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A&P of Posture: The Descending Tracts

A&P of Posture: The Descending Tracts. Dynamic Equilibrium. Sensory Organization. Motor Coordination. Choice of Body Movement. Determination of Body Position. Compare, Select & Combine Senses. Select & Adjust Muscle Contractile Patterns. Ankle Muscles. Thigh Muscles. Trunk

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A&P of Posture: The Descending Tracts

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  1. A&P of Posture: The Descending Tracts

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

  3. LIMITS OFSTABILITY The furthestdistancein any directiona person can leanaway frommidline(vertical) without alteringthe originalbase-of-support(by stepping, reaching, or falling)

  4. 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

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