Biomechanics Part 1

Question 1

Biomechanics definition

Answer 1

the study of structure and function

Question 2

Kinematics definition

Answer 2

describes the motion of the body without the how or why the body is moving; linear motion

Question 3

Kinematics example

Answer 3

body’s center of mass, also where gravity is most concentrated
each segment of the body has a COM; all average to anterior to S2

Question 4

Requirements for Angular/Rotational Motion

Answer 4

Requires fixed axis of rotation

Question 5

Two kinds of motion

Answer 5

active (internal activation of m.) and passive (no activation of m. needed)

Question 6

Osteokinematics definition

Answer 6

motion of a bone relative to its cardinal plane of motion

Question 7

Proximal on distal example

Answer 7

hip on femoral ABB or ADD

Question 8

Distal on proximal example

Answer 8

femoral on hip ABB or ADD

Question 9

DOF for hinge joint?

Answer 9

arguably two

Question 10

DOF for pivot joint

Answer 10

one

Question 11

DOF for ball and socket joint

Answer 11

three

Question 12

Arthrokinematics def.

Answer 12

motion between joint surfaces

Question 13

Three different arthrokinematic motions:

Answer 13

roll, slide, and spin

Question 14

Concave on Convex arthrokinematic motions compared to osteokinematics:

Answer 14

same direction

Question 15

Convex on Concave arthrokinematic motions compared to osteokinematics:

Answer 15

opposite direction

Question 16

Closed packed position

Answer 16

most congruent; least amount of movement/joint play

Question 17

Open packed position

Answer 17

resting position of the joint; ligaments not taught, usually midrange of motion

Question 18

Analyzing kinemtatics during a task

Answer 18

control (how smooth?) amount (efficiency), speed, symmetry (analyze uninvolved side), symptom (pain?)