lecture5 - Sensory Neuroscience General principles All...

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1 Sensory Neuroscience General principles | All sensory systems convey basic information: z Modality z Location z Intensity z Timing General Principles | Sensory receptor organs are affected by stimuli. | An adequate stimulus is the type of stimulus for which a particular sensory organ is adapted. | Sensory systems of different species have different ranges of responsiveness.
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2 Sensory processing | Receptor cells convert energy of a stimulus into an action potential. | Generator potentials – the steps between the impact of energy at a receptor cell and the initiation of nerve impulses | How does this work? z Example: touch and pain
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3
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4 Neurons also have different thresholds.
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5 Sensory activity can be suppressed | Possible methods: 1) Sensory receptor adaptation 2) Action by accessory structures 3) Central modulation
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6 Cortical Maps | E.g. Somatosensory; Visual; Auditory | Body parts are mapped onto somatosensory cortex | These maps are plastic and can be
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This note was uploaded on 03/01/2009 for the course PSC 121 taught by Professor Henry during the Spring '08 term at UC Davis.

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lecture5 - Sensory Neuroscience General principles All...

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