Sigurd Enghoff: CNL Alumni

Sigurd Enghoff

My primary academic interest is the fundamental principles that underpin information processing in the cerebrum. I strive to develop an understanding of the information processing mechanisms that arise from neural circuitry and to explore functional divisions and interactions between cortical and subcortical networks.

I am a proponent of the Integrated Information Theory of consciousness developed by Giulio Tononi (2008) and particularly interested in how integrated information generated by biological neural circuits relates to the quality of percepts and the scope of qualia.

This page includes a performance optimised implementation of the infomax and extended-infomax algorithms of Bell and Sejnowski (1995) and Lee, Girolami and Sejnowski (1998). The software was developed in collaboration with Scott Makeig and forms part of my thesis work on Moving ICA and Time-Frequency Analysis in Event-Related EEG Studies of Selective Attention (1999).

ICA Software

The ICA software provided via the links below implements the infomax and extended-infomax algorithms of Bell and Sejnowski (1995) and Lee, Girolami and Sejnowski (1998). Further information about ICA and infomax is available from the ICA-CNL web pages.

The MEX version was written under MATLAB version 5.2. The stand-alone ICA program analyzes data stored as a machine-native float matrix, which is assmued multiplexed channelwise. Parameters must be defined in script file, see example in "ica.sc".

Makefiles and executables are available for DEC Alpha, SGI and Sun 4. All software contained on this site is covered by the GNU General Public License.

Publications