Describe the path of input of visual information coming in from the nasal portion of the left visual field . The axons from the magnocellular cells in layer 1 of the LGN will synapse on cells in layer 4Ca of the primary visual cortex. In these layers, inputs from the contralateral eye form alternating ocular dominance columns with inputs from the ipsilateral eye. WHY the receptive fields of the complex cells in the primary visual cortex are sensitive to orientation and size, but not to location. This characteristic of complex cells is the result of convergence .
Complex cells appear to receive inputs from multiple simple cells.
Simple cells are location-specific and only fire when the stimulus is in a particular part of the visual field. Briefly describe the phenomena of blindsight. Give at least 3 explanations for why this phenomenon may occur. Yet, if the experimenter encourages the subject to make a guess at where the stimulus occurred, the patient is reasonably accurate at making saccades to the stimulus. This demonstrates that there is some preserved ability to perceive stimulus location after damage to primary visual cortex, but that this perception can be dissociated from conscious awareness of the stimulus.