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Individual differences |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |
Biological: Behavioural genetics · Evolutionary psychology · Neuroanatomy · Neurochemistry · Neuroendocrinology · Neuroscience · Psychoneuroimmunology · Physiological Psychology · Psychopharmacology (Index, Outline)
Different sensory receptors are innervated by different types of nerve fibers. Proprioceptors are innervated by type Ia, Ib and II sensory fibers, mechanoreceptors by type II and III sensory fibers and nociceptors and thermoreceptors by type III and IV sensory fibers.
|Type|| Erlanger-Gasser |
|Diameter (µm)||Myelin||Conduction velocity||Associated sensory receptors|
|Ia||Aα||13-20||Yes||80–120 m/s||Primary receptors of muscle spindle|
|Ib||Aα||13-20||Yes||80–120 m/s||Golgi tendon organ|
|II||Aβ||6-12||Yes||33–75 m/s|| Secondary receptors of muscle spindle |
All cutaneous mechanoreceptors
|III||Aδ||1-5||Thin||3–30 m/s|| Free nerve endings of touch and pressure |
Nociceptors of neospinothalamic tract
|IV||C||0.2-1.5||No||0.5-2.0 m/s|| Nociceptors of paleospinothalamic tract |
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