User profiles for Ziad M. Hafed

Ziad Hafed

Werner Reichardt Centre for Integrative Neuroscience
Verified email at cin.uni-tuebingen.de
Cited by 4801

Neuronal control of fixation and fixational eye movements

RJ Krauzlis, L Goffart, ZM Hafed - … Transactions of the …, 2017 - royalsocietypublishing.org
Ocular fixation is a dynamic process that is actively controlled by many of the same brain
structures involved in the control of eye movements, including the superior colliculus, …

How is visual salience computed in the brain? Insights from behaviour, neurobiology and modelling

R Veale, ZM Hafed, M Yoshida - … Transactions of the …, 2017 - royalsocietypublishing.org
Inherent in visual scene analysis is a bottleneck associated with the need to sequentially
sample locations with foveating eye movements. The concept of a ‘saliency map’ …

Mechanisms for generating and compensating for the smallest possible saccades

ZM Hafed - European Journal of Neuroscience, 2011 - Wiley Online Library
Microsaccades are small eye movements that occur during gaze fixation. Although taking
place only when we attempt to stabilize gaze position, microsaccades can be understood by …

Face recognition using the discrete cosine transform

ZM Hafed, MD Levine - International journal of computer vision, 2001 - Springer
An accurate and robust face recognition system was developed and tested. This system
exploits the feature extraction capabilities of the discrete cosine transform (DCT) and invokes …

[HTML][HTML] Microsaccades as an overt measure of covert attention shifts

ZM Hafed, JJ Clark - Vision research, 2002 - Elsevier
Microsaccades, or tiny eye movements that take place during periods of fixation, have long
been thought to be random artifacts of the oculomotor system. Here we demonstrate a …

A neural mechanism for microsaccade generation in the primate superior colliculus

ZM Hafed, L Goffart, RJ Krauzlis - science, 2009 - science.org
During fixation, the eyes are not still but often exhibit microsaccadic movements. The function
of microsaccades is controversial, largely because the neural mechanisms responsible for …

Microsaccadic suppression of visual bursts in the primate superior colliculus

ZM Hafed, RJ Krauzlis - Journal of Neuroscience, 2010 - Soc Neuroscience
Saccadic suppression, a behavioral phenomenon in which perceptual thresholds are
elevated before, during, and after saccadic eye movements, is an important mechanism for …

[PDF][PDF] Alteration of visual perception prior to microsaccades

ZM Hafed - Neuron, 2013 - cell.com
… I am also grateful to M. Hafed and A. Nieder for reading an earlier version of the manuscript.
This work was funded by the Werner Reichardt Centre for Integrative Neuroscience, …

Similarity of superior colliculus involvement in microsaccade and saccade generation

ZM Hafed, RJ Krauzlis - Journal of neurophysiology, 2012 - journals.physiology.org
The characteristics of microsaccades, or small fixational saccades, and their influence on
visual function have been studied extensively. However, the detailed mechanisms for …

Modulation of microsaccades in monkey during a covert visual attention task

ZM Hafed, LP Lovejoy, RJ Krauzlis - Journal of Neuroscience, 2011 - Soc Neuroscience
The use of awake, fixating monkeys in neuroscience has allowed significant advances in
understanding numerous brain functions. However, fixation is an active process, with the …