Biomechanics Practice Question Compilation
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Questions and Answers

Interference in the acquisition of a skill can occur when two tasks are practiced in sequence with an interim period of?

  • less than 24hrs
  • less than 8hrs
  • less than 6hrs (correct)
  • less than 12hrs

    • what is the effect of aging on muscle?

  • increased range of motion
  • increased elasticity
  • increased stiffness (correct)
  • decreased hysteresis

    • The strain loads for a ligament during most daily activities, including walking and jogging, is?

  • in the toe region up to 1% strain (correct)
  • in the linear region up to 3% strain
  • in the linear region up to 5% strain
  • in the plastic region up to 8% strain

    • which mechanism can lead to ACL rupture?

    <p>valgus load with external tibial rotation</p> Signup and view all the answers

    which activity is likely to exacerbate patellofemoral pain?

    <p>descending stairs</p> Signup and view all the answers

    which posture is most free of mechanical stress?

    <p>reclining</p> Signup and view all the answers

    What variable factor is in the NIOSH recommended weight limit (RWL) formula?

    <p>frequency</p> Signup and view all the answers

    An event in the stance phase of human gait where there is no horizontal force

    <p>mid stance</p> Signup and view all the answers

    This source of power generation during gait increases most prominently with speed (i.e., between walking, running, and sprinting)

    <p>hip flexor</p> Signup and view all the answers

    A gait pathology caused by gluteus medius weakness

    <p>trendelenburg gait</p> Signup and view all the answers

    The effects of stroke on gait fits into which Perry (2010) functional category?

    <p>deformity</p> Signup and view all the answers

    motor learning is defined as the:

    <p>adaptation of control of movement that occurs with task rehersal</p> Signup and view all the answers

    the moment arm is effected by:

    <p>the joint angle</p> Signup and view all the answers

    which factor does NOT influence force production?

    <p>serial element</p> Signup and view all the answers

    which factors do NOT confound the angle torque relationship

    <p>the cross sectional area of the group of muscles</p> Signup and view all the answers

    what is a reason for the force velocity relationship?

    <p>resistance due to viscous damping</p> Signup and view all the answers

    bi articular muscles play a key role in:

    <p>all of the above.</p> Signup and view all the answers

    which movement would you expect to place the highest load on the ACL?

    <p>running downhill</p> Signup and view all the answers

    What factors/data are required to develop a model to measure patellofemoral joint (PFJ) stress?

    <p>all of the above</p> Signup and view all the answers

    free body diagrams:

    <p>are simple stick figures of the joint or whole body involved in movement</p> Signup and view all the answers

    weight is:

    <p>all of the above</p> Signup and view all the answers

    Which one of these activities would you NOT need to include ground reaction force in a free body diagram?

    <p>flight phase of long jump</p> Signup and view all the answers

    centre of pressure is

    <p>the point of application of the ground reaction force</p> Signup and view all the answers

    the joint reaction force is NOT:

    <p>generated between the foot and the ground</p> Signup and view all the answers

    overexertion can be caused by

    <p>all of the above</p> Signup and view all the answers

    which one the these sub phases is NOT in the gait cycle

    <p>pre stance</p> Signup and view all the answers

    at initial contact the hip, knee, ankle and foot are mostly in which position?

    <p>Flexion (hip), extension (knee), neutral (ankle), supinated (ankle)</p> Signup and view all the answers

    when we transition from walking to running, we do not see:

    <p>two double support periods</p> Signup and view all the answers

    An external torque/moment is NOT produced by:

    <p>muscles</p> Signup and view all the answers

    Most power generation and absorption occur in which plane(s) of motion?

    <p>sagittal</p> Signup and view all the answers

    hip abduction occurs in which plane of motion, and at initial contact we ___ power?

    <p>frontal and absorb</p> Signup and view all the answers

    at toe off, which muscle isn't active

    <p>glute max</p> Signup and view all the answers

    factors NOT affecting locomotion as we age include:

    <p>decreased latency period</p> Signup and view all the answers

    a common change in gait as we as is:

    <p>increased double support time</p> Signup and view all the answers

    the second functional category that gait abnormalities fall into as stated by Perry was:

    <p>muscle weakness</p> Signup and view all the answers

    which is not a common pointer for observational gait assessment?

    <p>muscle weakness</p> Signup and view all the answers

    according to the ACSM, a heel to toe drop should be

    <p>6mm or less</p> Signup and view all the answers

    developmental biomechanics is multidisciplinary and made up of 4 categories, these include

    <p>affective, motor, cognitive and physical</p> Signup and view all the answers

    the centre of mass of a limb in a child compared to an adult is

    <p>more distal</p> Signup and view all the answers

    which mechanical method is used to assess the safety of ground surfaces in children's playgrounds?

    <p>critical fall height test</p> Signup and view all the answers

    Study Notes

    Motor Learning and Gait

    • Interference in acquiring a skill can occur when two tasks are practiced in sequence with an interim period.

    Gait and Aging

    • The effect of aging on muscle is significant.
    • Factors not affecting locomotion as we age include:
    • A common change in gait as we age is:
    • The second functional category that gait abnormalities fall into as stated by Perry is:

    Patellofemoral Joint (PFJ) Stress

    • Factors/data required to develop a model to measure PFJ stress include:
    • Activities that are likely to exacerbate patellofemoral pain include:

    Ligament Loads and ACL Rupture

    • The strain loads for a ligament during most daily activities, including walking and jogging, is:
    • Mechanisms that can lead to ACL rupture include:
    • Movement that would place the highest load on the ACL is:

    Muscle Function and Gait

    • A gait pathology caused by gluteus medius weakness is:
    • Bi-articular muscles play a key role in:
    • At toe off, the muscle that isn't active is:
    • Hip abduction occurs in the frontal plane of motion, and at initial contact, we generate power.

    Gait Cycle and Joint Forces

    • At initial contact, the hip, knee, ankle, and foot are mostly in a:
    • During the stance phase of human gait, there is an event where there is no horizontal force:
    • Centre of pressure is:
    • Joint reaction force is NOT:
    • Free body diagrams:

    Power Generation and Force Production

    • A source of power generation during gait increases most prominently with speed (i.e., between walking, running, and sprinting).
    • The moment arm is affected by:
    • A reason for the force-velocity relationship is:
    • A factor that does NOT influence force production is:
    • Overexertion can be caused by:

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    combo of all multiple choice practice questions, only those without pictures.

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