Perception
Nascom introduction sensation-perception
Jul 18, 2015
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Perception
Energy Sensation
Receiving
information from the
environment
Transduction =
converting sensory
stimulation in neural
activity
Perception
Organising and
interpretation of
sensory
information
(Phenomenology)
Environment Physiology Brain/Cognition
Environment
Sensation
Sensation
Weak
stimulus
Strong
stimulus
on off
on off
Sensation
Bottom-up
Top-down
Sensation
Brain / Cognition
From knowledge of previous interactions with the
environment
Information form environment through our senses
From vision
Environment
Environment
Sensation
1.5 mm (1% retina), 50% neural pathways in
eye, 50% visual cortex
Sensation
Sensation
Sensation
• Red : 64 %
• Green: 32%
• Blue: 2%
120 million 6 million
Sensation
Sensation
Sensation
Sensation
Sensation
D I H C N R L A Z I F W N S M Q P Z K D X
Sensation
Sensation
Sensation
+
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-down
Top-downTop-down
Top-down
Top-down
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