Chapter 7: Strain Flashcards
Tissue that provides motion, maintains posture and generates heat. This is called:
Muscle tissue
Skeletal muscle: True or False
When it contracts it shortens, thereby drawing one end of itself closer to the other end and pulls the bone it is attached to, through the joints range of motion.
True
What are the four basic characteristics of muscle tissue?
Excitability
Contractility
Extensibility
Elasticity
Characteristic of muscle tissue where in muscle can shorten and thicken generating force to do work.
Contractility
Characteristic of muscle tissue wherein it responds to stimulus by producing electrical signals.
Excitability
Characteristic of muscle tissue where it can be stretched with out damaging the tissue.
Extensibility
Characteristic of muscle tissue where it is the ability to return to the original resting length
Elasticity
_____________ - has good blood supply and nerve supply which ensures the ability of prolonged muscle action and also good healing capabilities.
Skeletal muscle
Muscle tissue maintains new length after stretch is removed. This is called:
Plasticity
Connective tissue surrounds muscle tissue, providing protection and support. This connective tissue can extend beyond the fibers of the muscle belly, and also providing a strong attachment of a muscle to the bone’s periosteum.
Tendon
A condition of Overstretch or over contraction of the musculotendinous unit, leading to tearing or rupture.
Strain
What are the site that strain may occur?
- Belly of muscle
- Musculotendinous junction
- Body of tendon
- Tenoperiosteal junction
Degree of strain wherein there is a 0-20% fibres torn (minor stretch and tear).
Primary Degree
Percentage of fibres torn in second degree strain.
20-75%
Degree of strain wherein, there is a 75-100% tearing. Often requiring surgical correction.
Tertiary Degree
Duration of healing for tertiary degree of strain.
3-6 weeks, sometimes months to heal