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Supinator Reflex
Aka: Supinator Reflex, Supinator Sign, Inverted Brachioradialis Reflex
- Technique
- Perform Brachioradialis Reflex
- Strike reflex hammer at distal radius overlying radial styloid process region
- Observe for flexion at elbow (normal) and fingers (abnormal)
- Findings
- Normal
- Normal Brachioradialis Reflex results in brachioradialis contraction and elbow flexion
- Abnormal
- No brachioradialis contraction or elbow flexion
- Wrist and finger flexion only
- Causes
- Typically due to C5-C6 spinal cord lesion
- Associated with an absent Biceps Reflex and hyperreflexia at the triceps
- References
- Kane (2020) Am Fam Physician 102(12): 740-50 [PubMed]