Download Sensory Cortex

Sinan Canan, PhD
[email protected]
http://www.sinancanan.net
Somatic Senses
  Mechanoreception (touch-proprioception)
  Touch: Course-fine touch, pressure, vibration
[fast-slow], tickling, itch…
  Proprioception: Static and dynamic
 
Joint, skin and muscle receptors and deep
receptors…
  Thermoreception: (hot-cold sensation)
  Pain sensation
Somatic Senses
  Exteroceptive senses (body surface)
  Proprioceptive senses (body position)
  Visceral senses (inner organs)
  Deep senses (fasia, bone, muscle tissue)
Sensory receptors
Iggo receptors: Fine touch,
sense of texture
Encoding the Sensory Signals
Somatic Sensory Pathways
Two Fundamental Pathways
1.  Dorsal column-medial lemniscus system
(Fine touch, vibration, concious
proprioseption)
2.  Anterolateral system
(Temperature, crude touch, itching... etc.)
Somatic Sensory Pathways
Somatic Sensory Pathways
Dorsal columnmedial lemniscal
pathway
Dorsal column-medial lemniscal pathway
Anterolateral
System
  Coarse touch-
pressure;
  Pain;
  Heat;
  Itch;
  Tickle
  Sexual sensations
Neocortex
Somatic sensory areas
Motor and Sensory “Homunculus”
Motor ve Sensory Areas
Cortical column s
Prof. Vernon Mountcastle
Cortical column s
Cortical coding
Stimulus intensity
Cortical coding
Stimulus
localization
Sense of Joint Position
The End