Figure 6
From: Bone conducted responses in the neonatal rat auditory cortex
Three epochs of functional maturation in the rat auditory system. Developmental timeline from P0 (day of birth) to P16 is shown in the middle. The major physiological (above) and morphological (below) changes observed in the rat auditory system during this period are indicated by black horizontal lines and circles (onset—open circle, end—filled circle). Three epochs of functional maturation are represented by colored bars. Morphological changes were obtained in: connectivity10,39, inner ear40,41, and middle and outer ear19,22,42,43. Physiological changes were obtained in: spontaneous activity changes15, and evoked activity changes19,23. Grey bars represent variability of values in reports. The functional changes investigated in this study are written in bold. The asterisk indicates the earliest examined age. BC Bone-conducted, ASW Auditory shock wave, CM Cochlear microphonic, AC Air-conducted, IC Inferior colliculus, ACx Auditory cortex, SGNs Spiral ganglion neurons, ISCs Inner supporting cells.
