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Biomechanics Exam 1 Material
Terms in this set (23)
What is Biomechanics?
The application of mechanical laws to living structures, specifically to the locomotor system of the human body.
What are the two basic requisites for walking?
1. Continued Ground Reactive Forces
2. Periodic Movement in the direction of progression
Center of Mass should remain where?
In the pelvis (the body should not tip)
What is the first of six elements described by Inman?
Pelvic rotation should be about a ________ axis.
Pelvic rotation is accomplished with _______ and _______ of the hip.
Flexion and Extension
What is the rotation angle of the pelvis?
~4 degrees on either side of the axis
Does the degree of rotation change in pelvic rotation?
Yes - it increases with speed
What is the second element of the six elements described by Inman?
Pelvic list is _______ movement in the _______ plane.
When is there abduction vs adduction in alternating hip movement?
Adduction - Stance
Abduction - Swing
What angular displacement occurs in pelvic list?
What is the third element of the six elements described by Inman?
Knee Flexion in the Stance Phase
What is the purpose of elements 1, 2 and 3?
Decreases vertical displacement of the center of mass
Fourth and Fifth Elements of the elements described by Inman.
Ankle and Foot Mechanisms.
How many intersecting arcs of rotation are there in the fourth and fifth element?
What are the intersecting arcs of rotation?
Heel Contact - rotation of the ankle about the radius formed by the heel
Heel Rise - Rotation of the Forefoot
4th and 5th element have the overall purpose of:
Smoothing out the pathway
What is the 6th element of the six described by Inman?
Lateral Displacement of the Body
How much side-to-side displacement occurs with each stride?
~4 - 5 cm
which is increased with further distance apart, or decreased when closer.
There is a slight genu ______ which keeps the tibia vertical.
Inversion is movement where
The plantar surface moves toward the midline of the body
Eversion is movement where
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