Ziad Hafed

Active Perception

[Ziad Hafed @HafedLab]

New paper by the lab: superior colliculus eye movement commands simultaneously sense the visual appearance of the environment.

https://t.co/JnEPaL7aOg
https://t.co/BIS5F5C7Na

[Ziad Hafed @HafedLab]

Further evidence of much higher covariation with saccadic reaction time of superior colliculus than primary visual cortex visual responses:
https://t.co/IGNJXvteOj

[Ziad Hafed @HafedLab]

New paper about a topic close to our hearts: the temporal structure of saccadic eye movements. Work led by Tim Näher, Pascal Fries, and colleagues:
https://t.co/Zubdk3MwzA

[Ziad Hafed @HafedLab]

New paper from the lab describing transient burst signals in the foveal region of the superior colliculus, which we think aid in the transition between gaze fixation and saccade generation:

https://t.co/tl4NxidhCT

[Ziad Hafed @HafedLab]

New paper by the lab:

https://t.co/ojBgiRmrCk

[Ziad Hafed @HafedLab]

New results showing that an inevitable, unadaptable, and extremely short-latency behavioral reflex is an exclusively cortical phenomenon.

https://t.co/VJi0w4Iqkx

[Ziad Hafed @HafedLab]

New paper by the lab:
https://t.co/2uwgvAwJOw

[Ziad Hafed @HafedLab]

New results aiding our continued investigations of the multiple sensory pathways influencing the oculomotor system...
https://t.co/vw0BZ7p12l

[Ziad Hafed @HafedLab]

New article with our Tübingen neuroscience colleagues, identifying common principles across vastly different species and sensory-motor modalities.

https://t.co/csLCr9tLVW

[Ziad Hafed @HafedLab]

The superior colliculus exhibits qualitatively similar visual responses to those in the primary visual cortex. We show that this similarity masks a large fundamental difference between the two areas when it comes to active vision:
https://t.co/WOH51DqBSq

[Ziad Hafed @HafedLab]

New paper about foveal visual representations in the superior colliculus, and how they may help integrate visual scene information across rapid eye movements.

https://t.co/yXIBS8zzIa

[Ziad Hafed @HafedLab]

Saccadic suppression was demonstrated in many species. In a new paper, using modeling and matched experimental paradigms in fish and primates, we explored the reasons for why saccadic suppression strength might be different in different organisms.
https://t.co/i9F1etXElk

[Ziad Hafed @HafedLab]

New paper establishing a novel paradigm for exploring the neurophysiological mechanisms underlying a well-known active vision phenomenon.
https://t.co/NwQjvKMf3V

[Ziad Hafed @HafedLab]

New paper: "prediction error" signaling by foveal superior colliculus neurons across eye movements. Could be one building block for maintaining perceptual stability despite disruptions of retinal image streams caused by eye movements.
https://t.co/nC8a9qDRFi

[Ziad Hafed @HafedLab]

New paper demonstrating saccadic suppression in zebrafish, as well as an intriguing selectivity for specific stimuli. In upcoming work, we'll also quantitatively compare the zebrafish suppression strength to that in primates.
https://t.co/rpzUl4Jyc4

[Ziad Hafed @HafedLab]

New paper just out. We analyzed superior colliculus field potentials, and linked two surprising phenomena that we had previously described individually, and independently of each other.
https://t.co/AES0k2GNUD

[Ziad Hafed @HafedLab]

New paper linking our interests in active vision, microsaccades, visual attention, sensory/motor brain structures, as well as visual processing asymmetries in the brain.

https://t.co/ydcy3EjjNQ

[Ziad Hafed @HafedLab]

We said it in 2002, 2011, 2013, and then again during 2015-2018...now, we say it with compelling causal evidence: foveal action for the control of extrafoveal vision.
https://t.co/g4Jsm9W4ah

[Ziad Hafed @HafedLab]

New results. We ported the 2-d perisaccadic perceptual mislocalization paradigm for use in neurophysiology experiments.

https://t.co/6FLLYjewux

[Ziad Hafed @HafedLab]

New paper on perisaccadic visual mislocalization.

https://t.co/o41QJppYxl

[Ziad Hafed @HafedLab]

New results. We knew that superior colliculus has higher visual sensitivity in the upper visual field (UVF), and visual feature tuning in motor bursts. Now we know that the UVF sensory preference locally persists peri-saccadically.

https://t.co/PgdMRRbKIC