Difference between revisions of "2012 Group Project 2"

From Embryology
(Central Somatosensory Differentiation)
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== History of Discoveries ==
 
== History of Discoveries ==
  
== Central Somatosensory Differentiation ==  
+
== Central Somatosensory Differentiation ==
 +
 
 +
This is just preliminary work and will be edited later:
 +
 
 +
Dorsal root ganglion (DRG) has sensory neurons that make connections with the periphery and with the CNS
 +
By stage 23;
 +
* Axons of primary afferent neurons have reached the spinal cord
 +
* outgrowth of DRG has just begun
 +
 
 +
After reaching the CNS (spinal cord), these axons of these afferent neurons bifurcate and  begin to extend into the Primordium of the dorsal funiculus
 +
 
 +
By Stage 24:
 +
* the afferent axons have projected 1 segment rostral and 1 segment caudal of their point of entry
 +
* the afferents grow within the white matter (periphery of Spinal Cord)
 +
 
 +
Stage 28 –
 +
* unbranched afferent axonal fibres invade gray matter at the border of Dorsal horn
 +
* axonal fibres extend Rostrally and caudally and start sending fine collateral fibres into the spinal gray matter – the cellular, central region of spinal cord
 +
 
 +
Stage 29:
 +
* afferent fibres have extended into gray matter for 100-200μm
 +
 
 +
<pubmed>2918087</pubmed>
  
 
== Touch ==
 
== Touch ==

Revision as of 10:13, 29 August 2012


Somatosensory Development

--Mark Hill 12:23, 15 August 2012 (EST) This is a better project title.

- Touch, Pain, Hot/Cold, Pressure Reception


Introduction

History of Discoveries

Central Somatosensory Differentiation

This is just preliminary work and will be edited later:

Dorsal root ganglion (DRG) has sensory neurons that make connections with the periphery and with the CNS By stage 23;

  • Axons of primary afferent neurons have reached the spinal cord
  • outgrowth of DRG has just begun

After reaching the CNS (spinal cord), these axons of these afferent neurons bifurcate and begin to extend into the Primordium of the dorsal funiculus

By Stage 24:

  • the afferent axons have projected 1 segment rostral and 1 segment caudal of their point of entry
  • the afferents grow within the white matter (periphery of Spinal Cord)

Stage 28 –

  • unbranched afferent axonal fibres invade gray matter at the border of Dorsal horn
  • axonal fibres extend Rostrally and caudally and start sending fine collateral fibres into the spinal gray matter – the cellular, central region of spinal cord

Stage 29:

  • afferent fibres have extended into gray matter for 100-200μm

<pubmed>2918087</pubmed>

Touch

Pain

Hot/Cold

Pressure

Current Research

Glossary

References


External Links

External Links Notice - The dynamic nature of the internet may mean that some of these listed links may no longer function. If the link no longer works search the web with the link text or name. Links to any external commercial sites are provided for information purposes only and should never be considered an endorsement. UNSW Embryology is provided as an educational resource with no clinical information or commercial affiliation.

--Mark Hill 12:22, 15 August 2012 (EST) Please leave the content listed below the line at the bottom of your project page.


2012 Projects: Vision | Somatosensory | Taste | Olfaction | Abnormal Vision | Hearing