| Título: | A neural network model of the primate saccadic system / |
| Autores: | Hafed, Ziad M. |
| Fecha: | 1999 |
| Publicador: | McGill University - MCGILL |
| Fuente: |
 |
| Tipo: | Electronic Thesis or Dissertation |
| Tema: |
Biology, Neuroscience. Engineering, Biomedical. |
| Descripción: | A new, distributed model of the primate oculomotor system is presented. This model generates saccades (rapid eye movements) of various amplitudes, and it is able to exhibit various saccade-related phenomena, including multiple and interrupted saccades. The model differs from those in the literature in some of its hypotheses about the roles of the classes of neurons investigated here, but it remains largely in line with the current knowledge about saccade generation. The Superior Colliculus (a layered structure in the midbrain) plays a particularly important role in the model, and it is represented by three different layers: visual, burst, and buildup. The burst layer includes neurons that encode initial motor error, while the buildup layer houses cells whose shifting activity during a saccade provides an estimate for dynamic motor error. Collicular fixation neurons are also modeled, and they are characterized by a Winner-Take-All competition with burst neurons. Such a competition dictates whether a saccade is generated or not. Other saccade-related brainstem, structures, including omnipause neurons, medium-lead burst neurons, and the neural integrator, are also modeled. |
| Idioma: | en |
1 Investigations on the form-genera Beauveria and Tritirachium por MacLeod, Donald Murdock | 6 Treatment and recovery in first-episode psychosis : a qualitative analysis of client experiences por Windell, Deborah L. |
2 Seismic sensitivity of tall guyed telecommunication towers. por Ghodrati Amiri, Gholamreza. | 7 |
3 Exploring the Relationship Between Assets and Family Stress Among Low-Income Families por Rothwell, David W.,Han, Chang-Keun | 8 |
4 The case for asset-based interventions with indigenous peoples: Evidence from Hawai‘i por Rothwell, David W. | 9 |
5 Second Thoughts: Who Almost Participates in an IDA Program? por Rothwell, David W.,Han, Chang-Keun | 10 Recent contributions to the phenomenology of musical time : a critical survey por Beaudreau, Pierre |