Figure 1.
Auditory and visual zones in the claustrum.
A
, Illustration of the vertical approach to the claustrum used in one animal, depicted on an anatomical MR image.
B
, Timeline of the audio-visual stimulation paradigm.
C
, Nissl-stained section used to confirm the approach to the claustrum using visible electrode tracks. Approximate locations of the auditory and visual zones are indicated.
D
, Example data recorded on three penetrations demonstrating the subsequent occurrence of auditory and visually driven units at different depths from the cortical surface. Lines denote the trial-averaged firing rate to visual (video), auditory (sound) and combined audio-visual (sound&video) stimuli (smoothed using a 10 ms Gaussian window); baseline firing rates were subtracted. Stimuli commenced at t = 0. cla, claustrum; ins, insular cortex; ac, auditory cortex; ls, lateral sulcus.