Spinal cord (1)Spinal cord (1)

Spinal cord

Meninges,

Dura mater

Arachnoid, Pia mater

Subarachnoid space

Denticulate Ligament

Leptomeninx & pachymeninx

Spinal cord External feature

Cervical enlargmentLumbar enlargment Conus medullaris Filum Terminal Cauda equina Anterior median fissurePosterior median sulcusAnterolateral sulcus Posterolateral Sulcus

http://www.bartleby.com/107/illus663.html

Spinal nerve

Sympathetic part

Internal structure

White matter

Gray matter

• Ant column

• Lat column

• Post column

Internal structure

White matter

Gray matter

• Anterior horn

• Posterior horn

• Lateral horn

http://www.bartleby.com/107/185.html

Gray matterRexed Lamina 10 laminaLamina I, most posterior part of Dorsal horn &Lamina IX , the most ant. Part of anterior horn Lamina X around central canalLamina I-VI( post. horn)II , III (Substantia gelatinosa)Lamina VII( Clark & Intermediolateral) Lamina VIII ( interneuron)Lamina IX ( Ant horn motor n)Lamina X

white matterTract or Fasciculus

Ascending Tract (Sensory receptor )

Sensory n. ending, Dorsal root ganglion

( 1st neuron), Dorsal horn ( 2nd neuron)

Thalamus (3rd neuron)

All ascending tract passed through at least 3 neuron

Extroceptive (Substantia gelatinosa ) , lateral Spinothalamic (pain), Ant spinothal (Simple, crude touch)

Fine touch ( Gracilis & cuneatus fasciculu)

http://www.bartleby.com/107/illus680.html

http://www.bartleby.com/107/190.html

http://www.bartleby.com/107/192.html