PNB 2XA3 Lecture Notes - Lecture 5: Emergency Vehicle Lighting, Edge Detection, David H. Hubel
23 Sep 2018
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Lecture 5 – Wednesday September 12
• 2 steps taking place – taking in info and making interpretations
• Tolman and Honzik Rats – latent learning is more powerful than reward training
o The rats that were rewarded on trial 11 did better than those that were rewarded every
single time
o The group of rats that were never given a reward but started to get reward ex. after 17
would learn through latent learning
• Perceiving the world
o We see the world in terms of meaningful objects
o The visual stimulus that our brain receives does not consist of objects
o Stimulus projects on retina and gives a 2D representation of different colours and
intensities of light
• Perception is not equal to sensation
o Therefore a lot of processing needs to be done, and
assumptions need to be made by our perceptual system
o Visual input needs to be organized
o Our perception goes beyond the info given
• Specificity of Neurons in the Visual System
o Different kinds of neurons have different receptive fields
o Ex. line orientation, edge detection, center-surround,
direction of movement
• Hubel and Weisel
o Light bar was stimulus projected on screen
o Single-cell recording
• Center-Surround Cells
