Question | Answer |
What are Spinal Tracts? | vertical bundles (fasciculi) of Functionally Similar Nerves in WHITE matter |
What are Ascending Tracts? | SENSORY pathways to various centers in the brain |
Name the Ascending Tract(s) located Dorsally. | Fasciculus Gracilis, Fasciculus Cuneatus, Spinocerebellar |
At which point do Dorsal Ascending tracts "crossover"? | at the Medulla |
What is Decussation? | the point at which tracts crossover |
What is the Fasciculus Gracilis responsible for? | Light Touch + Muscle Position Sense in LOWER body |
What does the Fasciculus Cuneatus control? | Light Touch + Muscle Position Sense in UPPER body |
What is the Spinocerebellar spinal tract responsible for? | Subconscious Muscles Sense to the Cerebellum --> Posture Control |
Damage to a RIGHT Dorsal Ascending tract would result in what and why? | SENSORY loss to the RIGHT side of the body - crossover at the Medulla |
Which Ascending tract(s) crossover at the level of ENTRY? | Lateral and Anterior |
The Lateral Ascending Spinothalamic spinal tract is responsible for which Sensations? | Pain and Temperature |
The Anterior Ascending Spinothalamic spinal tract is responsible for which Sensations? | CRUDE Touch and Pressure |
Damage to the RIGHT Lateral or Anterior Ascending spinal tract would result in what and why? | SENSORY loss on the LEFT side of the body - Crossover at level of ENTRY |
How many categories of Ascending tracts are there? | 3 - Dorsal, Lateral, Anterior |
What are Descending Spinal Tracts? | MOTOR pathways FROM the Cerebral Cortex and/or Cerebellum |
What are the types of Descending tracts? | Pyramidal (crossover AT Medulla forming Pyramids) and Extrapyramidal (crossover ABOVE Medulla) |
Name a Pyramidal Descending spinal tract and its function. | Corticospinal - FINE voluntary movement |
What does the Extrapyramidal Spinal Tract control? | INVOLUNTARY influence on Coordination and Balance |