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This paper discusses the discovery of the MT region of the primate cerebral cortex and how it has allowed for greater understanding of the visual areas of the brain in general. The paper explains how the advent of more sophisticated computer technologies as well as imagery systems has allowed for more advanced work concerning the MT region, and, neural response models gained from macaque MT experimentation has been invaluable to the field of visual and motion processing. The paper concludes that the future lies in the use of current and future technologies and their ability to be hypersensitive without being invasive to corroborate the macaque findings against future human trials.
From the Paper:"The location of the MT region contains dense myelination within its lower layers which corresponds to better response toward drifting bar stimuli rather than flashing spots (Van Essen et al 1981). In regards to connectivity, the MT region interconnects to both the cortex and subcortical structures (Lewis & Van Essen, 2000) receiving direct projections from the V1 and V2 areas (Albright, T.D. 1984). Its corticocortical connections correlate to the target structures implicated in optic flow analysis and eye movement generation (Born & Bradley, 2005).
"Using microelectrodes inserted in the parasagittal plane positioned dorsoanteriorally to ventroposteriorally of macaques, single neuron recordings within the MT region looked to extrapolate direction and orientation selectivity against similar neuronal recordings within the V1 region (Albright, T.D. 1984). The macaques were presented with three types of stimuli: a moving slit, a moving spot, and a moving random-dot field; the experiment yielded support for the MT region as a specialized area surpassing the V1 region in stimulus motion processing (Albright, T.D. 1984)."
Sample of Sources Used:
- Albright, T.D. (1984). Direction and orientation selectivity of neurons in visual area MT of the macaque. Journal of Neurophysiology, 52(6), 1106-30.
- Born, R.T. & Bradley, D.C. (2005). Structure and Function of Visual Area MT. Annual Review of Neuroscience, 28, 157-89.
- Bradley, D.C. et al. (1995). Integration of motion and stereopsis in middle temporal cortical area of macaques. Nature, 373(6515), 609-11.
- Dodd, J.V., et al. (2001). Perpetually bistable three-dimensional figures evoke high choice probabilities in cortical area MT. Journal of Neuroscience, 21(13), 4809-21.
- Felleman, D.J. & Van Essen, D.C. (1991). Distributed hierarchical processing in the primate cerebral cortex. Cerebral Cortex, 1(1), 1-47.
Cite this Research Paper:
Exploring the MT Region of the Brain (2013, January 31) Retrieved May 23, 2022, from https://www.academon.com/research-paper/exploring-the-mt-region-of-the-brain-152353/
"Exploring the MT Region of the Brain" 31 January 2013. Web. 23 May. 2022. <https://www.academon.com/research-paper/exploring-the-mt-region-of-the-brain-152353/>