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.

Was this article helpful?

0 0
Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.

Get My Free Ebook

Post a comment