VERTEBRAL CURVATURE Flashcards
has four curves that arch anteriorly and posteriorly from the midcoronal plane of the body.
The vertebral column
When viewed posteriorly, the normal lumbar curve can correctly be referred to as
“concave posteriorly.”
Whether the curve is described as
“convex anteriorly” or “concave posteriorly,”
The cervical and lumbar curves, which are convex anteriorly, are called
lordotic curves
The thoracic and pelvic curves are concave anteriorly and are called
kyphotic curves
• Convex anteriorly & Concave posteriorly
• Known as lordotic curves.
Cervical & Lumbar curves:
• Concave anteriorly & Convex posteriorly
• Known as kyphotic curves
Thoracic & Pelvic curves
Convex anteriorly & concave posteriorly
Secondary/compensatory curve: develop after birth
Cervical: when baby starts holding the head
Lumbar: when baby learns to walk
Cervical and Lumbar Curvature
Convex posterior & concave anteriorly
Primary curve: present at birth
Thoracic & Pelvic Curvature
Abnormal Curvatures
Exaggerated lumbar curvature
“Swayback”
Increase anterior convexity or posterior concavity
Lordosis
Exaggerated thoracic curvature
Humpback or hunchback
Increase anterior concavity or posterior convexity
KYPHOSIS
Lateral curvature
S-shaped
This condition also causes the vertebrae to rotate toward the concavity.
The vertebral column develops a second or compensatory curve in the opposite direction to keep the head centered over the feet.
SCOLIOSIS
The principle of proper body alignment, movement and balance
BODY MECHANISM
the portion of the body in contact with the floor.
A wider BOS provides greater stability.
Standing with feet 4-8 inches apart increases balance and reduces the risk of falling.
Example: Standing with feet shoulder-width apart before lifting an object.
Base of Support (BOS)
the point at which the body’s weight is evenly distributed and balanced.
- Usually located in the mid portion of the pelvis or lower abdomen, depending on body build
Any object your hold adds to the weight on the base of support affecting the location of your center of gravity
Center of Gravity(COG)
imaginary vertical line passing through the center of gravity
falls through the COG and within the BOS
When the line of gravity is aligned properly, the body is in a stable and balanced position.
Line of Gravity (LOG)
BODY MECHANICS
Reasons for use:
- Muscles work best when used correctly
- Makes lifting, pulling, and pushing easier
3.Prevents unnecessary fatigue & strain & saves energy - Prevents injury to self or others
RULES OF BODY MECHANICS
- Provide a broad base of support
- Work at a comfortable height.
- When lifting, bend at the hips & knees and keep your back straight.
- Keep your load well balanced and close to your body
- Roll or push a heavy object. Avoid pulling or lifting.
