Lecture 6 Sensation - Lecture6.Sensations Sensory Systems...

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Lecture 6. Sensations •Sensory Systems 1. Taste (gustatory system) 2. Smell (olfactory system) 3. Hearing (auditory system) •What is the difference between sensation and perception? -Perception: our experience of the world that is supported by the brain’s further processing of sensory signals -Sensation is how the receptors in our body transduce physical energy into neural energy (I.e. detection of external stimulus energy) transduction: the process by which sensory receptors transform physical energy (e.g. pressure, gravity, light) into electrical energy 1. The Gustatory System ( taste ) taste buds: sensory receptors; transduce chemicals into taste information : papellete 2. The olfactory System (smell) -oldest sense chemical sense/ proust effect —when u smell something, it conjures up the memory -direct projection to the cortex Olfactory bulb- pyriform cortex 3. Somatosensory System (Touch) -Pacinian corpuscle: pain and pressure -Ruffini organ: measures stretch in the skin -Merkel Disks: Pressure and texture -Free nerve endings: pain - Mechanoreceptors are responsible for turning mechanical energy into an electrical signal. -touch sensitivity in certain body structures is dependent on the density of receptors in the skin.
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Lecture 6 Sensation - Lecture6.Sensations Sensory Systems...

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