• Mechanoreception
  
  • Pressure, vibration, Kinesthesia, touch,
• Thermoreception
• nociception ( pain)

• information from Periphery receptors through the dorsal root ganglion
• Transmits to second order neuron

• Begins at The spinal cord or brain-stem
• Fibers desiccate and extend to contralateral thalamus
• Transmit to third order neuron

• Fibers Project from thalamus ipsilaterally to somatosensory cortex
• Synapse on cell bodies in the cerebral cortex

• Fine discriminant touch,Conscious proprioception,kinethesia
• Decussation at brainstem\Medulla
• Fasiculli that carry information in spinal cord:
  • Fasciculus gracilis
  • Fasciculus cuneatus
• From the face/head discriminant touch: fifth nerve V

Anterolateral System

Divided into two tracks:

• Lateral spinothalamic track
  • Mediates pain and temperature
• Anterior spinothalamic tract
  • Diffuse unlocalized , crude touch

• Interpretation/integration of sensory experiences
• Involves spatial orientation, body skills,Construction skills And tactile recognition (tactile agnosia)