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Perception vs Cognition
Definitions and Key Differences
• Perception: The process by which stimuli are interpreted
by the brain, leading to the experience of sensory
information. For example, light waves are interpreted as
different colors.
• Cognition: Involves how attention organizes incoming
stimuli in working memory, allowing for interpretation of
the whole rather than individual stimuli.
• Perception is generally automatic and hardwired, while
cognition requires effort and can modify perception based
on context and prior knowledge.
• Perception is often described as lower-level (bottom-up)
processing, while cognition is higher-level (top-down)
processing.
Mechanisms of Perception
• Perception involves the observation of external stimuli,
such as colors and sounds, and can elicit emotional
responses (e.g., goosebumps due to weather).
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• Most perceptual processes are hardwired and not easily
altered by cognitive efforts, indicating a strong biological
basis.
• Different senses are processed in specialized neural
networks, suggesting a domain-specific approach to
sensory processing.
Mechanisms of Cognition
• Cognition involves organizing representations of stimuli in
the mind, optimizing certain inputs while suppressing
others (e.g., focusing on a friend's voice in a noisy
environment).
• Decision-making processes, such as navigating traffic or
problem-solving, are integral to cognition and utilize
domain-general networks.
• Cognitive processes can influence perception, as seen in
the inability to undo visual illusions despite cognitive
awareness.
Illustrative Examples
• Perception Example: The inability to perceive straight lines
as straight when presented with an optical illusion, despite
knowing they are straight.
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• Cognition Example: In chess, recognizing the colors of
pieces is perception, while strategizing and remembering
their locations involves cognition.
Nervous System Overview
Central Nervous System (CNS)
• The CNS consists of the brain, cerebellum, and spinal cord,
serving as the main control center for processing
information and coordinating responses.
• The brain is divided into several key areas, each
responsible for different functions, including sensory
processing, motor control, and higher cognitive functions.
Peripheral Nervous System (PNS)
• The PNS includes all neural branches extending throughout
the body, connecting the CNS to limbs and organs.
• It plays a crucial role in transmitting sensory information to
the CNS and relaying motor commands from the CNS to
the body.
Brain Structure and Function
Cerebral Lobes and Their Functions
• Frontal Lobes: Responsible for executive functions such as
reasoning, imagination, and planning. They act as short-
Perception vs Cognition
Definitions and Key Differences
• Perception: The process by which stimuli are interpreted
by the brain, leading to the experience of sensory
information. For example, light waves are interpreted as
different colors.
• Cognition: Involves how attention organizes incoming
stimuli in working memory, allowing for interpretation of
the whole rather than individual stimuli.
• Perception is generally automatic and hardwired, while
cognition requires effort and can modify perception based
on context and prior knowledge.
• Perception is often described as lower-level (bottom-up)
processing, while cognition is higher-level (top-down)
processing.
Mechanisms of Perception
• Perception involves the observation of external stimuli,
such as colors and sounds, and can elicit emotional
responses (e.g., goosebumps due to weather).
,Page 2 of 23
• Most perceptual processes are hardwired and not easily
altered by cognitive efforts, indicating a strong biological
basis.
• Different senses are processed in specialized neural
networks, suggesting a domain-specific approach to
sensory processing.
Mechanisms of Cognition
• Cognition involves organizing representations of stimuli in
the mind, optimizing certain inputs while suppressing
others (e.g., focusing on a friend's voice in a noisy
environment).
• Decision-making processes, such as navigating traffic or
problem-solving, are integral to cognition and utilize
domain-general networks.
• Cognitive processes can influence perception, as seen in
the inability to undo visual illusions despite cognitive
awareness.
Illustrative Examples
• Perception Example: The inability to perceive straight lines
as straight when presented with an optical illusion, despite
knowing they are straight.
, Page 3 of 23
• Cognition Example: In chess, recognizing the colors of
pieces is perception, while strategizing and remembering
their locations involves cognition.
Nervous System Overview
Central Nervous System (CNS)
• The CNS consists of the brain, cerebellum, and spinal cord,
serving as the main control center for processing
information and coordinating responses.
• The brain is divided into several key areas, each
responsible for different functions, including sensory
processing, motor control, and higher cognitive functions.
Peripheral Nervous System (PNS)
• The PNS includes all neural branches extending throughout
the body, connecting the CNS to limbs and organs.
• It plays a crucial role in transmitting sensory information to
the CNS and relaying motor commands from the CNS to
the body.
Brain Structure and Function
Cerebral Lobes and Their Functions
• Frontal Lobes: Responsible for executive functions such as
reasoning, imagination, and planning. They act as short-
