Ascending And Descending Tracts Of Spinal Cord Ppt Jun 2026
Hemisection of the cord leads to loss of pain/temp on one side and motor/vibration loss on the other.
Originates in the vestibular nuclei. It receives equilibrium input from the inner ear and cerebellum to regulate balance by exciting extensor (antigravity) muscles.
| | Type | Function | Decussation | Lesion Deficit (Unilateral) | |---|---|---|---|---| | Dorsal column | Ascending | Fine touch, vibration, proprioception | Medulla (ipsilateral → contralateral) | Ipsilateral loss of tactile discrimination, vibration, proprioception | | Lateral spinothalamic | Ascending | Pain, temperature | Spinal cord (contralateral) | Contralateral loss pain/temp 1-2 segments below lesion | | Ventral spinothalamic | Ascending | Crude touch | Spinal cord (contralateral) | Contralateral crude touch loss | | Dorsal spinocerebellar | Ascending | Unconscious proprioception (lower limb) | Ipsilateral | Subtle ataxia | | Ventral spinocerebellar | Ascending | Unconscious proprioception (lower limb) | Double crossing | Subtle ataxia | | Lateral corticospinal | Descending | Skilled voluntary movements (distal) | Medulla (contralateral) | Ipsilateral UMN signs below lesion | | Anterior corticospinal | Descending | Axial (trunk) muscles | Spinal segmental | Mild trunk weakness (bilateral) | | Rubrospinal | Descending | Flexor facilitation (limited) | Midbrain (contralateral) | Unclear in humans | | Vestibulospinal | Descending | Extensor tone, posture | Ipsilateral | Postural/balance disturbance | | Reticulospinal | Descending | Modulation of reflexes, posture | Bilateral/spinal | Complex — spasticity release | | Tectospinal | Descending | Visual/auditory reflexes | Midbrain (contralateral) | Impaired orienting reflexes | | Olivospinal | Descending | Coordination (uncertain) | ? | Uncertain |
Carries pain and temperature sensations. ascending and descending tracts of spinal cord ppt
Spinocerebellar Tracts (Unconscious Proprioception) Content:
Decussate immediately at the anterior white commissure (within 1-2 spinal segments) →right arrow Ascend contralaterally to the thalamus. VPL nucleus of the thalamus →right arrow Primary somatosensory cortex. 3. The Spinocerebellar Tracts Location: Lateral funiculus.
The spinal cord serves as the primary information highway of the human body. It continuously channels sensory data up to the brain and transmits motor commands down to the periphery. For medical, nursing, and neuroscience students, mastering the pathways of the spinal cord is essential for diagnosing neurological deficits. Hemisection of the cord leads to loss of
Carry proprioceptive information to the cerebellum for coordination. 3. Descending Tracts (Motor Pathways)
: Split comparison chart (UMN vs LMN) with clinical photos or schematics of reflex hammer testing and Babinski response.
– Sources cited and open floor for audience questions. Part 2: Comprehensive Reference Article Introduction to Spinal Cord White Matter | | Type | Function | Decussation |
Spastic paralysis, hyperreflexia (increased reflexes), hypertonia (increased muscle tone), and a positive Babinski sign.
Broadly divided into: (corticospinal) and Extrapyramidal tracts (reticulospinal, vestibulospinal, rubrospinal, tectospinal, olivospinal).
End of Document. Suggested slide count: 19-22 slides. This material is designed for a 60-90 minute lecture or self-study module.
| Origin | Function | Effect on Muscles :---|:---|:---|:--- Vestibulospinal | Vestibular nuclei (in medulla/pons) | Maintains balance and posture, especially in response to head movement | Excites extensor (anti-gravity) muscles, inhibits flexors Rubrospinal | Red nucleus (midbrain) | Facilitates flexor muscle activity for limb movement | Excites flexors, inhibits extensors Reticulospinal | Reticular formation (brainstem) | Regulates voluntary movements, autonomic functions, and reflexes | Facilitates or inhibits flexor/extensor tone; controls postural muscles Tectospinal | Superior colliculus (midbrain) | Coordinates head and eye movements in response to visual stimuli | Controls neck muscles for orienting reflex
Great article thanks, if you fancy doing one that tells me how to turn ADF files into WHDLoad files where I can specify the kickstart version it would be awesome 🙂 🙂
I have some ADF files of some stuff I programmed years back and would love to get them to run on a real Amiga.
Creating WHDLoad files is definitely on my hit-list to check out. I’m just working on setting up the Amiga environment to do it. When I make some progress I’ll definitely do up an article about it. 🙂
Tried setting up Amiga Explorer without success. Everything checks out fine until I run setup. The Amiga takes the command “Type SER: to RAM:Setup”, setup seems to transfer, I hit Ctrl+C but when I hit “OK” on the PC side, I don’t see the “**BREAK” message. Quadruple checked my cable. Any suggestions?
Strange. Try opening up a new Shell and continue with step 11. Perhaps the setup has copied successfully and the original Shell is just not recognizing the copy has completed.
I tried that as well. I also checked RAMDisk to see if the file was there and it was not. I wonder if it has to do with how I jumpered the connectors. On the connections that lead from one to two contacts, I used a small bit of wire to bridge the two connectors. Should I have split the wire braids in half and run each half to the two connectors? Continuity checks out fine on those connections, 1&6 on DB9 to 20 on DB25 and 4 on DB9 to 6&8 on DB25. Would you know of an off the shelf cable that works with AE? If I can test it with a known working cable then I can move on to troubleshooting the serial port itself. Thanks for the reply Jason!
Using a small bit of wire is what I did on my cable too, so what you’ve described sounds like it should be okay.
From what it says on Cloanto’s web page for Amiga Explorer about the cable is an off the shelf cable should work if it supports full handshaking.
Would you be able to take a picture of the cable you made showing both ends? And send it to jason(at)everythingamiga.com?
I’m out of town at until the end of the week for work but when I get back I’ll do a bit of testing to see if I can offer some other ideas to confirm the cable is working okay. But if you can send me a picture or two that will at least get me started.
We’ll figure it out! 🙂
Alright Jason, I reworked the cable entirely and same issue. Until… I tried holding the Ctrl+C combo for ten seconds! **BREAK! Well, at least I was able to make the new cable more substantial and pretty. Thanks for the help!
That’s wonderful that it worked for you! Strange about having to hold down Ctrl+C. I’m glad you got it sorted.