Central thalamic radiation VPL Conscious proprioceptive 3rd neuron bo and fine touch pathway of trunk and limbs Medial lemniscus Gracile and cuneate nuclei 2nd neuron body Decussation of medial lemniscus Fasciculus cuneatus T4 Spinal ganglion h- Fasciculus gracilis 1st neuron bod VPL-ventral posterolateral nucleus
Conscious proprioceptive and fine touch pathway of trunk and limbs Spinal ganglion 1st neuron body Fasciculus gracilis Fasciculus cuneatus Gracile and cuneate nuclei 2nd neuron body Decussation of medial lemniscus Medial lemniscus VPL 3rd neuron body Central thalamic radiation T4 VPL-ventral posterolateral nucleus
Fasciculus gracilis Fasciculus cuneatus Fasciculus cuneatus Fasciculus gracilis pinal ganglion
Fasciculus gracilis Fasciculus cuneatus Fasciculus gracilis Fasciculus cuneatus Spinal ganglion
Features of Conscious proprioceptive and fine touch pathway of trunk limbs Cell body position of 1st order neuron Spinal ganglion Cell body position of 2nd order neuron Gracile and cuneate nuclei in medulla oblongata Cell body position of 3rd order neuron Ventral posterolateral nucleus(VPL)in thalamus Position of decussation Upper portion of medulla ablongata Position of fiber tract in spinal cord Post funiculus of spinal cord Name of fiber tract in brain stem Medial lemniscus Position in internal capsule Posterior limb Projection area in cortex Upper 2/3 of postcentral gyrus and ant. part of paracentral lobula The feature (A)Fasciculus gracils- conduct sensory impulse above T 4; Fasciculus cuneatus--conduct sensory impulse below T 5 B)Fiber arrangement in post funiculus are fiber from sacral, lumbar, thoracic and cervical part from medial to lateral
Cell body position of 1st order neuron Spinal ganglion Cell body position of 2nd order neuron Gracile and cuneate nuclei in medulla ablongata Cell body position of 3rd order neuron Ventral posterolateral nucleus (VPL) in thalamus Position of decussation Upper portion of medulla ablongata Position of fiber tract in spinal cord Post.funiculus of spinal cord Name of fiber tract in brain stem Medial lemniscus Position in internal capsule Posterior limb Projection area in cortex Upper 2/3 of postcentral gyrus and ant.part of paracentral lobula The feature: (A)Fasciculus gracils – conduct sensory impulse above T 4;Fasciculus cuneatus-– conduct sensory impulse below T 5; (B)Fiber arrangement in post funiculus are fiber from sacral,lumbar,thoracic and cervical part from medial to lateral Features of Conscious proprioceptive and fine touch pathway of trunk & limbs
Central thalamic radiation Pain, temperature VPL and crude touch 3rd neuron body athway of trunk and limbs Spinal lemniscus Ant spinothalamic tract Lamina I ivvi d neuron bod Lat spinothalamic tract Spinal ganglia 1st neuron body VPL-ventral posterolateral nucleus
Spinal ganglia 1st neuron body LaminaⅠ,Ⅳ~Ⅶ 2nd neuron body Lat. spinothalamic tract Ant.spinothalamic tract Spinal lemniscus VPL 3rd neuron body Central thalamic radiation Pain, temperature and crude touch pathway of trunk and limbs VPL-ventral posterolateral nucleus
Spinothalamus tract Spinal ganglion
Spinothalamus tract Spinal ganglion