Plantar reflex
The plantar reflex is used to diagnose an upper motor neurone lesion above the S1 segment.
Warn the patient what is to occur. Using a blunt object, such as motor car key, stroke up the lateral aspect of the sole, curving inwards before you reach the middle metatarsophalangeal joint.
Interpretation of results:
- normal response - flexion of the big toe at the MTP joint in patients over one year of age
- Babinski response - extension of the toe at the MTP joint - this indicates an upper motor neurone lesion
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