Introduction to Perception Flashcards
What are some examples of sensory Modalities?
- Somatic Sensation (Discriminative Touch, Proprioception, Pain, Temperature)
- Vision
- Hearing
- Balance
- Olfactory
- Gustatory
What is a sub modality? Give an example.
Differences in the quality of the sensation being perceived.
Vision: color, distance, movement
What is sensation?
Awareness due to stimulation of a sense organ
What are the components of a sensory system?
- Receptors (Sense Organs)
- Pathways
- Target Areas
What are the common features of the sensory modalities?
- A physical stimulus
- Transformation of the stimulus into neuron signals.
- A response to the signals in the form of a perception or conscious experience of sensation.
What is perception?
An internal construction of the external world according to CNS constraints.
Ex. Taste, sound, smell, color tones
What does a neural code do?
Describes the relationship between the activity in a specified neural population and its functional consequences.
What are the 4 attributes of stimuli?
- Modality
- Location
- Intensity
- Timing/Duration
What is a modality, give an example, and how do we code for it?
- Defines a general class of stimulus (ex. touch)
- We code for it by the stimulus energy and the RECEPTORS specialized to sense that energy.
What is the labeled line code?
The coding mechanism for stimulus modality and is based on the specificity of response in receptors.
What are sensory receptors?
- First cell in each sensory pathway
- specialized to transform stimulus energy into electrical energy (signals)
How are sensory receptors classified?
- based on the type of stimulus energy that they are most sensitive to
What are the properties of the modality?
- Each receptor responds to a narrow range of stimulus energy
- They transduce stimulus energy into electrical signals (receptor potentials).
Which modalities use the Ionotropic mechanism?
- Somatosensory
- Viscerosensory
- Auditory
- Vestibular
- Gustatory
Which modalitise use the Metabotropic Mechanism?
- Somatosensory
- Visual
- Olfactory
- Gustatory