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Spinal Cord Tracts
Tracts of the Spinal Cord
| Question | Answer |
|---|---|
| Where does sensory info enter from the arms | C4-C5 |
| Where does sensory info enter from the legs | L2-L4 |
| What is the sensory route in the CNS | Receptor - Sensory Neuron - Spinal Cord - Thalamus - Parietal Cortex |
| What does the Dorsal Column control/show | 2 pt discrimination, deep pressure, vibration, conscious muscle sense |
| Where does the Dorsal Column cross | Medulla |
| What does the LSTT control/show | Pain and Temperature |
| Where does the LSTT cross | Spinal Cord at entry |
| Where is the LSTT in the Spinal Cord | Lateral anterior close to gray matter |
| What does the ASTT control/show | Light touch, light pressure |
| Where does the ASTT cross | Spinal Cord at Entry |
| Where is the Dorsal Colum | Dorsal side medially |
| Where is the ASTT | Ventral side medially |
| What does the Posterior Spinocerebellar tract control/show | Unconscious muscle and joint sense |
| Where does the PSCT cross | It doesn't |
| What does the ASCT control/show | Unconsious muscle and joint sense |
| Where does the ASCT cross | Spinal cord at entry |
| Where is the PSCT | Lateral dorsal at edge of vertebrae |
| Where is the ASCT | Lateral Anterior at edge of vertebrae |
| What does the LCST control/do | Moves skeletal muscles (arms/legs) |
| Where does the LCST cross | Medulla |
| What is the pattern for the Motor Pathway | Primary Motor Cortex- Spinal Cord - Alpha Motor Neuron |
| What does the ACST control/do | Moves skeletal muscles (axial) |
| Where does the ACST cross | Spinal Cord at site of innervation |
| What does extraspinal tract control/do | Stimulate postural muscles, key role in balance |
| Role of extraspinal tract | Controls Gamma Motor Neurons |