1. A&P of Posture: The Descending Tracts

2. Muscle Contractile Patterns
Dynamic Equilibrium
Sensory Organization
Motor Coordination
Determination
of Body Position
Choice of
Body Movement
Compare, Select
& Combine Senses
Select & Adjust
Muscle Contractile Patterns
Visual
System
Vestibular
System
Somato-
Sensation
Ankle
Muscles
Thigh
Muscles
Trunk
Muscles
Environmental
Interaction
Generation of
Body Movement

3. LIMITS OF STABILITY
The furthest distance in any direction a person can lean away from midline (vertical) without altering the original base-of-support (by stepping, reaching, or falling)

6. Vestibulo-Spinal Tracts
From the Vestibular nuclei at the level of the pontomedullary junction
To the internuncial and lower motor neurons of the postural muscles
Medial VST
Lateral VST
Serves reflexive and automatic balance/posture