PT 815 Lecture 2: Gait Analysis - Joint Moments and Muscle Contractions

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40 Terms

1
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What are joint moments

- Measure of a forces tendency to cause rotation about a joint axis

o External: GRF

o Internal: produced by tissue to counter GRF

2
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Initial contact GRF relative to the hip, knee and ankle

- Anterior to hip

- Anterior to knee

- Posterior to ankle

<p>- Anterior to hip</p><p>- Anterior to knee</p><p>- Posterior to ankle</p>
3
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Initial contact external vs internal moment at the hip

- External: hip flexion

- Internal: hip extension

<p>- External: hip flexion</p><p>- Internal: hip extension</p>
4
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Initial contact external vs internal moment at the knee

- External: knee extension

- Internal: knee flexion

<p>- External: knee extension</p><p>- Internal: knee flexion</p>
5
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Initial contact external vs internal moment at the ankle

- External: plantarflexion

- Internal: dorsiflexion

<p>- External: plantarflexion</p><p>- Internal: dorsiflexion</p>
6
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Loading response GRF relative to the hip, knee and ankle

- Anterior to hip

- Posterior to knee

- Posterior to ankle

<p>- Anterior to hip</p><p>- Posterior to knee</p><p>- Posterior to ankle</p>
7
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Loading response external vs internal moment at the hip

- External: hip flexion

- Internal: hip extension moment

<p>- External: hip flexion</p><p>- Internal: hip extension moment</p>
8
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What muscle contraction happens during loading response at the hip

- Concentric glute max and hamstrings

<p>- Concentric glute max and hamstrings</p>
9
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Loading response external vs internal moment at the knee

- External: knee flexion

- Internal: knee extension

<p>- External: knee flexion</p><p>- Internal: knee extension</p>
10
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What muscle contraction happens during loading response at the knee

- Eccentric quads

<p>- Eccentric quads</p>
11
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Loading response external vs internal moment at the ankle

- External: ankle plantar flexion

- Internal: ankle dorsiflexion

<p>- External: ankle plantar flexion</p><p>- Internal: ankle dorsiflexion</p>
12
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What muscle contraction happens during loading response at the ankle

- Eccentric tibialis anterior

<p>- Eccentric tibialis anterior</p>
13
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Midstance GRF relative to the hip, knee and ankle (sagittal plane)

- Posterior to hip

- Anterior to knee

- Anterior to ankle

<p>- Posterior to hip</p><p>- Anterior to knee</p><p>- Anterior to ankle</p>
14
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Midstance external vs internal moment at the hip (sagittal plane)

- External: hip extension

- Internal: hip flexion

<p>- External: hip extension</p><p>- Internal: hip flexion</p>
15
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What muscle contraction happens during midstance at the hip (sagittal plane)

- Eccentric iliopsoas

<p>- Eccentric iliopsoas</p>
16
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Midstance external vs internal moment at the knee (sagittal plane)

- External: knee extension

- Internal: knee flexion

<p>- External: knee extension</p><p>- Internal: knee flexion</p>
17
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What muscle contraction happens during midstance at the knee (sagittal plane)

- Eccentric hamstrings

<p>- Eccentric hamstrings</p>
18
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Midstance external vs internal moment at the ankle (sagittal plane)

- External: ankle dorsiflexion

- Internal: ankle plantarflexion

<p>- External: ankle dorsiflexion</p><p>- Internal: ankle plantarflexion</p>
19
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What muscle contraction happens during midstance at the ankle (sagittal plane)

- Eccentric gastroc and soleus

<p>- Eccentric gastroc and soleus</p>
20
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Midstance GRF relative to the hip, knee and ankle (frontal plane)

- Medial to hip

- Medial to knee

- Lateral ankle

<p>- Medial to hip</p><p>- Medial to knee</p><p>- Lateral ankle</p>
21
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Midstance external vs internal moment at the hip (frontal plane)

- External: hip adduction

- Internal: hip abduction

<p>- External: hip adduction</p><p>- Internal: hip abduction</p>
22
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What muscle contraction happens during midstance at the hip (frontal plane)

- Eccentric glute Medius

<p>- Eccentric glute Medius</p>
23
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Midstance external vs internal moment at the knee (frontal plane)

- External: knee adduction

- Internal: knee abduction

<p>- External: knee adduction</p><p>- Internal: knee abduction</p>
24
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What muscle contraction happens during midstance at the knee (frontal plane)

- NONE bahahah, Ligaments

<p>- NONE bahahah, Ligaments</p>
25
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Midstance external vs internal moment at the ankle (frontal plane)

- External: Ankle eversion

- Internal: ankle inversion

<p>- External: Ankle eversion</p><p>- Internal: ankle inversion</p>
26
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What muscle contraction happens during midstance at the ankle (frontal plane)

- Eccentric tibalis posterior

<p>- Eccentric tibalis posterior</p>
27
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Terminal stance GRF relative to the hip, knee and ankle

- Posterior to hip

- Anterior to knee

- Anterior to ankle

<p>- Posterior to hip</p><p>- Anterior to knee</p><p>- Anterior to ankle</p>
28
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Terminal stance external vs internal moment at the hip

- External: hip extension

- Internal: hip flexion

<p>- External: hip extension</p><p>- Internal: hip flexion</p>
29
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What muscle contraction happens during terminal stance at the hip

- Eccentric quads and iliopsoas

<p>- Eccentric quads and iliopsoas</p>
30
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Terminal stance external vs internal moment at the knee

- External: knee extension

- Internal: knee flexion

<p>- External: knee extension</p><p>- Internal: knee flexion</p>
31
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What muscle contraction happens during terminal stance at the knee

- Eccentric hamstrings

<p>- Eccentric hamstrings</p>
32
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Terminal stance external vs internal moment at the ankle

- External: ankle dorsiflexion

- Internal: ankle plantarflexion

<p>- External: ankle dorsiflexion</p><p>- Internal: ankle plantarflexion</p>
33
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What muscle contraction happens during terminal stance at the ankle

- Eccentric gastroc and soleus

<p>- Eccentric gastroc and soleus</p>
34
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Preswing GRF relative to the hip, knee and ankle

- Posterior to hip

- Posterior to knee

- Anterior to ankle

<p>- Posterior to hip</p><p>- Posterior to knee</p><p>- Anterior to ankle</p>
35
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Preswing external vs internal moment at the hip

- External: hip extension

- Internal: hip flexion

<p>- External: hip extension</p><p>- Internal: hip flexion</p>
36
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What muscle contraction happens during pre-swing at the hip

- Concentric iliopsoas

<p>- Concentric iliopsoas</p>
37
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Preswing external vs internal moment at the knee

- External: knee flexion

- Internal: knee extension

<p>- External: knee flexion</p><p>- Internal: knee extension</p>
38
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What muscle contraction happens during pre-swing at the knee

- Eccentric quads

<p>- Eccentric quads</p>
39
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Preswing external vs internal moment at the ankle

- External: dorsiflexion

- Internal: plantarflexion

<p>- External: dorsiflexion</p><p>- Internal: plantarflexion</p>
40
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What muscle contraction happens during pre-swing at the ankle

- Concentric gastroc and soleus

<p>- Concentric gastroc and soleus</p>