Intro Concepts
What is reverse muscle action?
When the origin moves towards the insertion
When is the body balanced?
When the COG falls within the BOS
True or False: Muscles can be active without innervation from a nerve.
False
What is it considered when a person is lacking joint movement?
Hypomobile
Weakness of which muscle causes scapular winging?
Serratus Anterior
What are the three joint classifications?
Fibrous, cartilaginous, & synovial
What is a force couple in the human body?
When a group of muscles work together to create rotational movement at a joint
What gives peripheral nerves the ability to regenerate?
Schwann cells
What are arthrokinematic motions?
Small movements of joint surfaces
What nerve innervates the trap muscle?
CN XI- Accessory Nerve
What is active insufficiency?
When a muscle is shortened to its extent across both joints
What is linear motion, and what movement is an example of it?
When an object moves in a straight line, scap protraction & retraction
What side of the body does the R side of the brain control?
L side of the body
What is it considered when two bones of a joint have "wiggle space?"
Open-packed
What bones make up the shoulder girdle?
Sternum, ribs, clavicle, and scapula
What is passive insufficiency?
When the muscle is lengthened to its extent at both joints
What is angular (rotary) motion?
When an object moves around an axis
What is the function of the myelin sheath?
Protects nerve impulses and speeds nerve transmission
What is essential to check for when measuring ROM?
Patient positioning and goniometer alignment
Give an example of a force couple of the shoulder girdle and what movement they perform.
Upward Rotation -UT/LT + SA
OR
Downward Rotation- PM + Rh + LS
What is optimal length tension?
The tension generated in skeletal muscle; function of the magnitude of overlap of myofilaments.
What is dynamics and what does it include?
The physics of a moving system, includes kinetic forces and kinematic motion
What is a neuron?
A cell in the nervous system that transmits information to other areas of the body
Name a few factors that affect ROM.
Age, gender, BMI, occupation/recreation, culture
Name the O,I,A,N for the Middle Trap.
O: Spinous Processes of C7-T3
I: Medial Acromion and Spine of Scapula
A: Scapular Retraction, min assist with upward rot.
N: CN XI- Accessory Nerve