Arc Centre of Excellence for Integrative Brain Function

Mechanisms of Feature Selectivity and Invariance in Primary Visual Cortex.

Ali Almasi, Hamish Meffin, Shaun L Cloherty, Yan Wong, Molis Yunzab, Michael R Ibbotson

2020-09-01

Visual object identification requires both selectivity for specific visual features that are important to the object's identity an..

GABA-mediated tonic inhibition differentially modulates gain in functional subtypes of cortical interneurons

A Bryson, RJ Hatch, BJ Zandt, C Rossert, SF Berkovic, CA Reid, DB Grayden, SL Hill, S Petrou

2020-02-11

The binding of GABA (γ-aminobutyric acid) to extrasynaptic GABA<inf>A</inf> receptors generates tonic inhibition that acts as a po..

Global activity shaping strategies for a retinal implant

Martin J Spencer, Tatiana Kameneva, David B Grayden, Hamish Meffin, Anthony N Burkitt

2019-09-18

Objective. Retinal prostheses provide visual perception via electrical stimulation of the retina using an implanted array of elect..

Facile fabrication of an electrolyte-gated In2O3 nanoparticle-based thin-film transistor uniting laser ablation and inkjet printing

B Hassan, Y Liang, J Yong, Y Yu, K Ganesan, A Walla, R Evans, G Chana, B Nasr, E Skafidas

2018-12-01

We propose the inkjet printing of new thin-film transistors (TFTs) based upon a sodium alginate (NaAlg) electrolyte-gate and a new..

A possible role for end-stopped V1 neurons in the perception of motion: A computational model

PZ Eskikand, T Kameneva, MR Ibbotson, AN Burkitt, DB Grayden

2016-10-01

We present a model of the early stages of processing in the visual cortex, in particular V1 and MT, to investigate the potential r..

Frequency responses of rat retinal ganglion cells

AE Hadjinicolaou, SL Cloherty, YS Hung, T Kameneva, MR Ibbotson

2016-06-01

There are 15-20 different types of retinal ganglion cells (RGC) in the mammalian retina, each encoding different aspects of the vi..

A Simple and Accurate Model to Predict Responses to Multi-electrode Stimulation in the Retina

MI Maturana, NV Apollo, AE Hadjinicolaou, DJ Garrett, SL Cloherty, T Kameneva, DB Grayden, MR Ibbotson, H Meffin

2016-04-01

Implantable electrode arrays are widely used in therapeutic stimulation of the nervous system (e.g. cochlear, retinal, and cortica..

Retinal ganglion cells: Mechanisms underlying depolarization block and differential responses to high frequency electrical stimulation of on and off cells

T Kameneva, MI Maturana, AE Hadjinicolaou, SL Cloherty, MR Ibbotson, DB Grayden, AN Burkitt, H Meffin

2016-01-06

Objective. ON and OFF retinal ganglion cells (RGCs) are known to have non-monotonic responses to increasing amplitudes of high fre..

Prosthetic vision: Devices, patient outcomes and retinal research

AE Hadjinicolaou, H Meffin, MI Maturana, SL Cloherty, MR Ibbotson

2015-09-01

Retinal disease and its associated retinal degeneration can lead to the loss of photoreceptors and therefore, profound blindness. ..

Contrast-dependent phase sensitivity in v1 but not v2 of macaque visual cortex

SL Cloherty, MR Ibbotson

2015-01-01

Some neurons in early visual cortex are highly selective for the position of oriented edges in their receptive fields (simple cell..

The effects of temperature changes on retinal ganglion cell responses to electrical stimulation

MI Maturana, NV Apollo, DJ Garrett, T Kameneva, H Meffin, MR Ibbotson, SL Cloherty, D GRAYDEN

2015-01-01

Little is known about how the retina's response to electrical stimulation is modified by temperatures. In vitro experiments are of..

Mapping somatosensory connectivity in adult mice using diffusion MRI tractography and super-resolution track density imaging

K Richards, F Calamante, JD Tournier, ND Kurniawan, F Sadeghian, AR Retchford, GD Jones, CA Reid, DC Reutens, R Ordidge, A Connelly, S Petrou

2014-11-15

In this study we combined ultra-high field diffusion MRI fiber tracking and super-resolution track density imaging (TDI) to map th..