Biceps (C5, C6)

1. The patient's arm should be partially flexed at the elbow with the palm down.
2. Place your thumb or finger firmly on the biceps tendon.
3. Strike your finger with the hammer.
4. You should feel the response even if you can't see it.

Triceps (C6, C7)

1. Support the upper arm and let the patient's forearm hang free.
2. Strike the triceps tendon above the elbow with the broad side of the hammer.
3. If the patient is sitting or lying down, flex the patient's arm at the elbow and hold it close to the chest.

Brachioradialis (C5, C6)

1. Have the patient rest the forearm on the abdomen or lap.
2. Strike the radius about 1-2 inches above the wrist.
3. Watch for flexion and supination of the forearm.

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