Flashcards in Unit 3: Vision and Eye Movements Deck (32):
L1: "Off"-center ganglion cells are ______ when light is shined in the center of their receptive fields.
L1: "On"-center ganglion cells are ______ when light is shined in the center of their receptive fields.
L1: At the optic chiasm, the _____ half of the axons decussate.
L1: Bipolar cells always supply _____ input to ganglion cells
L1: Color information is processed in the ____ of hypercolumns in the cortex.
L1: Damage to the MLF results in _______, in which there is loss of coordination between contralateral medial and lateral recti.
Internuclear Ophthalmoplegia (INO)
L1: In the LGN layers _____ comprise the magnocellular system.
L1: In the LGN layers _____ comprise the parvocellular system.
3, 4, 5, 6
L1: INO can be distinguished from other neural problems or medial recti problems if _____ is intact.
L1: Photoreceptors are ____-polarized when they receive light.
L1: Saccades are driven _____-laterally
L1: What type of cell? Cells found at the border of ocular dominance columns
L1: What type of cell? Maps a receptive field shape corresponding to a narrow line with specific orientation.
L1: What type of cell? Mediates depth perception, receives input from both eyes
L1: What type of cell? Receptive fields that abstract for position such that a line/edge can be identified anywhere in the visual field
L1: What type of cell? Useful for seeing movement in the visual field
L2: _____ frontal eye field activates the _____ abducens nucleus resulting in a left saccade.
L2: _____ frontal eye field activates the _____ abducens nucleus resulting in a right saccade.
L2: _____: rhythmic pattern of saccades and tracking movements that occurs when watching objects go by in a car, for example
L2: Ganglion cells synapse at the ______, which sends optic radiations to the visual cortex.
L2: Horizontal cells are ______ by neurotransmitter release from photoreceptors, such that shining light on the receptive field _____ horizontal cells.
L2: Horizontal cells project to nearby photoreceptors to supply _____ input.
L2: In the LGN, layers _____ receive input from the contralateral eye
L2: In the LGN, layers _____ receive input from the ipsilateral eye
L2: Lesion in the ______ decreases the accuracy of saccades
L2: Lesion in the ______ generates temporary loss of ability to make saccades.
Frontal Eye Field
L2: The Frontal Eye Field activates saccades via ______ or _______.
reticular formation, superior colliculus (to reticular formation)
L2: The magnocellular system invovles ____ receptive fields and ____ acuity.
L2: The parvocellular system involves ____ receptive fields and ____ acuity.
L2: What is the pattern generator for saccades?
Paramedian pontine reticular formation (PPRF)
L2: Which system in the LGN responds to color?