Lecture notes HUB2019F - Musculoskeletal

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Musculoskeletal
Skeletal System
Bone: is a connective tissue
Musculoskeletal System Function:

Protect and support soft tissues

Anchor muscles, tendons, and ligaments

Rigid levers that operate muscles

Locomotion

Physiological Function

Critical for red-blood cell production (marrow cavity)

Fat storage

Calcium reserve and release
(metabolism)




Bone Properties
Living tissue, responds to external stress-deposits where needed absorbs where
it is not

Strength (mineral)

Tensile – High – stretch

Compression – High – top to bottom pressure

Torsion – Low – twisting


Musculoskeletal 1

, Elasticity (protein) – slightly higher than wood


Bone
Shaped and re-shaped by the cells that reside within it, conforms to mechanical
needs.

Morphology (size and shape) altered in life.




Anatomical Terminology
Vocabulary used to describe the human body

Standard anatomical position of the body = supine

Crania = skull

Postcrania = below the skull




Bone & Musculoskeletal system
Muscular movement

Origin: stable site during contraction

Insertion: site moved during contraction

Actions:

1. Flexion/Extension

2. Abduction/Adduction

3. Pronation/supination

4. Rotation




Motions
Flexion/Extension

Check pdf




Musculoskeletal 2