Biological aspects: Visual system 1 0.0 / 5 ? PsychologyVisual system 1UniversityNone Created by: CanveySamCreated on: 13-05-15 09:59 2 main areas to consider? 1) Retina 2) Central visual pathway 1 of 34 What is the retina? A sheet of photoreceptors and connecting neurons 2 of 34 the photoreceptors are situation ... the neurons BEHIND the neurons 3 of 34 Photoreceptors: Rods and ...? rods and CONES 4 of 34 What do rod system do? 1) Mediate nocturnal vision 2)convergent pathway to ganglion cells 3) sensitive but poor spatial 5 of 34 what does the cone system do? 1) mediate colour vision 2) direct pathway to ganglion cells 3) low sensitive; high spatial 6 of 34 Fovea only contains ...? Cones 7 of 34 In the rest of the retina, ... are more frequent than ... rods more frequent than cones 8 of 34 Describe route of light to ganglion cells Light, Rhodopsin split, membrane changes, bipolar cells, ganglion cells 9 of 34 Proper name for the blind spot Macula cieca 10 of 34 What do M and P cells stand for? Magnocellular and Parvocellular 11 of 34 What is an M cell? large cell body, rich dendritic ramification 12 of 34 what is a P cell? small cell body, limited ramification 13 of 34 What do M cells pick up? (large receptive fields) large objects, movement 14 of 34 what do P cells pick up? (small receptive fields) small objects, details, colour 15 of 34 Architecture of LGN is highly ... organised 16 of 34 What is the LGN? Lateral geniculate nuclei 17 of 34 Layers 2,3,5 receive input from the ... retina ipsilateral retina 18 of 34 Layers 1,4,6 recevie input from the ... retina contralateral retina 19 of 34 Primary visual are, BA ?? BA17 20 of 34 M or P pathway for movement? M pathway 21 of 34 M or P pathway for colour and details? P pathway 22 of 34 Receptive fields in the ... are more complex than those found in the ... and ... cortex more complex than those in the retina and lateral geniculate nucleus 23 of 34 Input from the LGN reaches WHICH layer of visual cortex? IV 24 of 34 Visual cortex is organised in ... organised in COLUMNS 25 of 34 LGN to which layer? IV, V1 26 of 34 Colour, which area? V4 27 of 34 Motion, which area? V5 28 of 34 Brain lesion in V5 have been associated in ? Akinetopsia 29 of 34 Brain lesion in V4 have been associated in? Achromatopsia 30 of 34 Dorsal pathway for ... where? (object location) 31 of 34 Ventral pathway for ... what? (object recognition) 32 of 34 bilateral lesions of parieto-occipital Balint's syndrome 33 of 34 lesions in the occipital-temporal area? Agnosia 34 of 34
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