Combinación de nuevas técnicas electrofisiológicas y de imagen en el estudio de la función de la corteza visual primaria
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Combinación de nuevas técnicas electrofisiológicas y de imagen en el estudio de la función de la corteza visual primariaFecha
2003Cita bibliográfica
Revisiones en neurociencia, vol. 36(2003), n. 10, p. 944-950
Resumen
This work summarizes current research focused on explaining orientation selectivity of primary visual
cortex (V1), and describes the electrophysiological and imaging techniques than are being used. Development. The study of
orientation selectivity in V1 is key to understanding the cortical mechanisms implicated in the processing of sensory information,
but this enterprise has proved more challenging than previously thought and there is no consensus about the best model to explain
V1 neurons’ activity. Ongoing research is focused on determining the importance of the different inputs that a cortical cell receives
(thalamic and lateral cortical inputs), and their link to cortical architecture. To achieve that, current research is combining optical
imaging techniques with intracellular recordings of V1 neurons. Recent findings have found differences in the synaptic integration
performed by neurons located in the iso-orientation domains vs orientation centers of the functional V1 map. Conclusions. Data
describing synaptic activity combined with the cortical functional structure are yielding new clues about V1 computation, suggesting
that there is more than one mechanism capable of generating orientation selectivity
Palabras clave
Optical imaging of intrinsic signals
Orientation map
Primary visual cortex
Synaptic effects
V1
Orientation map
Primary visual cortex
Synaptic effects
V1