As one measures the orientation preference of V1 neurons at different depths from the surface of the cortex, one finds that:
a) Neurons closer to the surface prefer vertical orientations, while deeper neurons prefer horizontal orientations.
b) Neurons closer to the surface prefer horizontal orientations, while deeper neurons prefer vertical orientations.
c) There is no correlation between neuron depth and orientation preference.
d) Neurons at all depths exhibit random orientation preferences.
