Hamish Meffin

Neural activity shaping utilizing a partitioned target pattern

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

Journal article  |  2021  |  Journal of Neural Engineering

Electrical stimulation of neural tissue is used in both clinical and experimental devices to evoke a desired spatiotemporal patter..

Analysis of extracellular spike waveforms and associated receptive fields of neurons in cat primary visual cortex

Shi H Sun, Ali Almasi, Molis Yunzab, Syeda Zehra, Damien G Hicks, Tatiana Kameneva, Michael R Ibbotson, Hamish Meffin

Journal article  |  2021  |  The Journal of Physiology

KEY POINTS: Extracellular spikes recorded in the visual cortex (Area 17/18, V1) are commonly classified into either regular-spikin..

Learning receptive field properties of complex cells in V1

Yanbo Lian, Ali Almasi, David B Grayden, Tatiana Kameneva, Anthony N Burkitt, Hamish Meffin

Journal article  |  2021  |  PLOS Computational Biology

There are two distinct classes of cells in the primary visual cortex (V1): simple cells and complex cells. One defining feature of..

High Fidelity Bidirectional Neural Interfacing with Carbon Fiber Microelectrodes Coated with Boron-Doped Carbon Nanowalls: An Acute Study

Maryam A Hejazi, Wei Tong, Alastair Stacey, Shi H Sun, Molis Yunzab, Ali Almasi, Young Jun Jung, Hamish Meffin, Kate Fox, Khatereh Edalati, Athavan Nadarajah, Steven Prawer, Michael R Ibbotson, David J Garrett

Journal article  |  2020  |  Advanced Functional Materials

Implantable electrodes that can communicate with a small, selective group of neurons via both neural stimulation and recording are..

Mechanisms of Feature Selectivity and Invariance in Primary Visual Cortex.

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

Journal article  |  2020  |  Cerebral Cortex

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

In vivofeasibility of epiretinal stimulation using ultrananocrystalline diamond electrodes

Mohit N Shivdasani, Mihailo Evans, Owen Burns, Jonathan Yeoh, Penelope J Allen, David AX Nayagam, Joel Villalobos, Carla J Abbott, Chi D Luu, Nicholas L Opie, Anu Sabu, Alexia L Saunders, Michelle McPhedran, Lisa Cardamone, Ceara McGowan, Vanessa Maxim, Richard A Williams, Kate E Fox, Rosemary Cicione, David J Garrett, et al.

Journal article  |  2020  |  Journal of Neural Engineering

OBJECTIVE: Due to their increased proximity to retinal ganglion cells (RGCs), epiretinal visual prostheses present the opportunity..

Minimizing axon bundle activation of retinal ganglion cells with oriented rectangular electrodes.

Wei Tong, Maryam Hejazi, David J Garrett, Timothy Esler, Steven Prawer, Hamish Meffin, Michael Ibbotson

Journal article  |  2020  |  Journal of Neural Engineering

OBJECTIVE: Retinal prostheses aim to restore vision in patients with retinal degenerative diseases, such as age-related macular de..

Stimulation Strategies for Improving the Resolution of Retinal Prostheses.

Wei Tong, Hamish Meffin, David J Garrett, Michael R Ibbotson

Journal article  |  2020  |  Frontiers in Neuroscience

Electrical stimulation using implantable devices with arrays of stimulating electrodes is an emerging therapy for neurological dis..

Improved visual acuity using a retinal implant and an optimized stimulation strategy

Wei Tong, Melanie Stamp, Nicholas Apollo, Kumaravelu Ganesan, Hamish Meffin, Steven Prawer, David J Garrett, Michael R Ibbotson

Journal article  |  2020  |  Journal of Neural Engineering

Objective. Retinal prosthetic devices hold great promise for the treatment of retinal degenerative diseases such as retinitis pigm..

Determination of the electrical impedance of neural tissue from its microscopic cellular constituents

Omid Monfared, Bahman Tahayori, Dean Freestone, Dragan Nesic, David B Grayden, Hamish Meffin

Journal article  |  2020  |  Journal of Neural Engineering

The electrical properties of neural tissue are important in a range of different applications in biomedical engineering and basic ..