Stresses and Forces Flashcards
What is Shear Stress?
When tissued are stretched in opposite directions, in different planes
What are the four Mechanical Stresses?
Compression
Torsional
Tensile
Shearing
What stress is this an example of?
Shear
What stress is this an example of?
Compression
What pathologies can occur from Intermittent Compression Stress?
Corns
Callus
What are some examples of Physiological stress?
Burn
Cold
Fungal Infection
Bacterial Infection
Viral Infection
Aging
Systemic Disorder
What are the two different types of Shear Stress?
Superficial
Deep
What are the two types of Compression Stress?
Constant
Intermittent
What is Tensile Stress?
When the forces are being pulled away from one another
What are the differences between Mechanical and Physiological stresses?
Mechanical stresses concern force being applied to the weight bearing foot
What type of Stress is this an example of?
Tensile
What stress is this an example of?
Torsional
Define Stresses
What occurs to the skin/tissu when forces are applied
What pathologies can occur from Constant Compression Stress?
Tissue necrosis
What pathologies can arise from Superficial Shear Stress?
Blistering
What pathologies can occur from Deep Shear Stress?
Bursas/Bursitis
‘Glassicallus’
What is Compressional Stress?
When the forces are being pulled together
What Pathologies occur as a result of tensile stress?
Fissures - cracks in the skin - occurs often interdigitally, and around the calcaneous
What is Torsional Stress?
An amalgamation of shearing, tensile and compressional stress, it can occur when the foot is used in a pivotal action
What pathologies can occur from Torsional Stress, and at what common areas?
Callus
Common areas:
- Plantar aspect of 1st mtpj
- Plantar calcaneal area
- Plantar aspect of hallux
