• D. 4+

Answer: (A)

Normal deep tendon reflexes are graded as 2+ on a 0–4 scale. This 2+ rating means the reflex is present with a normal, expected strength. The scale goes: 0 absent, 1+ diminished, 2+ normal, 3+ brisk, 4+ hyperactive with clonus. This grading reflects the integrity of the reflex arc—sensory input travels to the spinal cord and motor output returns to the muscle, with typical inhibition from higher brain centers. In practice, bilateral symmetry matters; differences can indicate issues, while marked increases (3+ or 4+) suggest possible upper motor neuron involvement and decreases or absent reflexes suggest nerve or lower motor neuron problems.

Normal deep tendon reflexes are graded as 2+ on a 0–4 scale. This 2+ rating means the reflex is present with a normal, expected strength. The scale goes: 0 absent, 1+ diminished, 2+ normal, 3+ brisk, 4+ hyperactive with clonus. This grading reflects the integrity of the reflex arc—sensory input travels to the spinal cord and motor output returns to the muscle, with typical inhibition from higher brain centers. In practice, bilateral symmetry matters; differences can indicate issues, while marked increases (3+ or 4+) suggest possible upper motor neuron involvement and decreases or absent reflexes suggest nerve or lower motor neuron problems.