Fryettes Laws

First Law: Neutral Position-Sidebending-Rotation

Fryette called the neutral position "easy-flexion." This refers to the range of motion in the sagittal plane between the points where facet contact occurs in flexion and extension.

When the spinal column makes a sideways bend from the neutral position, the vertebrae rotate into the newly formed convexity (Fig. 3.2). This affects several vertebrae.

Second Law: Flexion(or Extension)-Rotation-Side-bending

When the spinal column makes a sideways bend from a flexion or extension position in which the facets are in contact, the vertebrae are forced to make a rotation to the same side (Fig. 3.3). This is due to the orientation of thejoint plane. This movement can be executed by a group of vertebrae, but also in isolation.

These are physiological movements of the spinal column that we execute on a daily basis:

• In every step, the LSC and TSC make neutral posi-tion-sidebending-rotation (NSR) movements and the CSC makes extension-rotation-sidebending (ERS) movements.

• Every time we bend sideways out of a stoop, at least one vertebra makes a flexion-rotation-sidebending (FRS) movement.

Post Lumbar Positioning
Fig. 3.2 Behavior of the lumbar vertebrae during side-bending from the neutral position (NSR). Adaptive lumbar curvature.
Fryette Laws
Fig. 3.3 Facet position in flexion and extension.
Midsection Meltdown

Midsection Meltdown

Attention, Want 6 Pack Abs? Then Read Every Word On This Page... Revealed! Follow A Proven Plan To Unveil Your Six Pack Abs Today. Download today To Discover The Simple But Sure Way To 6 Pack Abs. This powerful tool will provide you with everything you need to finally achieve your dream of shedding the tummy fat for good and revealing your six pack abs. You can make weight loss promises to yourself all day and night, but actually sticking to your goals is the hard part.

Get My Free Ebook

Post a comment