Chapter 2 Flashcards
(20 cards)
Forms of motion
linear and angular
Linear motion
all parts moving in same direction @ same speed
Rectilinear
along straight line
Curvilinear
along a curved line
Angular Motion
rotation around central imaginary line (axis of rotation); @ most body joints
mechanical system
part(s) of the body that you have chosen to focus on
sagittal plane
splits body in left and right sides; forward and backward movements
frontal plane
splits body in front and back sides; lateral movements
transverse plane
splits body in top and bottom parts; rotation
Center of mass/ gravity
where the three planes intersect
frontal axis
perpendicular to sagittal plane
sagittal axis
rotates in the frontal plane
longitudinal axis
transverse plane rotation
Sagittal plane movements
Flexion, extension, and hyperextension; dorsiflexion and plantar flexion in foot
Frontal plane movements
Ab/adduction, lateral flexion, elevation, depression, ulnar and radial deviation, in/eversion, pronation and supination of subtalar joint
Transverse plane movements
Left and right rotation of neck, head, and trunk; medial, and lateral rotation of arm/ leg; supination, pronation of forearm; horizontal ab/adduction,
General motion
Linear + angular motion; most human movement
Circumduction
Circular movement of body segment
Cartesian coordinate system
Units measured in a 2 or 3 directional primary axes; x, horizontal; y, vertical; z, perpindicular
Velocity/ Speed formula
velocity/ speed (m/s)=
distance(m) ➗
time (s)