Ch 7 Flashcards
Flexibility
To move a joint through a complete range of motion (ROM).
3 planes of motion:
Sagittal, frontal, transverse plane.
Sagittal plane
Allow for proper flexion
Frontal plane
Allow for proper abduction
Transverse plane
Proper internal rotation
Postural distortions
A misalignment of one or more segments of the human movement system
Relative flexibility
Process in which the HMS seeks the path of least resistance during functional movements
HMS is composed of the
Skeletal, muscular and nervous system
Poor flexibility leads to
Relative flexibility (leads to muscle imbalances)
Muscle imbalance
Results in:
- reciprocal inhibition
- synergistic dominance
- arthrokinetic dysfunction
- decreased neuromuscular control
Altered reciprocal inhibition
Caused by a tight agonist, which inhibits its functional antagonist
Synergistic dominance
When the synergists take over function for a weak or inhibited prime mover
Arthrokinetic dysfunction
Altered forces at the joint, resulting in abnormal joint movement and proprioception
Neuromuscular efficiency
The ability of the nervous system to properly coordinate muscular action
Mechanoreceptors-Muscle spindles
Sensory organs. Sensitive to change in length and rate of length change. Spindles are stretched when muscle lengthens.