PSY100H1 Lecture Notes - Lecture 8: Visual Cortex, Sensory Cortex, David H. Hubel
Thursday, October 6, 2016
PSY 100: LEC 8
Ta b l e o f C o n t e n t s
-perception
-
Perception
-if you experience a radically different world, you will receive a different perception
system
-Step 1: reality
-Step 2: sensory receptors contact reality
-Step 3: transduction: physical entry of stimulus is converted to electrical energy,
which is sent in pulses to the brain
-Step 4: thalamus: sends info to the sensory processing areas - 'doctrine if specific
nerve energies'
-Step 5: Primary sensory cortex: initial processing of information occurs
-Step 6: Further processing in many other brain areas, linked to higher level
cognitive & perceptual tasks: ex. The "what" & "where" pathways
-Step 7: deciding & acting: many other brain areas (involving memory, planning,
motivation, self-control, etc.) then decide what to do, and tell our motor cortex to
communicate the appropriate actions to muscles in the body
Hierarchical Processing
-processing of visual information occurs in a series of steps, from initial coarse
processing of relatively basic features (ex.lines), to more complex processing (ex.
Face and object recognition)
-Hubel & Wiesel (1963) examined the firing rate of single cells in the primary visual
cortex
-Many were specialized to respond to particular features: "primates"
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Document Summary
If you experience a radically different world, you will receive a different perception system. Step 3: transduction: physical entry of stimulus is converted to electrical energy, which is sent in pulses to the brain. Step 4: thalamus: sends info to the sensory processing areas - "doctrine if speci c nerve energies" Step 5: primary sensory cortex: initial processing of information occurs. Step 6: further processing in many other brain areas, linked to higher level cognitive & perceptual tasks: ex. Step 7: deciding & acting: many other brain areas (involving memory, planning, motivation, self-control, etc. ) then decide what to do, and tell our motor cortex to communicate the appropriate actions to muscles in the body. Processing of visual information occurs in a series of steps, from initial coarse processing of relatively basic features (ex. lines), to more complex processing (ex. Hubel & wiesel (1963) examined the ring rate of single cells in the primary visual cortex.
