Spinal Mechanics

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DVD: Spinal Mechanics and Bony Locking For Health Professionals

By John Bayliss - Narrated by Lindsey Gleeson - and filmed by Peter O' Toole

This film is aimed at professionals and students who have an interest in how the sacroiliac and spinal joints articulate and lock. It is assumed that the viewer has a working knowledge of anatomy and physiology.  Be aware that the film is purely about spinal mechanics and bony locking (subluxation's).  It is not about technique or clinical application.



The DVD is divided into 11 chapters I can be easily accessed through the easy on-screen menu.


Chapter 1)  Introduction. This chapter provides an overview of the DVD and introduces the two main patient types; L3-right right and L3-left-right and illustrates the postural changes that these patients present with.


Chapter 2)  The physiology of the sacroiliac joints. This chapter illustrates the shapes of the facets of the sacrum and Ilium and shows how the sacroiliac joints relate to the acetabulum and lumbar.  It goes on to illustrate the function of the pelvis during normal ambulation, rotation and side-bending movements.


Chapter 3)  The physiology of the lumbar vertebrae. This chapter illustrates the shapes of the facets of the individual lumbar vertebrae and shows how the lumbar vertebrae articulate with each other during normal physiological rotation and side-bending during every day, forward and backward leaning.


Chapter 4) The physiology of walking. This chapter focuses on the forces that are put into play during the normal physiological walking action and how all the pelvic joints articulate and have a role with each other and and how they interrelate and work in harmony with the articulations of the lumbar joints.


Chapter 5) The physiology of the thoracic joints. This chapter details the different shapes of some of the main individual vertebral facets and how each joint articulates with its adjoining vertebral facets during the normal movement of side-bending and rotation in thoracic flexion. It explains why it is not possible to rotate and side bent to the same side in thoracic extension.  It demonstrates   how the thoracic vertebrae move to compensate for the ribs which need to be kept  in parallel at all times for unrestricted breathing.


Chapter 6) The physiology of the cervical joints. This chapter details of different shapes of the cervical vertebrae facets and how each joint articulate with for those adjoining  in normal physiology. It explains how the joints C2 to C7 rotate and side-bent to the same side and why the joints are not capable of side-bending and rotating to opposite sides.   The articulation of C1 and the occipital bone is also covered.


Chapter 7) Flexion subluxation's in the lower back.  This chapter shows how the incorrect use of forward bending together with incorrect side-shift causes the lumbar and sacroiliac joints to subluxate in flexion.


Chapter 8) Extension subluxation's in the lower back. This chapter shows how incorrect use of backward bending together with incorrect side-shift causes the lumbar and sacroiliac joints to subarctic in extension.


Chapter 9) Consequences of extension subluxation's in the lower back.   This chapter continues on from the previous chapter and explains the mechanical compensations that follow on when the musculoskeletal frame attempts to adjust and compensate to the subluxations in the lumbar and sacroiliac joints on the opposite side.


Chapter 10) Subluxation's in the thoracic vertebrae. This chapter shows how subluxation's are created in the thoracic vertebrae and is illustrated with clear diagrams the help of your to understand what happens when side-shift changes take place below.  It compares the findings to the ‘real world’ subluxation patterns patient present with.


Chapter 11) Subluxation's in the cervical vertebrae. This chapter shows how subluxation's are created in the cervical vertebrae and is illustrated with clear diagrams that help the viewer understand what happens when side-shift/bending changes take place.  It compares the findings to the ‘real world’ subluxation patterns patients present with.