Last effort Flashcards
What type of joint is the humeroradial joint?
Elbow-hinge joint
What is the primary movement allowed by the proximal radio-ulnar joint?
Supination and pronation
What type of joint is the glenohumeral joint?
Ball and socket joint
What movements are allowed by the glenohumeral joint?
- Flexion
- Extension
- Abduction
- Adduction
- Internal rotation
- External rotation
- Horizontal adduction
- Horizontal abduction
What type of joint is the acromioclavicular joint?
Planar joint
What are the primary movements allowed by the acromioclavicular joint?
Upward and downward rotation, internal rotation (protraction) and external rotation (retraction), anterior tilting (elevation), posterior tilting (depression)
What type of joint is the sternoclavicular joint?
Saddle joint
What are the primary movements allowed by the sternoclavicular joint?
- Protraction
- Retraction
- Elevation
- Depression
Movements of the scapulothoracic joint?
Elevation, depression, protraction, retraction, upward and downward rotation
What type of joint is the radiocarpal joint?
Ellipsoid joint
What are the movements allowed by the radiocarpal joint?
Flexion, extension, radial deviation, ulnar deviation
What type of joint is the 1st CMC joint?
Saddle joint
What are the movements allowed by the 1st CMC joint?
Abduction, adduction, flexion, extension
What type of joint is the femur on pelvis?
Ball and socket joint
What are the primary movements allowed by the tibiofemoral joint?
Flexion, extension, slight internal rotation and external rotation
What type of joint is the talocrural joint?
Convex on concave joint
What are the primary movements allowed by the talocrural joint?
Plantarflexion, dorsiflexion, eversion, inversion
What type of movements occur at the subtalar joint?
Pronation and supination for non-weight-bearing activities
What type of joints are present in the C-spine and lumbar spine?
Planar joints
What are the primary movements allowed by the C-spine and lumbar spine?
Flexion, extension, rotation
What is the axis of rotation typically located through in joint biomechanics?
Through the convex member of the joint
How many degrees of freedom does the shoulder joint have?
Three degrees of freedom
How many degrees of freedom does the wrist joint have?
Two degrees of freedom
What are the three fundamental movements between joint surfaces?
Roll, slide, and spin
In convex on concave joint movements, how do the roll and slide occur?
In opposite directions
In concave on convex joint movements, how do the roll and slide occur?
In the same direction
What is the closed packed position in joint biomechanics?
The position of maximum congruency of the joint
What is the loose packed position in joint biomechanics?
Any other position when the joint is not in the closed packed position
What does the stress-strain curve represent?
The relationship between stress and strain in materials
What is the elastic region in the stress-strain curve?
The region where the material returns to its original shape after deformation
What is the plastic region in the stress-strain curve?
The region where permanent deformation occurs
What is the yield point in the stress-strain curve?
The point where the material begins to deform permanently
What is the ultimate failure point in the stress-strain curve?
The point where the material fails or breaks
What is the creep phenomenon?
The tendency of a material to slowly deform permanently under the influence of mechanical stresses
What are internal forces in biomechanics?
Forces generated by muscles
What are external forces in biomechanics?
Forces acting on the body from the environment, such as gravity
What is the moment arm in biomechanics?
The perpendicular distance between the axis of rotation and the line of force
What produces torque or moment in biomechanics?
The product of a force and its moment arm
What are the three ways a muscle produces force?
Isometric, concentric, and eccentric contractions
What is isometric contraction?
Producing force without changing the muscle length
What is concentric contraction?
Producing force as the muscle shortens
What is eccentric contraction?
Producing force as the muscle lengthens
What is kinematics?
The study of motion without considering the forces that cause the motion
What is kinetics?
The study of the effects of forces on the motion of a body
What is Wolff’s Law?
The concept that bone in a healthy person will adapt to the loads under which it is placed
What are the functions of the skeleton?
Leverage, support, protection, storage, blood-cell formation
What are osteocytes?
Bone cells
What are osteoblasts?
Cells that create bone
What are osteoclasts?
Cells that resorb bone
What are the two types of bone tissue?
Cortical and cancellous
What is cortical bone?
Compact, very dense outer layer of bone
What is cancellous bone?
Spongy, very porous inner layer of bone
What are the different types of bone?
Long, short, flat, irregular, sesamoid
What is Wolff’s Law in relation to bone?
Resorption occurs in response to decreased stress, deposition occurs in response to increased stress
What are the types of loading in bone biomechanics?
Compression, tension, shear, bending, torsional