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Ratio between the amplitude of sensory evoked potentials at the wrist in both hands of left-handed subjects.
  1. A C Martínez,
  2. M C Conde,
  3. F D Campo,
  4. P Mingo,
  5. M T Ferrer

    Abstract

    Maximum sensory conduction velocity, duration and amplitude of the sensory evoked potentials at the wrist on stimulating digits 1, 2, 3 and 5, were determined bilaterally in 21 left-handed subjects with an age range from 6 to 47 years. The amplitude of the sensory evoked potential at the wrist was larger in the right hand. This asymmetry is the reverse of the one previously observed in right-handed infants and adults. It could be physiological and suggests a difference in density of sensory innervation between the two hands. Asymmetry of sensory innervation can be helpful in the study of hand dominance.

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