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Unformatted text preview: Quick Review: Ways sensory system can code for stimulus: o Labeled line = modality, location o Firing rate = intensity Alone can't encode for all stimuli (1200/sec = max) => Recruitment of populations with low/med/high thresholds Range Fractionation - can also tell location by comparison of rates Location: Labeled line Firing rate On set/off set (ex: which ear hears first) Basic Structure of Somatosensory System : Levels of sensory processing Hierarchically organized Spinal Cord --> Brainstem --> Thalamus --> Cortex Midbrain Spinal Cord = simple response Cortex = most complex response 1o Sensory cortex 2o sensory cortex Non-1o sensory cortex General Common Features of Sensory Systems: 1. Serial Processing = move from simple --> complex processing as move up hierarchy 2. Parallel Processing - can receive stimulus info from multiple areas at one time 3. Sensory Maps - unequal distribution of parallel processing (ex: face more sensitive than...
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This note was uploaded on 04/05/2008 for the course BIOL 455 taught by Professor Sabrinaburmeister during the Spring '08 term at UNC.
- Spring '08