Spin 1 2

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

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

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)