Fig. 5
From: Label-free nanoscale optical metrology on myelinated axons in vivo
Nanoscale sensing of myelin swelling under osmotic challenge. a SpeRe on the myelinated axon in the freshly sliced brain cortex under osmotic challenge. The osmotic pressure changed from 240 to 360 mOsm L−1. b Representative reflectance spectra from the demarcated regions in a. Arrows in corresponding colors indicate the peaks. c Quantification of spectral shift in response to changes in osmotic pressure (n = 4 axons)
