Diseases of the nervous system : a text-book of neurology and psychiatry . Fig. 17.—Extension of the great toe on irritating the sole. The Babinski plantarextension phenomenon. the finger nail, or a blunt-pointed instrument. As there is great varia-tion in the thickness of the skin of the soles of the feet, the various waysof bringing out a Babinski phenomenon should be tried in each attention should be directed to the dangers of confusing. Fig. is.—The Chaddock modification of the Babinski, causing great toe extensionon stroking beneath the external malleolus. (Chaddock.) the
Diseases of the nervous system : a text-book of neurology and psychiatry . Fig. 17.—Extension of the great toe on irritating the sole. The Babinski plantarextension phenomenon. the finger nail, or a blunt-pointed instrument. As there is great varia-tion in the thickness of the skin of the soles of the feet, the various waysof bringing out a Babinski phenomenon should be tried in each attention should be directed to the dangers of confusing. Fig. is.—The Chaddock modification of the Babinski, causing great toe extensionon stroking beneath the external malleolus. (Chaddock.) the protective, pulling away motion on tickling, which causes a marked, quick dorsal raising of the great toe, from a true Babinski phenomenon. Careful record should be made of the irregularities in plantar response. In some patients there will be plantar flexion of the small 54 METHODS OF NEUROLOGICAL EXAMINATION toes but no reaction of the big toe. At times this may be as significantas a true dorsal extension. It is to be borne in mind that dorsal rais-ing of the great toe is normal in infants and children up to the ageof successful walking. A number of closely related reflexes have been described, havingmuch the same significance as the Babinski sign, but being less constant,and at times contradictory. These are: Striimpell Reflex.—^This follows forceful pressure over the anteriortibial region with a resultant dorsal extension of the great toe.
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