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Dynamic Equilibrium and Postural Control: Understanding Body Movement and Position

Explore the intricate interplay of sensory organization, motor coordination, and the determination of body position in the human body. Learn about the A&P of posture, the descending tracts, and how the visual and vestibular systems contribute to sensory integration for optimal motor control. Discover the role of ankle, thigh, and trunk muscles in maintaining stability and generating movement, and how the somatosensory system influences body positioning. Dive into the limits of stability and the vestibulo-spinal tracts' involvement in reflexive balance and posture adjustments.

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Dynamic Equilibrium and Postural Control: Understanding Body Movement and Position

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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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