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TOUCH, HAPTICS & PROPRIOCEPTION
Touch ,[object Object],[object Object],[object Object]
Receptive Field ,[object Object]
Receptive Field
Receptive Field The two-point threshold for any part of the body is determined by the size of the receptive fields and the extent of overlap
Receptive Field The two-point threshold for any part of the body is determined by the size of the receptive fields and the extent of overlap
Types of Fibers ,[object Object],[object Object],[object Object],[object Object]
The nerve fibers enervate four receptor types ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Four Receptor Types ,[object Object],[object Object],[object Object],[object Object]
Cross Section of the Skin
Peripheral Pathways of Touch ,[object Object],[object Object],[object Object],[object Object],[object Object]
Peripheral Pathways for Touch
Peripheral Pathways For Touch
Cortical Pathways of Touch
Sensation of Touch ,[object Object],[object Object]
Cortical Magnification ,[object Object]
Cortical Magnification corresponds to greater acuity
Cortical Plasticity for Touch
Faculties of Touch ,[object Object],[object Object],[object Object],[object Object]
Object Identification ,[object Object],[object Object],[object Object]
Haptics ,[object Object],[object Object]
Haptics
Spatial Frequencies ,[object Object],[object Object],[object Object],[object Object],[object Object]
Proprioception ,[object Object],[object Object],[object Object]
Proprioception
Prioprioception Includes  The Vestibular Sense Ocular Motor
Haptics, Proprioception and Object Location ,[object Object],[object Object],[object Object]
Interactions of Touch  & Vision
 
Thermal Conductance  ,[object Object],[object Object],[object Object],[object Object]
Pain ,[object Object],Somatosensory Cortex Thalamus Spinal Cord Dorsal Horn Nerve Free Nerve Ending
Pain ,[object Object],[object Object],[object Object],Somatosensory Cortex Thalamus Spinal Cord Dorsal Horn Nerve Muscle Free Nerve Ending
Pain: The Reflex Arc
Gaiting Pain ,[object Object],[object Object],[object Object],[object Object],Cortex Thalamus Spinal Cord Dorsal Horn Nerve Free Nerve Ending
Gating Pain: Dorsal Horn (Root) Back Chest
Spino-Thalamic Pathway:  Temperature & Pain
Medial Lemniscal Pathway:  Mechanoreceptors &  Proprioception
Phantom Pain ,[object Object],[object Object],[object Object]
Phantom Pain:  Strange Facts ,[object Object],[object Object],[object Object]
Phantom Pain:  A Theory ,[object Object],[object Object],[object Object],[object Object],[object Object]
Phantom Pain The cortical areas for the face annex the cortical areas for the arm and fingers. Some of those neurons were previously specialized for pain.
Phantom Pain ,[object Object],[object Object],[object Object],[object Object]

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12 touch