Untitled Deck Flashcards
What is Sensation?
The process of detecting, converting, and transmitting raw sensory information from the external and internal environments to the brain.
what is perception?
The process of selecting, organizing, and interpreting sensory information into meaningful patterns.
What are the Stages of Sensation?
sense, convert, transmit, perceive
sense
receptor cells detect stimuli.
convert
Receptor cells transduce stimuli into neural impulses.
transmit
Messages travel to the brain via the nervous system.
perceive
The brain assigns meaning to sensory input.
What is Absolute Threshold?
The minimum amount of stimulus needed to be consciously detected 50% of the time.
What is Difference Threshold?
The minimal difference in stimulus strength that is detectable 50% of the time.
What is Sensory Adaptation?
When a constant stimulus is presented, sensory receptors become less sensitive and fire less frequently.
What is Gate Control Theory?
the experience of pain depends on whether the message passes the “gatekeeper” in the spinal cord.
What is Phantom Limb Pain?
Sensations, including pain, in a missing limb due to conflicting nerve signals.
What is the Pathway of Light in Vision?
Light -> Cornea -> Pupil -> Lens -> Retina -> Optic Nerve.
Nearsightedness
image reaches focus infront of the retina (can see near objects
Farsightedness:
image reaches focus behindthe retina (can see far away objects)
what is the Trichromatic Theory of Color?
Three color-sensitive systems: red, green, and blue; mixing them produces full color perception.
What is the Opponent-Process Theory?
Color perception is based on opposing color pairs: blue/yellow, red/green, black/white.
What is the Pathway of Sound in Hearing?
Ear Drum -> Hammer -> Anvil -> Stirrup -> Cochlea.
What is Olfaction?
The sense of smell; information is processed in the olfactory bulb, bypassing the thalamus.
What is the Purpose of Taste (Gustation)?
Helps detect safe vs. harmful foods; taste receptors transduce information to the brain.
What are Gestalt Principles?
The brain organizes sensory input into whole patterns, such as figure-ground perception.
What is Bottom-Up Processing?
Sensory data is sent up to the brain for higher-level analysis.
What is Top-Down Processing?
Perception is driven by expectations and prior knowledge.
What is Consciousness?
Awareness of internal events and external environment.