Touch

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Touch
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Touch Sensitivity Max Von Frey (1896)
Touch Acuity Two-Point Threshold
Localization Acuity
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Texture
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Braille
z
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Afferent Nerve Fibers
Median Nerve Thumb and 2 1/2 fingers
Ulnar nerve Pinky and 1/2 ring finger
Radial Nerve Back of hand and top of arm
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Single Cell Recording
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Four Channel Model of Mechanoreception
SA punctate (SA-I) - what detects Braille SA
diffuse (SA-II) RA punctate (RA) RA diffuse (PC),
or Pacinian corpuscule
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Touch Receptors
Pacinian Corpuscle
Meissner Corpuscle
Ruffini Endings
Free Nerve Endings
Hair Follicle Ending
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Touch Discrimination
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Spinal Reflex
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Left clinical hemisection of spinal cord at level
of T9
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The Gate-Control Theory of Pain