Sammanfattning

Visual attention appears to modulate cortical neurodynamics and synchronization through various cholinergic mechanisms. In order to study these mechanisms, we have developed a neural network model of visual cortex area V4, based on psychophysical, anatomical and physiological data. With this model, we want to link selective visual information processing to neural circuits within V4, bottom-up sensory input pathways, top-down attention input pathways, and to cholinergic modulation from the prefrontal lobe. We investigate cellular and network mechanisms underlying some recent analytical results from visual attention experimental data. Our model can reproduce the experimental findings that attention to a stimulus causes increased gamma-frequency synchronization in the superficial layers. Computer simulations and STA power analysis also demonstrate different effects of the different cholinergic attention modulation action mechanisms

Nyckelord

Attention; Neural network model; Hodgkin–Huxley neurons; Visual cortex; V4; Neuromodulation

Publicerad i

Cognitive Neurodynamics
2007, Volym: 1, nummer: 4, sidor: 275-285

SLU författare

• Liljenström, Hans

  • Institutionen för energi och teknik, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Veterinärmedicin
Husdjursvetenskap


Publikationens identifierare

DOI: https://doi.org/10.1007/s11571-007-9028-7

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/16397