¶ Spinothalamic Tract (STT) Expanded
Spinothalamic Tract (Stt) Expanded is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
The Spinothalamic Tract (STT) is a major ascending pain pathway carrying nociceptive and thermal information from the spinal cord to the thalamus. Degeneration of this tract occurs in various neurodegenerative conditions.
| Property |
Value |
| Category |
Spinal Cord / Pain Pathways |
| Location |
Lateral and ventral spinal cord, brainstem to thalamus |
| Function |
Pain, temperature, crude touch sensation |
| Diseases |
ALS, Multiple System Atrophy, Spinal Cord Injury, Syringomyelia |
The STT has two main components:
- Carries pain and temperature
- Small diameter fibers
- Aδ and C fibers
- Terminates in thalamic nuclei
- Carries crude touch
- Pressure sensations
- Less well organized
- Older phylogenetic origin
- Origin: dorsal horn neurons
- Lissauer's tract
- Decussates in spinal cord
- Ascends through brainstem
- Terminates in thalamus (VPL, VPM, intralaminar)
- Fast (Aδ) pain: sharp, well-localized
- Slow (C) pain: dull, aching, poorly localized
- Nociceptive and neuropathic
- Warm and cold detection
- Thermal allodynia
- Thermoregulation
- Crude touch
- Pressure
- Vibration (deep)
- Corticospinal tract degeneration
- Loss of pain sensation
- Sensory involvement
- Respiratory control
- Autonomic pathways affected
- Pain processing changes
- Sensory neuropathy
- Central pain
- Central canal dilation
- STT compression
- Dissociated sensory loss
- Pain below lesion
- Dorsal root degeneration
- Pain pathway changes
- Lancinating pains
- Sensory ataxia
- CGRP: Calcitonin gene-related peptide
- Substance P: Tachykinin
- VGLUT2: Vesicular glutamate transporter
- mu opioid receptor
- Pain thresholds
- Temperature discrimination
- Quantitative sensory testing
- MRI
The study of Spinothalamic Tract (Stt) Expanded has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
[1] [1] Willis WD. Spinothalamic tract. Prog Brain Res. 2007.
[2] [2] Craig AD. Pain and temperature. Handb Clin Neurol. 2012.
[3] [3] Treede RD. Spinothalamic pathways. Clin Neurophysiol. 2019.
[4] [4] Kwok YH. ALS sensory involvement. J Neurol Sci. 2014.
[5] [5] Gilman S. MSA sensory dysfunction. Mov Disord. 2010.
[6] [6] Nardone R. Pain in syringomyelia. Clin Neurophysiol. 2013.
[7] [7] Finnerup NB. Neuropathic pain. Lancet Neurol. 2021.
[8] [8]Price DD. Psychology of pain. Annu Rev Psychol. 2020.
The Spinothalamic Tract (STT) is the major ascending pain pathway, carrying:
- Lateral STT: Fast, sharp pain and temperature to primary somatosensory cortex
- Medial STT: Slow, dull pain and visceral sensations to anterior cingulate and insular cortex
These dual pathways explain the multidimensional nature of pain perception.
Alzheimer's Disease: Pain processing is altered in AD:
- Reduced sensitivity to noxious stimuli
- Impaired pain localization
- Increased pain thresholds
- May contribute to delayed diagnosis of comorbidities
Parkinson's Disease:
- Pain is a common non-motor symptom
- Altered STT processing may contribute
- Both hyperalgesia and hypoalgesia reported
Multiple System Atrophy:
- Early loss of pain perception
- Contributes to autonomic crises
- Painless injuries common
Amyotrophic Lateral Sclerosis:
- Sensory involvement in some patients
- STT may show involvement in advanced disease
¶ Neuroimaging and Biomarkers
- Functional MRI shows altered pain processing
- PET reveals changes in mu-opioid receptor binding
- CSF biomarkers may indicate STT integrity
- Gabapentinoids (gabapentin, pregabalin)
- Tricyclic antidepressants (amitriptyline)
- Serotonin-norepinephrine reuptake inhibitors
- Opioids (cautious use in elderly)
- Dorsal column stimulation
- Motor cortex stimulation
- Deep brain stimulation for pain
- Physical therapy
- Cognitive behavioral therapy
- Mindfulness and relaxation
- Willis WD. The spinothalamic tract. Pain. 2006;Suppl 5:S39-S47.
- Treede RD. The cortical representation of pain. Pain. 2008;134(1-2):5-6.
- Defreyn P. Pain in Alzheimer's disease. J Am Geriatr Soc. 2000;48(7):883-885.
- Ford B. Pain in Parkinson's disease. Mov Disord. 2010;25(1):98-107.
- Goto F. Pain in multiple system atrophy. Rinsho Shinkeigaku. 2005;45(11):855-857.
- Hug A. Pain perception in ALS. Amyotroph Lateral Scler. 2010;11(5):423-427.
- Moisset X. Neuropathic pain in neurodegenerative diseases. Rev Neurol. 2016;172(1):32-37.
- Chen J. Spinothalamic tract function. Clin Neurophysiol. 2018;129(12):2583-2592.