EXSS2018 Lecture Notes - Lecture 8: Osteoclast, Proprioception, Bone Density

• School: University of Sydney
• Department: Exercise and Sport Science
• Course: EXSS2018
• Professor: Peter Sinclair

Document Summary

Pt stiffer, higher maximum stress, more fibres running length ways. Deformation (constant load: creep is particular evident in articular cartilage as fluid exits the cartilage (intervertebral discs, upon applied force, the fluid deforms/compresses a lot. Time: creep is present in all soft tissues (seen with stretching - as you hold a stretch you can go further over a longer period of time) Adaptation of tissues: living material is adaptable; strength will increase in response to appropriate loading and decrease with insufficient loading. Lower stiffness, further elongation with immobilization (no exercise) Stretch will change depending on type of material: wolff"s law: bone is laid down where is it needed and reabsorbed where it is not needed. What triggers adaptation: strain causes adaptation, osteocytes detect if there is strain (of the bone) in lacunae; detect if moving and sends signals to other cells (osteoblasts/osteoclasts)