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The amygdala is thought to process fear-related stimuli rapidly and nonconsciously. We found that an individual with complete bilateral amygdala lesions, who cannot recognize fear from faces, nonetheless showed normal rapid detection and nonconscious processing of those same fearful faces. We conclude that the amygdala is not essential for early stages of(More)
I investigated the neural algorithms by which neurons gain selectivity for interaural level difference in the brainstem of the barn owl (Tyto alba). Differences in the timing and in the level of sounds at the ears are used by this owl to encode, respectively, azimuthal and vertical position of sound sources in space. These two cues are processed in two(More)
The aim of this study was to examine how the functional specialization of the barn owl's auditory brainstem might correlate with histochemical compartmentalization. The barn owl uses interaural intensity and time differences to encode, respectively, the vertical and azimuthal positions of sound sources in space. These two auditory cues are processed in(More)
The amygdala is important in emotion, but it remains unknown whether it is specialized for certain stimulus categories. We analyzed responses recorded from 489 single neurons in the amygdalae of 41 neurosurgical patients and found a categorical selectivity for pictures of animals in the right amygdala. This selectivity appeared to be independent of(More)
  • Gestur Björn Christianson, Brian Arthur, Sharad Fischer, Teresa Shanbhag, Nick, Ralph Adolphs +9 others
  • 2005
All Rights Reserved iii To my parents and grandparents. iv Acknowledgements Thanks are due first and foremost to my advisor, Masakazu Konishi, without whom this work would never have been done. Also I must thank my collaborator, José Luis Peña, who recorded all of the NL data shown in this work. All members of the Konishi lab with whom I have had the(More)
The amygdala is important for face processing, and direction of eye gaze is one of the most socially salient facial signals. Recording from over 200 neurons in the amygdala of neurosurgical patients, we found robust encoding of the identity of neutral-expression faces, but not of their direction of gaze. Processing of gaze direction may rely on a(More)
Supplementary Methods Electrophysiological Recordings All studies conformed to the guidelines of the Medical Institutional Review Board at UCLA. Electrode locations were based exclusively on clinical criteria and were verified by MRI or by computer tomography co-registered to preoperative MRI. Based on MRI analysis and stereotaxic electrode placement, we(More)
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