Video images (magnification, × 30) of the ring fingers of an electric guitar player who uses for picking the plectrum technique as shown in Fig. 1B. Images have been performed on the skin of the centre of the fingertips [A = left ring finger (picking hand); B = right ring finger (fretboard hand). Image of the ring finger of the fretboard hand (B) clearly demonstrates a clumsy and faded fingerprint structure as compared to the left ringer that is not used for playing.
Gambichler et al. BMC Dermatology 2004 4:3 doi:10.1186/1471-5945-4-3