Fig. 1: Experimental setup.
From: Spectral cues are necessary to encode azimuthal auditory space in the mouse superior colliculus
a An illustration of the virtual auditory space (VAS) stimulus and electrophysiology recording setup. During the recording, the head-fixed mouse can run freely on a cylindrical treadmill, while motion is recorded by a rotary encoder. Auditory stimuli are delivered through a pair of earphones near the mouse’s ears. The entire setup is enclosed in an anechoic chamber. b A schematic of a 256-electrode silicon probe in the superior colliculus (SC; sagittal plane). The background image is from Allen Mouse Brain Reference Atlas54. sSC: superficial SC; dSC: deep SC; A: anterior; D: dorsal. The scale bar is 500 µm. c A photograph of a sagittal section of the SC and the fluorescent tracing of DiI (red channel) that was coated on the back of the probe shanks. The dotted cyan lines indicate the active areas of the probe during the recording, reconstructed from the DiI traces (the location of the rightmost shank was inferred by a DiI trace in the adjacent slice). The four shanks with a 400-µm pitch nicely match the anteroposterior extent of the SC. The scale bar is 500 µm.
