感覺/
上行徑路
上行徑路
1°:
2°:
- → sensory decussation/arcuate fibers (Posterior external arcuate fibers、Internal arcuate fibers) → Medial lemniscus/Trigeminal lemniscus → 丘腦 (VPL、VPM)
3°:
快速徑路/外側
- 1° (Free nerve ending → A delta fiber) → 2° (Anterior white commissure → Lateral and Anterior 脊髓丘腦束 → 脊髓丘腦束 → VPL of 丘腦) → 3° (中央後回) → 4° (Posterior parietal cortex)
2° (Spinomesencephalic tract → Superior colliculus of Midbrain tectum)
慢速徑路/內側
- 1° (Group C nerve fiber → Spinoreticular tract → Reticular formation) → 2° (丘腦內腹核) → 3° (扣帶皮層)
運動/
下行徑路
下行徑路
錐體徑
- flexion: 初級運動皮層 → Posterior limb of internal capsule → Decussation of pyramids → 皮質脊髓徑 (Lateral, Anterior) → 神經肌肉接點
direct:
1° (運動皮層 → 紋狀體) → 2° (GPi) → 3° (Lenticular fasciculus/Ansa lenticularis → Thalamic fasciculus → VL of 丘腦) → 4° (Thalamocortical radiations → Supplementary motor area) → 5° (運動皮層)
indirect:
1° (運動皮層 → 紋狀體) → 2° (GPe) → 3° (Subthalamic fasciculus → Subthalamic nucleus) → 4° (Subthalamic fasciculus → GPi) → 5° (Lenticular fasciculus/Ansa lenticularis → Thalamic fasciculus → VL of 丘腦) → 6° (Thalamocortical radiations → Supplementary motor area) → 7° (運動皮層)
Afferent
- 下橄欖核 → Olivocerebellar tract → ICP → Hemisphere → Purkinje cell → 小腦深部核團
Efferent
- Dentate nucleus in Lateral hemisphere/pontocerebellum → SCP → Dentatothalamic tract → 丘腦 (VL) → 運動皮層
Bidirectional:
Spinocerebellar
Spinocerebellar
- lower limb → 1° (muscle spindles → DRG) → 2° (Posterior thoracic nucleus → Dorsal/posterior spinocerebellar tract → ICP → 小腦蚓部)
- 上肢 → 1° (muscle spindles → DRG) → 2° (Accessory cuneate nucleus → Cuneocerebellar tract → ICP → Anterior lobe of cerebellum)
- lower limb → 1° (Golgi tendon organ) → 2° (Ventral/anterior spinocerebellar tract→ SCP → 蚓部)
- upper limb → 1° (Golgi tendon organ) → 2° (Rostral spinocerebellar tract → ICP → 小腦)
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