Final Review Flashcards
Name the three main sensory systems that pertain to balance and posture.
- Vestibular
- Vision
- Somatosensory
What is stability?
The ability to maintain your CoM within your BoS
What is considered normal for neutral pelvis AP rotation?
~15 degrees of anterior tilt is considered normal.
Name the muscles that are tight and weak in a person with a Flat back posture.
Tight hamstrings
weak rectus femoris and iliopsoas
Name the muscles that are tight and weak in a person with a sway back posture.
Tight hamstrings
Weak rectus femoris, external obliques, and hip flexors.
Tend to be kyphotic in the Thoracic spine and increased lordosis in the c-spine
Name the muscles that are tight and weak in a person with a kyphosis - lordosis posture.
Weak hamstrings, Abs, and back extensors
Tight Quads, neck extensors, hip flexors
Name the spine levels that lines up with the spine of the scapula, the iliac crests, and the PSIS.
Spine of the scapula = T3
Iliac crests = L4 or L5
PSIS = S2
What is considered okay for leg length discrepancy?
1 to 1.5 cm
What is scoliosis in the spine?
It is a lateral shift of the spine in the frontal plane
Which direction from the midline do Varus and Valgus alignment go?
Varus = away from the midline Valgus = toward the midline
What is a windswept deformity?
Genu varum in one knee and Genu valgum in the other
If the angle of the head of the femur and the shaft of the femur is too small, what kind of alignment will we see in the knee?
Knee valgus
If the angle of the head of the femur and the shaft of the femur is too big, what kind of alignment will we see in the knee?
Knee varus
A person that has anteverted hips will have what alignment in the feet?
Pigeon toed (internal rotation)
A person that has retroverted hips will have what alignment in the feet?
Duck footed (outward rotation)
What movement does thoracic kyphosis primarily limit? why?
It limits flexion and possibly abduction at the shoulder due the scapula being anteriorly tilted.
Why is it so hard for people to not hyperextend their knees in standing?
Line of gravity is anterior tot the axis of rotation
Postural adjustments above and below the knee can cause hyperextension. (e.g. tight PFs, anterior pelvic tilt)
What movements happen in the sagittal plane?
Flexion and extension
What movements happen in the frontal plane?
Abduction and adduction
What movements happen in the transverse plane?
Rotation
What are the two components of Kinematics?
Rotation and translation
What are arthrokinematics?
Describes motion that occurs between the articular surfaces of the joint
What three movements are associated with arthrokinematics?
Roll
Slide/glide
Spin
Name the three laws developed by Newton.
Law of inertia
Law of acceleration
Law of Action-reaction
Describe the law of inertia
A body at rest or at a constant linear/angular velocity except when compelled by a force to change its state
Describe the law of acceleration
Linear acceleration of a body is directly proportional to the force causing it.
Law of Action-Reaction
For every action there is a opposite and equal reaction
Name the 5 types of forces
Shear Compression Tension Torsion Combined loading
How does the tension change in a ligament that is continued to be lengthened following recruitment of all of its fibers?
Tension drastically increases
How does creep affect ligaments?
It will cause the to lengthen over a period of time making them less effective.
Give an example of hysteresis of a ligament.
Marathon runner’s ACL length at the beginning of a run vs. length at the end of the marathon. It will have gotten longer due to sustained load and the ligament loses its tension.
What is it called when the physical properties of the stress strain curve change as a function of time?
Visco-elastic properties
What are the three subsystems of Panjabi’s Model
Neural subsystem
Passive Osteoligamentous subsytem
Active Muscular subsystem
What is the role of the passive osteoligamentous subsystem?
Contributes the most to stability
Act as dynamic, active mechanoreceptors
What is the role of the active muscular subsystem?
Force generation
Mechanoreceptors
What is the role of the neural control subsystem?
Receives information
Determines specific requirements for joint function
Causes the active muscular subsystem to achieve the desired outcome
What are the contraindications of AROM or PROM?
If motion might disrupt healing
If a fracture or dislocation is suspected
If ossification in the muscle is suspected
A lesion of which nerve could cause winging of the scapula?
Long Thoracic Nerve
How does the rotator cuff muscles help prevent impingement?
by pulling the humeral and down and in during abduction
Define a discrete motor skill.
A movement with an identifiable beginning and end e.g. a pitch
Define a serial motor skill.
Several discrete movements together in a series e.g. playing piano
Define a continuous motor skill
Walking, running, or swimming
What is the goal of balance?
Maintain appropriate orientation of the body relative to the environment
Which joint to people tend to move at during strong perturbations?
The hip