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Spinothalamic Tracts (Pain & Temperature) Content:
This pathway is responsible for fine touch, vibration, and conscious proprioception. It consists of two main bundles:The Fasciculus Gracilis: Carries information from the lower limbs and lower trunk (below T6).The Fasciculus Cuneatus: Carries information from the upper limbs and upper trunk (above T6).These fibers decussate (cross over) in the medulla, meaning the left side of the brain processes sensations from the right side of the body. The Spinothalamic Tracts
| Tract | Modality | Decussation | |-------|----------|--------------| | Lateral Spinothalamic | Pain, temperature | Spinal cord | | Anterior Spinothalamic | Crude touch, pressure | Spinal cord | | Fasciculus Gracilis & Cuneatus | Fine touch, vibration, proprioception | Medulla | | Posterior Spinocerebellar | Unconscious proprioception | None (ipsilateral) | | Anterior Spinocerebellar | Unconscious proprioception | Spinal cord (double crossing) |
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The spinal cord tracts are categorized into (sensory/afferent) and descending (motor/efferent) pathways that allow the brain to communicate with the rest of the body. 1. Ascending Tracts (Sensory Pathways)
🧵 Just finished a PPT on the Ascending & Descending Tracts of the Spinal Cord .