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Lecture 5

Notes - Lecture 5 (February 10).docx

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Department
Neuroscience
Course
NROC64H3
Professor
Matthias Niemeier
Semester
Fall

Description
NROC64H3SSensory and Motor SystemsLecture 5021212 IntroductionSomatic SensationBody able to feel itselfenvironment ache chillResponsible for touch and painSomatic Sensory system Different from other systemsReceptors Distributed throughout and respond to different types of stimuliTouchWhat Receptors are InvolvedTypes of layers of skinHairy and hairlessglaborous EPIDERMISouter and DERMISinnerFunctions Protect prevent evaporation provide direct contact with worldMechanoreceptorsMajority of somatosensory receptorsSkin hear blood vessels organs gumUNMYLENIATED AXON BRANCHES W mechano Ion channelsPacinian corpuscles Ruffinis endings Meissners corpuscles Merkels disks Krause end bulbsAke Vallbo and colleagues Primary Afferent Neurons Receptive Field Size and Adaptation Rate st Skin slip 1 contact pattern texture recognition lateral stretch hand shapeWhat causes Frequency Tuning Onionlike encapsulation of Pacinian corpuscles2Point Discrimination Density of receptors neural capacity convergence receptive field size special mechanisms
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