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44 Cards in this Set
- Front
- Back
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Define abductor:
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a seating component used to keep the legs in a neutral abducted position - also referred to as pommel or medial knee support
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Define compression
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occurs when forces act toward each other (push together)
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Define dampening
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ability of a material to soften upon impact.
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Define density
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ratio of weight of a material to its volume
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Define envelopment
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degree to which the person sinks into a seating cushion and the degree to which the cushion surrounds the buttocks.
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Define equilibrium
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the situation in which the force generated by one object is equal in magnitude and opposite in direction to a force from another object.
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Define fixed deformity
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a permant change in the bones, muscles, capsular ligaments, or tendons that restricts the normal range of motion of the particular joint and affects the skeletal alignment of the other joints.
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Define flexible deformity
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a deformity that happens due to a increase tone and muscle tightness causing the person to assume certain postures;
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Define force
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anything that acts on a body to change its rate of acceleration or alter its momentum
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Based on the needs of consumers, what are the three areas of seating that can be addressed by AT
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1. Seating for postural control and deformity management
2. Seating for pressure management 3. Seating for comfort and postural accommodation |
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What are the 3 types of force, and why are they relevant to seating and positioning?
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1. Tension forces
2. Compression forces 3. Shearing forces - |
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What is the difference between force and pressure?
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??
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Distinguish among tension, compression, and shear.
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Tension forces act in the line line but away from each other. pulling apart
Compression occurs when forces act toward each other. pushing together Shearing occurs when forces are parallel to each other (sliding across the surface) |
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What is the primary purpose of seating devices
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to maximize a person's ability to function in activities across all performance areas (self-care, work, school, play or leisure)
they are general-purpose extrinsic enablers |
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Postural control and deformity management is a typical need of individuals with
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cerebral palsy.
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What are the physical characteristics of a person with cerebral palsy?
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abnormal muscle tone
muscle weakness, primitive reflexes or uncoordinated movements that impair their ability to stay upright in a wheelchair. |
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Name other disabilites that need with seating needs for postural control
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M.S
MD People in early stages of rehabilitation (i.e. individuals with TBI |
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Population served by the category of seating interventions for pressure management is individuals with
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a spinal cord injury. partial or complete paralysis
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What are the roles of each team member in delivering seating services
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Occupational and physical therapist provide expertise in neuromoter function, human development and knowledge of disabilities
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Lordosis
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an abnormal forward curvature of the spine in the lumbar region, resulting in a swaybacked posture.
(bending back) |
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Scolisis
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an abnormal lateral curvature of the spine.
curved, crooked, S-Curved |
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Kyphosis
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an abnormal, convex curvature of the spine, with a resultant bulge at the upper back.
hunchback - kyph - humpback |
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Kyphotic
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an abnormal, convex curvature of the spine, with a resultant bulge at the upper back.
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Windswepted hip deformity
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when one hip is adducted and the other hip is abducted
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posterior
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coming after or behind
The legion was on the posterior area of the arm |
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anterior
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coming before or at the front
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proximal
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situated toward the point of origin or attachment, as of a limb or bone.
prox - next to, near |
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distal
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situated away from the point of origin or attachment, as of a limb or bone
dist - distance |
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elongated
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long and thin
extend, lengthen |
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asymmetrical
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not identical on both sides of a central line; unsymmetrical; lacking symmetry:
most faces are asymmetrical |
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symmetry
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balance, the correspondence in style and form, and arrangement of parts
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sacral region
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a bone resulting from the fusion of two or more vertebrae between the lumbar and the coccygeal regions, in humans being composed usually of five fused vertebrae and forming the posterior wall of the pelvis.
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Pressure
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Covers a small area
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Force
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applied over a surface area
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asymmetrical
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not identical on both sides of a central line; unsymmetrical; lacking symmetry:
most faces are asymmetrical |
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symmetry
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balance, the correspondence in style and form, and arrangement of parts
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sacral region
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a bone resulting from the fusion of two or more vertebrae between the lumbar and the coccygeal regions, in humans being composed usually of five fused vertebrae and forming the posterior wall of the pelvis.
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Pressure
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Covers a small area
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Force
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applied over a surface area
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8. What are possible asymmetrical postures acquired in the pelvis?
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pelvic obliquity
pelvic rotation pelvic tilt windswept hips |
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Describe pelvic obliquity
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one side of the pelvis is higher than the other when viewed in the frontal plan
left pelvic obliquity the left side is lower than the right |
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Describe pelvic rotation
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when one side of the of the pelvis is forward of the other side.
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Describe windswepted hip deformity
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one hip adducted and the other hip abducted
pg 180 |
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What seating system is use when deformities are fixed.
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design to accommodate the deformities rather than attempt to correct
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