PSYC 1001: Sensation and Perception Essay
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At A Glance
- Sense organs receive sensory stimulation, convert it into neural activity, and deliver it to the brain.
- The brain processes inputs from all senses simultaneously. Aspects of both the stimuli and the perceiver can affect how sensory information is interpreted.
- In vision, the lens of the eye focuses light on the retina. Rods, cones, and other retinal cells transmit information along the optic nerve to the brain.
- Different wavelengths of light are processed by cone receptor cells in the eye. The brain processes the pattern of signals received from the cones, resulting in color perception.
- In the brain the thalamus relays information from the optic nerve to the parietal and temporal lobes, where it is interpreted as color, movement, size, distance, or boundaries.
- Sound waves are sensed by hair cells in the organ of Corti, which transmit sound frequency and intensity information to the auditory cortex.
- Hair cells in the ear allow detection of sound volume and pitch (the perception of sound as high or low). Slight variations in when sound waves reach each ear help the brain determine the location of the sound. PSYC 1001: Sensation and Perception Essay
- Tongue receptors detect sweet, sour, salty, bitter, and umami (savory) tastes and may also detect fat and starch.
- Olfactory receptors each detect a specific odorant, or chemical odor. Smell plays a significant role in taste and helps protect against eating spoiled food.
- The somatosensory system detects bodily sensations such as temperature, pressure, and pain. Pain perception includes emotional components and does not align perfectly with sensory inputs.
- Proprioception indicates the body’s position and orientation in space. The vestibular sense maintains balance and equilibrium.
- Subliminal information is processed by the brain outside of conscious awareness. In some limited situations subliminal information may influence attitudes, preferences, or behaviors.
- Some people believe in extrasensory perception (ESP), the ability to perceive information undetectable by the five senses, but evidence for ESP has not been demonstrated in well-designed studies. PSYC 1001: Sensation and Perception Essay
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