Lesion a portion of the map 3. Seven speaker sound localization test shows lesion in ability to perform test in the contrallateral field at the lesioned freq if the bursts were short. Lateralization was used by earlier workers and was spared whereas localization was not spared. Head turning and other behavioral strategies can be used to compensate. Physiological studies suggest that there is half the sound field located in each half of the auditory system.
Tonotopic organization is like a rock.
Likely due to anatomy. Isofrequency is quite variable. Highly predictable but suprisingly variable. Binaural bands in A1. Wide variability between and within animals.