Whole-cell voltage recordings were obtained from 64 synaptically coupled excitatory layer 4 spiny neurones and L2/3 pyramidal cells in acute slices of the somatosensory cortex ('barrel' cortex) of 17- to 23-days-old rats.
The 'projection' field of the axons of L4 spiny neurons in layers 2/3, 4 and 5 has a width of 400-500 microm thereby defining an anatomical barrel-column.
Whole-cell voltage recordings were obtained from 64 synaptically coupled excitatory layer 4 spiny neurones and L2/3 pyramidal cells in acute slices of the somatosensory cortex ('barrel' cortex) of 17- to 23-days-old rats.