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For more cadaveric images and question banks, visit https://bootcamp.com/med-school The spinothalamic system carries pain, temperature, and crude touch sensations. In this lesson, we explain how these signals travel through the anterior and lateral spinothalamic tracts, where they decussate in the spinal cord, and how to localize lesions based on deficits. Learn why contralateral pain/temperature loss points to spinothalamic injury, while ipsilateral vibration/position loss suggests dorsal column involvement. We also cover somatotopy and clinical cases like intramedullary vs extramedullary tumors. What you’ll learn: 1. Anterior spinothalamic tract – crude touch sensation 2. Lateral spinothalamic tract – pain and temperature pathways 3. Three-neuron chain – from dorsal root ganglion to thalamus to sensory cortex 4. Decussation point – spinal cord level crossing vs dorsal column system 5. Lesion patterns – ipsilateral vs contralateral deficits, Brown-Séquard comparison 6. Somatotopic organization – cervical medial, sacral lateral arrangement 7. Clinical correlation – sensory loss in spinal cord lesions & tumor progression ⏱️Timestamps 0:00 – Intro 0:22 – Spinothalamic pathways overview (anterolateral system) 0:43 – Anterior spinothalamic tract: crude touch sensation 1:10 – Lateral spinothalamic tract: pain & temperature sensation 1:37 – Three-neuron chain explained (1st, 2nd, 3rd order neurons) 2:11 – Role of dorsal root ganglion & dorsal horn 2:42 – Decussation of spinothalamic pathways (spinal level) 3:32 – Contrast with dorsal column decussation in brainstem 4:03 – Lesion example: contralateral deficits after crossing 4:24 – Lesion example: ipsilateral deficits before crossing 4:47 – Combined lesion: spinothalamic vs dorsal column deficits 5:42 – Ipsilateral vs contralateral sensory loss explained 6:11 – Summary of key decussation points 7:12 – Somatotopic organization of lateral spinothalamic tract 7:40 – Cervical medial, sacral lateral arrangement 8:41 – Intramedullary lesion pattern (inside → out compression) 9:07 – Extramedullary lesion pattern (outside → in compression) 9:31 – Clinical correlation: progression of sensory loss in tumors 9:55 – Wrap-up & key takeaways This lesson is especially helpful for medical students, or anyone reviewing for anatomy exams. If it helps you out, give it a like, leave your questions in the comments, and subscribe for more Bootcamp videos. TikTok: / medschoolbootcamp INSTAGRAM: / medschoolbootcamp #medschoolbootcamp #medicine #Medical #MedStudent #MedicalStudent #MedSchool #MedicalSchool #Doctor #Resident #Hospital #MD #Med #Anatomy #Science #Whitecoat #WhiteCoatCeremony #MS1 #ms2 _____________________________________________________________ spinothalamic tract, anterior spinothalamic, lateral spinothalamic, anterior lateral system, crude touch pathway, pain and temperature pathway, spinothalamic decussation, contralateral sensory loss, spinal cord lesions, somatotopic organization spinothalamic, spinal cord tracts, neuroanatomy made easy, sensory pathways explained, med school neuro review, high-yield neurology, dorsal column vs spinothalamic, spinal cord neuro exam, pain and temperature tracts