Unit 3 Flashcards
What two components make up “good” body mechanics?
- Maintaining proper body alignment, posture throughout task.
- Applying appropriate biophysical principles.
What are the 5 main biophysical principles important in body mechanics?
- Low COG (center of gravity)
- Wide BOS (base of support)
- Short lever arm
- Momentum
- Straight plans - no twisting
What does good standing posture look like? Describe where the LOG (Line Of Gravity) should ideally fall
Double “s” curve from neck to sacrum, considered neutral spine.
Goal is for the line of gravity (LOG) to pass through most pf the joint axes
90/90/90
When the spine is double “s” curve from neck to sacrum, what is this called?
The neutral spine
List the 5 key principles of lifting - using good body mechanics
- Key load close
- Create an appropriate base & support
- Use Isometric muscle contracting of the core.
- Lift with legs
- Do not twist
How are body mechanics & MSI related?
You must have & practice good body mechanics to avoid an MSI
What is a MS?
Musculoskeletal Injury
What are the 4 symptoms of a MSI?
- Pain
- Decreased ROM + strength
- Heat, redness + swelling.
- Numbness + tingling.
In which area of the body are MSI’s most common
Back
What are 5 risk factors for developing an MSI
- Excessive force
- Awkward position
- Prolonged duration
- Repetition
- Poor work environment
What are the 4 anatomical structures that make up our “core”?
- Transversus abdominis
- Pelvic floor
- Diaphragm
- Deep lumbar paraspinals
What 2 muscle groups are often shortened from our daily activities?
- Pectoral muscles
2. Hamstrings
Most significant cause of injury to health care workers
Overexertion
Convexity of spinal column
Kyphosis
Maintained when the line of gravity falls close to the base of support
Balance
The coordinated efforts of the musculoskeletal & nervous systems to maintain proper balance, posture + alignment
Body Mechanics
“Correct” spinal alignment which minimizes the muscle strain in the neck & back
Neutral spine
Feet placed at least shoulder width apart
Wide base of support
The resistance that one surface or object encounters when moving over another
Friction
“Side to side, front to back”
Weight shift
“Rock 1,2,3”
Momentum
The force that pulls objects towards the earth’s centre
Gravity
Centre of mass of an object, around which the object is in balance
Centre of gravity
A branch of therapy focusing on posture & alignment
Ergonomics
Concavity of the spinal column
Lordosis
Ergonomics
A branch of therapy that focuses on posture & alignment
