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Receptors, Afferent Fibers, Pathways
n/a
14
Anatomy
Professional
02/25/2014
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Term
Nociceptor
 Definition
  • Pain
  • Afferent axon
    • Aδ & C
  • Spinothalamic Tract
  • free nerve ending
Term
Thermoreceptor
 Definition
  • Temperature
  • Afferent axon
    • cold = Aδ
    • warm = C
  • Spinothalamic Tract
  • free nerve ending
Term
Free Nerve Endings
 Definition
  • Crude touch
    • Aδ & C
    • Spinothalamic Tract
  • Itch
    • C
    • Spinothalamic Tract
Term
Hair Follicle Receptor
 Definition
  • Discriminative touch
    • Hair displacement
  • Afferent axon
    • Aβ
  • Dorsal Column-Medial Lemniscus
  • non-encapsulated 
Term
Meissner's Corpuscle
 Definition
  • Discriminative touch
    • Flutter 
  • Afferent axon
    • Aβ
  • dorsal column-medial leminscus
  • Encapsulated
Term
Merkel Complex
 Definition
  • Discriminative Touch
    • Pressure, texture, form, shape
  • Afferent Axon
    • Aβ
  • Dorsal column-medial lemniscus
  • non-encapsulated
Term
Pacinian Corpuscle
 Definition
  • Discriminative touch
    • Vibration/deep pressure
  • Afferent axon
    • Aβ
  • Dorsal column-medial lemniscus
  • encapsulated
Term
Ruffini Ending
 Definition
  • Discriminative Touch
    • skin stretch
  • Afferent axon
    • Aβ
  • Dorsal column-medial lemniscus
  • encapsulated
Term
Golgi Tendon Organs
 Definition
  • Propioception
    • muscle/tendon tension
  • Afferent axon
    • Ib
  • Dorsal columns = conscious
  • Spinocerebellar & cuneocerebellar tracts = unconscious
  • Within tendons
  • encapsulated
Term
Muscle Spindle
 Definition
  • Proprioception
    • muscle stretch/length/rate of change
  • Afferent axon
    • Ia (annulospiral) & II (Aβ) (flower spray)
  • Dorsal columns = conscious
  • Spinocerebellar & cuneocerebellar tracts = unconscious
  • encapsulated
  • distributed in parallel among the extrafusal fibers
Term
Ruffini-Like Joint Receptor
 Definition
  • Proprioception
    • joint position and movement
  • Afferent axon
    • II (Aβ)
  • Dorsal columns = conscious
  • Spinocerebellar & cuneocerebellar tracts = unconscious
  • found in joint capsule and some ligaments
Term
Pacinian-Like Joint Receptor
 Definition
  • Proprioception
    • direction and velocity of joint movement
  • Afferent axon
    • II (Aβ)
  • Dorsal columns = conscious
  • Spinocerebellar & cuneocerebellar tracts = unconscious
  • found in periosteum and articular fat pads
Term
Golgi-Like Joint Receptor
 Definition
  • Propriception
    • Ligament tension
  • Afferent axon
    • Ib
  • Dorsal columns = conscious
  • Spinocerebellar & cuneocerebellar tracts = unconscious
  • found in ligaments
Term
Type IV Joint Receptor (Free Nerve Ending)
 Definition
  • Multimodal
    • Inflammation and Pain (extremes of mechanical or chemical stimulation)
  • Afferent axon
    • III and IV (Aδ and C)
  • Spinothalamic Tract
  • found in muscle, tendons, joint capsule, ligaments
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