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dorsiflexion of the great toe when the skin over the Achilles tendon is pinched; seen with corticospinal tract injuries; a variation on Babinski sign.
Schäf·fer re·flex(shāf'ĕr rē'fleks)
In cases of injury to the corticospinal tract, the great toe is dorsiflexed when the skin over the Achilles tendon is pinched.
[Max Schäffer, Ger. neurologist, 1852–1923]
Dorsiflexion of the toes and flexion of the foot resulting when the middle portion of the Achilles tendon is pinched.