Overview of the different types of sensory fibres.

1. C.Riedinger
Overview of sensory fibres
Alternative
Fibre Size Type Function Synapse Anoxia Anaestetics
nomenclature
blocked 4th as
fast myelinated proprio-receptors of many Na+
A-alpha I thickest outer parts blocked 1st
NOT present in skin! skeletal muscle channels = "satiety
factor"
touch, proprioception, blocked 1st as
A-beta II thick middle-myelinated mechano-receptors of deeper large fibres have blocked 3rd
skin little E reserves
stabbing pain, cold
A-delta III medium slow myelinated deeper blocked 2nd blocked 2nd
temperature
burning pain, aching
AC IV thin slow unmyelinated pain, itch, warm ventral, deepest blocked 3rd blocked 1st
temperature