Ascending tracts

Descending tracts

Involved with voluntary motor function, muscle tone, relfexes, and equilibrium (motor)
Main efferent tracts
Pyrmidal motor types
- Corticospinal tract (anterior)
  - Motor
  - Ipsilateral skilled movements
- Corticospinal tract (lateral)
  - Motor
  - Contralateral fine movements
- Damage to this may cause positive Babinski sign, loss of fine movement, and voluntary movement.
Extrapyramidal motor types
- Reticulospinal tract
  - Motor
  - Facilitation/inhibition of voluntary and reflex activity
- Rubrospinal tract
  - Motor
  - Gross posture tone
  - Facilitating flexor muscles
  - Inhibiting extensor muscles
- Tectospinal tract
  - Motor
  - Contralateral postural muscle tone
- Vestibulospinal tract
  - Motor
  - Ispsilateral posture adjustments
- Damage to this may cause in paralysis, hypertonicity, exaggerated deep tendon reflex.

Motor development (Birth to 13 years)