chapter 5 Sensation & Perception

dr richards had brain damage and can no longer

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Unformatted text preview: Receptors for pain and temperature are free nerve endings - The amount of somatosensory cortex devoted to a certain body part means that body part is more sensitive to touch (eg. Lips, fingers) - Phantom limb phenomenon: amputees experience sensations coming from their missing Psych 1000 My Notes Page 33 - Phantom limb phenomenon: amputees experience sensations coming from their missing limb The neurons that used to connect to the limb sends false signals to the brain BodySenses - Kinesthesis provides us feedback about our muscles and joints' positions and movements Gives us information needed to make proper movements - Vestibular sense: sense of body orientation or equilibrium Located in the inner ear in the vestibular apparatus One part of the equilibrium system contains three semicircular canals which contain the receptors for head movement Only sensitive to acceleration Perception:TheCreationofExperience - To create perception: there are 2 kinds of functions Bottom ­up processing: the system takes in individual elements of the stimulus and combines it into a unified perception Top ­down processing: make use of higher order knowledge PerceptionisSelective:Theroleofattention - Many sensory messages fire as you read, but only a few are registered in your awareness Eg. How does your toe feel as you read? You can shift to these unregistered information at any given time - Attention involves 2 processes of selection 1. Focusing on certain stimuli 2. Filtering out other incoming information - Studied experimentally through a technique called shadowing When 2 things are happening at once, you can only pay attention to one of them and not both EnvironmentalandPersonalFactorsinAttention - Environment can attract our attention through intensity, novelty, movement, contrast, and repitition - Our interests and motives also influence what stimuli we will notice Eg. We are sensitive to food related cues when we are hungry - We are particularly sensitive to stimuli that might be a threat Eg. When shown a picture of a happy person in an angry crowd, it takes longer to perceive than an angry person in a happy crowd PerceptionsHaveOrga...
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